Pemrograman cnc tu 3 a

EMCO F1-CNC
Basic

Preface
The use of CNC-machines will still
increase in the future.
Not only in industrial production also in
small workshops conventional machines will be replaced by CNC-machines.
The application of CNC-technics is not
bound to the classic machine tools
such as lathes, milling machines or to
the metalworking area. One could say,
nearly every day a new application of
CNC technics is realized. Practically
all occupations such as technical designer, technical manager or salesman, skilled worker, methods engineer, controller, etc. will be confronted with CNC-technology in many
ways.

CNC basic knowledge is important for
everyone of them. How spezialized this
knowledge must be, will depend on the
specific occupation.
EMCO MAIER & CO. is also producer
of CNC production machines and since
a long time experienced and active in
technical education worldwide.
After producing the EMCO COMPACT
5 CNC which is used worldwide successfully for years, the EMCO Fl-CNC
has been developed.
As the method and the concept of the
EMCO COMPACT 5 CNC has been very
successful, we designed the F1-CNC also that way: the student should work
on the machine from the very first hour.

Marialin for
t ools

Many contents which ale difficult to explain and often
net understood when taught theoretically, can only be
explained by working on the CNC.machine.
Operating a CNC machine, milling with ditterenl cut
ete. can only be learned by practical working.

Chip guard

CNC milling machismo are built in different types:
Horizontal-, vertical, portal milling machines, inachi
lung centers, etc Therefore we designed the machine
so that CNC. milling . covering all types can be pc(
termed
Consider machin• and teaching material as a The
book BASIS is developed for the student. For the tea.
cher an additional handbook and Overhead slides are
available. Use this handbook in addition to the bock
BASIS if you want to do it in a self teaching course.

Switch tti change
axis system
h-OriioniTairvertical

ChuCtl change
loonslem

MilitioHead IQ/
tye

•

Ali rignts reserved especially those of diffusion and duplication through film, radio, television. photomechanical
reproduction. sound tracks of any and every kind, translation into foreign languages, reprints Of, extracts from the text.
0': 1984 by EMCO MAIER & CO. Fabrik fUr Speziaimaschinen, FriedmanmMaier-Stralie 9, A-5400 HaHein, Austria.
Printed in Austria,

1. General

— Technological data
— Finding the Chip Removal Values, Speeds
— Mounting the Tools
-- Chucking the Workpieces

Technological data
3. Feed Rate and Depth of Cut

1. Cutting speed (Vs)
Vs (m/min)

d (mm) x lr x S ( rpm)
1000

F = Feed rate (mm/min)
t = Depth of cut (mm)

Vs = Cutting speed

Generally: feed rate and cutting speed
depend on-

d = Diameter of workpiece
S = Main spindle speed
The maximum cutting speed
- Material

depends

- workpiece material
- performance of machine and
- geometry of milling cutter.

on

of workpiece:

higher the resistance of the material,
the lower the cutting speed.
The charts contain the following data:
V s = 44 m/min for aluminium (Torradur
Vs =

35

B)

m/min for soft steel
soft plastics

V s = 25 m,/min for tool steel
hard plastics
- Material of tool:
Carbide tools allow higher cutting speed
than HSS tools.
values given in the charts are for
HSS tools.

2. Spindle speed (S)
tile speed of the milling
spindle from cutting speed and diameter
of milling cutter.

S (rpm) =

Vs (rnimin) x 1000
d (mm) x

Material of workpiece
The higher the material resistance the
larger the feed and the depth of cut
(limitation by milling cutter geometry).
The charts contain orientation values
for the F1-CNC.
Connection F

t

The larger "t" the smaller "F" and vice
versa.

Procedure
The technological data are written into
the tool specification sheet.
Finding the feed rate and the depth of
cut:
Material: aln inium

71)

• .

FecA1

tx:

w,

Me.

i

r".'

Depth of cut
(t = 10 mm)

i
j

IF = 60

• •

t") Dia. of milling
(d=10 mm) I

1

L__

cutter

mm/mil711

L___

You can also proceed in a different
way:
Feed rate F
200
'14

, 1 ,–H Dia, of milling
cutter 10 mm)
I

I
"'Depth of cut 4,2 mml

LA(

Finding the speed of rotations:
Diameter of milling cutter

vs
S

Correct cutting speed for the
specific material
Spindle speed
The same procedure appiies for drilling.
PS: Dcwncut milling -- Conventional
Milling
The specific knowledge is presupposed.
however, with the Fl-CNC the differences may be neglected.

Milling
Depth of cut • Cutter diameter - Feed

Drilling
Diameter of drill bit • Feed
mm

1
10
9

8

1,5

20

30

40

50 60

80 100

150

200

300

400

WO, mm/min

Speed (of rotation) — Cutting speed — Feed

25 00
2000

c
E

0

150 0

1000
900

800
700
600
500

400
300

200

Attention
When plunging in with cutter, halve feed
values of mill chart.

Service and Maintenance of Machine
Lubrication:

Lubricate guideways of longitudinal, cross
and vertical slide daily using oil gun (1
nipple on vertical slide, 2 nipples left
side underneath longitudinal slide).
Pressure resistant, corrosion-protective oil with slip-stick reducing
characteristics.
73 mm/sec (cSt) reference temperature 40° C.
E.g. CASTROL MAGNA BD 68
This corresponds to the CINCINNATI
Specification P47.
Spindle taper for tool mounting

Interior taper of main spindle and tool taper
have to be free of grease and dust (force
locking)1

Safety measures
Pay attention to the general and specific
milling safety rules. The knowledge about
them is pre-supposed.

Raw material
If you • use aluminium, take only machinable.
aluminium.
Advisable material:
Torradur 3, Al, Cu, Mg, Pa F38, material no.
3,1645,51 according to DIN 1725/1747 or similar.

Tools
Use high quality and well sharpened tools only.

Clamping of Tools
Attention:
Spindle taper and tool taper must be dirtand dust-free.

Clamping with collet chuck
Tools with cylindrical shaft are clamped
with the collet chuck.

Note:
Put collet into nut inclined so that
the eccentric ring grips the groove
of the collet. Screw nut with collet
onto collet chuck.

Taking out the collet:
Unscrew nut. The eccentric ring in the
nut presses the collet out when unscrewing.
Maintenance
Use oil and clean collet and collet
chuck after use. Chips and dirt can damage the tapers and influence the precision.
Collets

Clamping of tools
Put tool into collet and tighten aut
with cylindrical pin in clockwise direction. For counter-holding of main
spindle put cylindrical pin into collet holder.

1A

You find the clamping capacity in inch
• and metric engraved on the collets. Diameters smaller or larger than indicated
must not be clatped.

Clamping with shell end mill arbor

Using the arbor you can clamp tools up
to a bore of 16 mm. The 4 spacing collars serve for adjusting the different
width of the milling cutters.

02m:ffiti

Clamping Possibilities for Workpieces
Clamping bars
The clamping bars are mounted directly
onto the slide depending on the relative workpiece.

Machine vice with stop
Width of jaw: 60 mm
Clamping capacity. 60 mm

Stepped clamping shoe
Height: 60 mm
For clapping a workpiece
need
at least two clamping shoes.

1.8

3-jaw chuck (2x 3 Jaws)

4jaw chuck (2 x 4 jaws)

4-jaw independed chuck

For holding of round, triangular and hexagonal workpieces centrically.

For holding of round,
square and octogonal
workpieces centrically.

For holding of workpieces
centrically and eccentrically.

Adaptor plate
To mount 3-jaw, 4-jaw chuck
and independent. The adaptor
plate itself is mounted on
to the milling table.

Intermediate plate
Ti mount 3-jaw, 4-jaw cnuck
and independent. The 'intermediate plate itself is mounted on to the dividing atachment. The dividing attachment is clamped to the millinq
table with two T-nut screws.
Dividing attachment

The Dividing Attachment
Operating tips

TECHNICAL DATA
Diameter of rotary table; 150 mm
Worm reduction:

1:40

T-slots according to factory standard
Number of holes in dividing plates:
27,33,34,36,38,39,40,42
OPERATING ELEMENTS
Clamping levers for rotary table (1):
Clamping levers are Loosened during the
dividing operation itself, but must be
clamped before every machining operation
Indexing pin with handle (2):
During direct dividing from 15° to 15°.
the pin rests into the parameter notoiles
of the rotary table. During indirect dividing (worm dividing) or free dividing
by means of the graduated scale, the Indexing pin must be pulled out and swivelled to the left.
The graduated scale (3) is for controlling the divisions.

2

4

Crank handle with index plunSer (4)
moves the worm which is engaged with
the wormwheel of the rotary table during indirect dividing.
The shears serve to facilitate adding
the number of holes when a fraction of
a turn is to be added.
Disengaging and engaging the worm:

T-slots of the dividing attachment

The alien head screw (5) is loosened.
When the dividing plate is turned counterclockwise, the worm and wormwheel
are disengaged. The rotary table can be
turned by hand for direct indexing. Sy
turning the dividing plate clockwise,
worm and wormwheel are engaged. To facilitate engagement of worm and wormwheel,
the rotary table should be moved slightly by hand.
The alien head screw (5) must again be
retightened.

Types of Dividing

Indirect

dividing:

Direct dividing:

Indirect dividing offers many more dividing possibilities and is more accurate because of the worm reduction of
1:40.
Indirect dividing method:
If the crank handle is turned 40 times,
the rotary table makes 1 revolution
(360°). With help of the dividing
plates, exact fractions of turns can be
executed.

Worm and wormwheel are disengaged.
Possibility 1:
Dividing by means of the indexing pin.
Dividing possibility from 15° to 15°
(i.e., maximum of 24 divisions within
360°).
Possibility 2:
The dividing can be done freely with
the aid of the graduated scale on the
rotary table.

Note
With indirect dividing the indexing pin is
always disengaged. For manufacturing a
workpiece the rotary table has to be fixed.

The

indexing chart:

1st column: indicates number of divisions
per 3600
2nd column: shows the corresponding angle
of the division
3rd column: shows the number of 360 0 crank
handle revolutions which are
necessary
4th column: shows the number of holes to
be added for each index plate

Example of an indirect dividing operation:
Desired division: 13 divisions in 360°
From the indexing table it can be seen
that at the desired division 13, 3 full
crank turns must be made plus a fraction. turn of 3 additions) holes on the
indexing plate 39.

4. Execution of the dividing operation:
3 full turns plus the fractional turn
of the 3 added holes are made; that
means that the plunger is placed in
the black hole. One dividing operation is completed.

Practical execution:

1. The indexing plate with 39 holes is
mounted.
5. Next dividing operation:
The shears are turned until the left
arm touches the pin again; the next
dividing operation follows as described in 4. above.

2, in the indexing table one sees that
at the division 13, 3 full turns plus
3 holes on the 39 plate have to be
added.. Therefore, the shears are fixed
so that they include 4 holes.
NOTE: The shears may not be moved during
the dividing operation, otherwise they
do not serve their purpose as an orientation aid.

3. The indexing plunger is placed in a
hole of the 39 plate (marked black on
the drawing) and the left shear arm
moved until it touches the pin of the
plunger.

NOTE: If a larger number or holes has to
be reached than the maximum opening of
the shears allow, you have to set the
difference of boles between the shears.

Example
21 divisions per 360 0 have to be carried
through. From the chart one can see that
one full turn p lus the fractional turn,
of 38 holes on the disc 42 have to be
carried through. 38 holes cannot he set.
Thus: 42-38=4 holes. When dividing you
make one additional turn (2 turn ailtogether) and turn back the difference of
4 holes (the shears comprise 5 holes).

4 4 el

Formula for the Calculation of the Hole Numbers Required
z No. of divisions required for one revolution of the workpiece.
INDEX TABLE
K No. of revolutions of handle for a complete revolution
for
of the workpiece.
MAXIMAT
n
No. of revolutions of handle for one dividing move: n =
Worm reduction of dividing head 1:40; i. e. K = 40.
,
to. ■
!
I
Amount of holes to be added
Amount of notes to be added
7. I
•Zr1 1
[ .....
as .
w ;
114e o .
for each index plate
for each index plate
0 : , 1 '2.-cr
=
c,
c ' o 1 ,3 0
0
,z, ,444 - o
,
,
th' :• o, 1 °. 6" .1
"'
71 1 8, i c
•2'6: 27! 33 34i 36 38 39 40 42
-a7-' 1 E 1 2.`?:. 27 33 34 36 38 39 40 , 42
4
2 h 18020
10
9
32 1
1 1
201
!
1
1
;
7
: 175 1 . 191 121
33 i
1
1I 170°.,18 1. 24 1'4
34
1 1
.-,-.
-L-,
[
i
.;
1 1
j 160'7117! 21 :
35J
6 ..
1
4
150-1 16 18
36 ; 100/. 1
-4
1
140.": 15: 15 .
2
I
38 '
11
-r--- I 12 i --1-:i
' 130':' 14!
1
39 :
!
125'' 13 1 24 !
40: 9`-' .
110111111111.11111
3 12013" 9 11; ---, 12
40
13
14
1
42 '
III
4 110°--r-- ---1. ,
'.12 6 .
III 30
44 i
--I
r
100°! 11 3 [[
24
45 8 c:
32
i
4._. 4' 90'' 1[ 1 0-ir !
35
t
'
48 :
30
____.
50:
: 80 -- 24
8.
!
'
32
f
-4-76'r : 8 9' 11
L12 '
14
13
7'• , 21
'
28
.
5 ' 72'781
30 •
52
i
d 70"' 7 ' 21 .
i
1
54 i
1... 20
. ! 65 Q71 6 1
-1--,
551
H.
2 1
.
i,
60°–'- 6:it 18 '1 22,
,
26
30
56 '
.
28
55 63 :
'1
18
60 6°
---5 1'
1
7
30
64 '
25
,
:.
.t
:
65 '.
24
:50 5 15 :•
f
,
I
8 1--- 45'-' 51
i
1
1
I
1
20
I
66'.
i.- I--}
• 40', 414 12 1
1
16 :
68
4.:
410 • 36 ,': 4 :1
!
•
7
70 •
24
t---f
11
3:
21 '
'
1
72 ; 5° .__
15
20
•
12 : 30': 3, 9 1 11 '
12 ;
14
13!
76:
20
!
,
131
1
1
1
:31
3'
20
781
4---i-,.
-T4 1,I 36
I 2
r 1[ 1 ,
17 18 19
•
.
:
80
20
4i 25-' 1 22
84
84
•
-r—15 ; 24'1 '; 2!18 :. 22 : 424 ,
t
28 .
26 1i—
85
'
' 16
t 2 IT17 ; 18 ' 19
----Idt
! 20 21
88
15 !
17 •
4.' 2 r ;•
: 12 1
:
12
1
90 4" 1:
4_
I-1-18 [I 20'-' [ 2 1 6 .•
!
. 8 !
95
16 =111
1
t
-1r-19
'
•
1 4
;2
96
15
4.!
11.
'.t
20 ' 1-EV.• ' 2
•
'
100
I
MOEN
'16 • 1 I• 21T .1!_ I.!
9 11 1
13 MIMI
12
3j
—1_
.4-,
f-•
1802r 421 :
! .I
,
i
:
L
.38
1
6
! 8
,
Mil
.
-22 ,
' 1 •. t- 27:
:
200
'
:
8
+
+
_ -4-24 ' 16'-' + 11 18 1: 22 i[
240
!•--k•6
24 '
28
i 26 1
:
Ell
l---25Hr —,-+ ef .{-i, -4.• __i__.. 1,i - -- i
270.
i
--L
:-i .' 4 •
24
t
3601°11
26 F1
1 3!
1 1--4- ':
[
21
' ---t- i.
-1-1
i 40'
;
2
1 ' 13 i
MEIN
,
28
30
18
iL I
2 WIMINININ1
.
'
27
4-- 1- 131
1'
20' '
!
30 1- 1 ' 9 11
2-712 '
14
13
10111111111.11
i:

1

Q)1

1

–

.1

/

--.

,

1 !

'

L

-1---

1

I-

-I-

1

24

1

f

is

:

1

i• •

■-•

i

i

H-

.1

,•

—

1

120

1

!

I

:

• •

1

'

• 4--

.

Chapter 2: Handoperation
— Operating element (survey)
— Positioning of milling cutter
— Traverse indication
— Input of X, Y, Z values
Switching feed motors
"Curventless"

2.2
2.4
2.7
2.8
2.11

Traverse — Hand Operation

Monitor

Display
After switching on the machine, the figure 0 appears. Lamps X,Y or Z are on.

N

X,Y,Z when

G XYZ F

©

D,‘.1 K

M

If you traverse in tX, the lamp X lights
up. When you take your finger from the
key, the traverse distance is shown in
1/100 mm on the VDU. With a distance of
2,45 the display indicates 245.

N

The screen snows zero for
you switch it cn.

With the exception of rapid traverse
the indication is shown continuously
in steps of 0,5 mm.

G XYZ F

ggcoo.9)00
D,J IC

M

245

If you press the Z--key, the light jumps
to the Z-lamp. After you lift your finger from the key , the traverse distance
appears (with 6,28 mm 628 will appear)

N

g0
Doi K

G XYZ F

0 © (o o 6)

628

Minus sign on display

N G XYZ F

(000) © 0

D,J K LT

M

628

XY
-30 -340 250

Input of X, Y, Z Zero-Values from any
chosen Milling Position

The display shou.,,d indicate zero, in
case the milling cutter stands at a
given point (X=0, Y=0, Z=0).
You can program the X,X,Z displays tc
indicate zero.

The milling cutter is at a distance of
22,1.5 mm to the workpiece edge in X.
The display indicates whatever value.
In case the milling cutter traverses
in +X direction by 22,15 mm, then the
display should indicate the value X=0.

N G XYZ F
© (I) 0 0) © 0
T
D,J K

Procedure:
1. The lamp X on the display lights up
2. Press INP - the lamp X flashes

N2 EE

INP
2215
INP

3. Put in the value
(no plus/
minus sign, because the milling cut-.
ter should. indicate with plus "traverse direction 0").
4. Press key INP. The flashing of toe
X--lamp stops.

You can enter the Y,Z values in the
. same way.

When programming minus-values first put
in the figures, then press key minus,

2R

Application of Path Programming
in Hand Operation Mode
Zero point for the dimensionirg is
the workpiece edge. The milling cutter
shall move to this point. The displays
shall be set zero,

Procedure:
1. Scratch surface, set Z-display zero,

2.

Scratch surface in X-direction. Put
in value of milling cutter radius r.

3, Scratch surface in Y-direction. Put
in value of milling cutter radius r.

Note:
You can traverse after scratching as you
iike. If you program the zero-point, you
have to add to the X,X displa y the radius value and put it in..

Exercise:
i.

Program the display X,Y,Z=0 if the
milling cutter is positioned onto
the edge,
Move the milling cutter to the indicated. position.

Switching Feed Motors "Currentless"
When switching on the machine the feed
motors are currentless.
If you.have - in hand- or CNC-operation

mode - moved the slides the feed motors
stay under power.

N

1.0.0
50 r r /(1,C

Switching currentless - with no program
being stored

G XYZ F

O 0 CUD 0 0
K LT M

641 0

300
AOC

INP

H/C

DEL

M

REV
FWD

tip

START

1. Switch to CNC-operation mode: Press
H /C key.
I

2. Press key
3. Key
VDU.

inE

. The light jumps to G.

. The

rownher appears

4. Press keyilNPI. Now the feed
are switched currentless.

on the

motors

Switching currentless - with a program
being stored
N

G64 is a pure switching function. It is

G XYZ F

O 000
D.J K LT M

64

not stored.

0
H/C

ti4

START

1, Press
on.

key

so that G light gets

2. When a number appears on the VDU,
press DEL
3. Key in
4. Press

EE

keyra?. Now the feed motors
are switched currentless.

Operating Elements
Control Elements
Hand Operation

NUMERICALLY" CONTROLLED-:.-

1. Main switch

3. Emergency stop button

Turn key to the right. Machine and control part are under power (except emergency stop button is pressed).

Control unit, feed motors and main motor are cut off from power by pressing emergency stop button: turn button
to the left - it will jump back to
orginal position. Main switch has to
be switched on again.

2. Control

lamp main switch

When main switch is on, lamp is on.

'11

4. Switch for main .spindle

12. Control lamp for hand

Turn switch to the right.

13.JH /CLswitch key:
operation

5. Turning knob for speed control of
main spindle
6. Ammeter
Shows power consumption of main spindle
motor. In order to protect motor
against overload, the power consumption
should not surpass 2 A with 220-240 V
or 4 A with 100-110 V.
7. Feed keys for longitudinal, cross and
vertical slide
8. Rapid traverse

key

If keys for feed and rapid traverse are
pressed together, then the relative
slide will move with rapid traverse.
speed.
9. Turning knob for setting the feed
rate
10. Inch/metric switch and switch for
changing the axis system
11. Digital read-out

for slide movement

i X, t Y, ± Z are shown in 1/100 mm
or 1/1000 inch.
Plus movement without sign
Minus movement by a light beam

125
X -1,25 mm or -0.125 inch

operation

hand operation/CNC

If you press the(H/Clkey the light of
the control lam p hand operation will
jump to CNC operation (operation mode:
CNC). Bypressing the key once again
the . light will jump back (operation
mode: nand operation).
14. DEL key
The X,Y,Z values are set to zero.
15. Thel-4. key
lkey ycu can switch from
With thei
X to Y to Z without movement of slides.
16. The INP key
With the INPI key you enter the values
for slide movements.
17. M-key
Activates switching exits.

•

Hand Operation F1-CNC
Positioning of the Milling Cutter

1. Scratching front sides and top side
With milling most measuremen-zs refer
:)uter edges. In order to use the measurements of the technical drawing you have
tc, "zero-set" the display and use as reference/starting point the outer edges.

Example
Milling cutter with dia. to mm.
Move milling cutter in Z-direction
until you scratch surface slightly.
Set. Z-display to zero (press key
DEL),

Scratch front side in X-direction..
- Set X-display to zero (press key DEL)

X Y
0

-

Scratch. front side

in

Y-direction.

Set Y-display to zero (press key DEL)

Zerasetting of Display to Zero Point
of Dimensioning (Example: Milling)

Example: Milling of groove
- The groove is milled using a 3 mm
cutter.
- Zero point for the dimensioning
is the workpiece edge and surface.
- The. measures refer to the center of
the milling cutter.

X=0/ Y=0

Consequence
Move axis of milling cutter to edge of
workpiece.
a) Scratching of all 3 surfaces and zero-setting of X,Y,Z.

N G XYZ F
©CD(530)(DO
T M
D,J K
4001
DEL
•

G XYZ F
(DO
CD
D,J K T M

0

b) Move by value of milling cutter
radius into X-direction. Set X to
"zero".

c) Move mill, cutting by value of milling cutter radius into Y-direction.
Set display to "zero",

N G XYZ F
©(p01;) ©
D,J K TM

400

•

DEL
NO XYZ F
D

K

TM

Exercise
Move milling cutter such that all dlsplay values are at "zero".

Exercise
Mill a recess as in drawing. Enter the
following values:
Spindle sped
S (rpm)
Feed mm/min
Infeed in X (mm)
Infeed. in Z (mm) !
Pay attention to set correct feed.

A

1

Chapter 3

CNC-Operation Survey
—

Operating and control elements

— Preparatory functions,
miscellaneous-/Switching functions
Artarm signs
— Possible inputs
— Operation CNC
Operation magnetic tape

3,2 - 3.3
3.4 - 3.5
3.6
3.7
3.9
0

ra

uNu-uperauon tQurvey)

Operating Elements
Control Elements
CNC-Operation

1. Main switch with removable 'Key, Memory is being cleared when switching
off,
2. Control lamp shows the power supply
• of machine and control unit.
Emergency stop button with interlock.

Unlocking of button: turn button to
the left. To switch on machine, turn
main switch to zero and. to 1 again.
When switching off also memory will

be cleared.

4. Optional switch .for axis system and
for metric or inch mode of operation.

CNC-Operation (Survey)

5. Switch for main spindle

11. Keys for program input, correction,
storing of program on tape, V24
operation etc. (see detailed explanations)

Position 1 (main spindle ON, without M03)
Position CNC: main spindle is
switched on by programming M03 and
switched off by M05, M06 (with F*0)
and M30.
6. Ammeter
7. Magnetic tape
switch key
Manual/CNC operation
9. Control lamp CNC operation
10.1-HAW-IT-key
The program is being worked off

11.1. Number keys 0 -1791
I1.2..7 The minus sign key
-7
To enter minus values the minus
sign E] has to be pressed after
input of numbers.
11.3. INP1 key (INPUT = storing)
Storing key

12. VDU (display)7
Indicates values for address letters
and modes of operation

11.4.1DEL1 key (DELETE = erase)
Erasing key

13. Control lamp address letters

11.5.1FWD1 key (FORWARD)
Program jumps forward block by
block

14. Control of milling spindle speed

11 .6 .

key (REVERSE)
Program jumps backwards block by
block

11.7. H.] Arrow•key
Display jumps word by word
11.8, ld key: key for entering of miscellaneous functions.


Survey
Preparatory Functions, G-Codes

G 00

Rapid traverse

047

Add tool radius twice

V: N3/G00/X±5/Y±4/Z±5
10/G47

H: N3/G00/X14P1±5/Zi5.

G 01

Linear interpolation

G48

Subtract

tool radius twice

V N3/COI/X±5/Y-174/Z±5/F3
N3/G4S
H: W3/G0i/X-1-4/Y:S/Zi-5/F3

G 02

Circular interpolation clockwise

GO-3

Circular interpolation counterclockwise
Quadrants:
m.3iG02/
Y:
X--',/Y-14/Z±5iF3
GO.'

G64

Feed motors without current.
(switching function)

G65

Magnetic tape operation
(switching function)

N3/M)9/J2/K2 (Partial circles)

1■13/G65

004 Dwell
N3/G04

0 66

Activating RS 232 Interface
115/G6;::

G21

Empty block.
N3/G21

•072 Pocket milling cycle
V: N3/GT2/Xf5/Y14/Z:F3

025 ' Sub-routine program call
•
143/G25/1_,;17 ) 3

H: N3/G72/X1t41YI5

74 Thread-cutting

G27 Jump instruction

N3/G74/10/Z/F3

143/G27/L (F)
(;414)

Tool radius compensation cancelled
N3/G40

G45 Add tool radius
NJ/G45.

G46

Subtract tool radius
NJ/G46

cycle

(left-hand)

081

Fixed boring cycle

N3/G61/Z15/F3

082 Fixed boring c y cle with dwell
N3/G82/Z-3/F3

G83 Fixed boring cycle with chip
removal
N3/G83/2/F3


G 84

Ggm Incremental value programming

Thread-cutting cycle

N3/091
N3/064/1(3/7,-5/F3

G85

92 Offset of reference

Fixed reaming cycle

V: N3/G92/X5/Y24/Zf5

N3/G85/Z-S/F3

H: N3/092/X14/Y1-5/Z-5

G89

Fixed reaming

cycle with

dwell

N3/G89/Z15/F3

G90

Absolute value programming

V = Vertical.
H = Horizontal

N3/090

Miscellaneous or Switching Functions

MOO - Dwell
N3/M00
M03 - Milling spindle ON, clockwise
N3/M03
M05 - Milling spindle OFF
N3/M05
M06 - Tool offset, milling cutter radius input
N3/M06/D5/S4/Z± 5/T3
M17 - Return to main program
N3/M17
M08
M09
M20
M21

M22

Switching exits
N3/M2

M23

M26 - Switching exit - impulse
N3/M26/H3
M.30 - Program end
N3/M30
M99 - Parameters circular interpolation
(in connection with G02/03)
N3/M99/J3/K3

Alarm Signs

A00: Wrong G/M code
A1:

Wrong radius / M99

A2:

Wrong Z-value

A3:

Wrong F-value

A4:

Wrong Z-value

A5:

M30 code missing

A6:

M03 code missing

A7:

No significance

A8:

Tape end with cassette operation
SAVE

A9:

Program not found

A101 Writing protection
All: Loading mistake
Al2: Checking mistake
A13: Inch/ run switching with full program memory
A14: Wrong mill head position/path in•
/M or---H/M
crement with LOAD
A15: Wrong Y-value
A16: Value of milling cutter radius
missing
A17: Wrong sub-routine
A18: Path milling cutter compensation
smaller zero

3.6


Possible inputs
(Otherwise alarm signs)

Inch

Metric
Values

Values

Unit (mm)

Unit (inch)

1/1000"

Xv

0-19999

1/100 mm

0-7999

XR

0-9999

1/100 mm

0-3999

YV

0-9999

1/100 mm

0-3999

1/1000"

YR

0-19999

1/100 mm

0-7999

1/1000"

ZVH

0-19999

1/100 mm

0-7999

1/1000"

Radii

0-9999

1/100 mm

0-3999

1/1000'

D(X) milling cutter
radius with MO6

0-9999

1/100 mm

0-3999

1/1000"

F

2-499

mm/min

2-199

1/10"/min

T(F) tool address
M06

0-499

0-199

1

1

L(F) jump instructions

0-221

H(F)

0-999

exit signs M26

J/K circular parameter

0-90

Adresses
N, G, X, Y, Z, F, D, J, K, L, M, T, S, H

.

1/1000"


Operation CNC

LINPI Storing of word contents

[DEL Deleting of word contents
FWD.] Forward in program block by block
GREVI

Backward in program block by block

HI1, 1

Forward in block word by word

lM

Input of M-functions

Program hold:

FWD]

1INP

Program interruption

LINP

RE vj

Delete program
LDELi+ INP ]
First DEL; then INPi

Operation — Magnetic tape
Storing of program on tape
G65

Fiicril --

number —

FWD

I INPj

Put in program

r--7

LDELIremains pressed.
Delete alarm
REV!

INP1

Insert block
ry

fi

IINP

Transmit program from tape to memory

Select program

G65INP
number --b. iINP1

Delete tape contents
G65

Delete block
+DEId
Single block mode

T

3

etc. +1STARTI

Testrun:
1M

1

+

Chapter 4
CNC-Basics
4.1

CNC-lathe - The control
CNC-machine - Main elements
What happens in CNC-manufacture

4.2 - 4.3
4.4 - 4.7

Differences in manufacture using a
handoperated or a CNC-machine
This you are going to learn

4.8 - 4.9
4.11

What is programming
The coding standards

4.13 - 4.15
4.17 - 4.19

4.21 - 4.23
Program structure
4.25
GOO/G01
Description of path lengths for slide movements 4.27
The CNC-program (structure)
4.29
The address words of the program
sheet F1-CNC
Standardization of axis systems
for CNC-machines
Concept of programming Methods of programming
Dimensions of drawings
The modes of programming
G90/G91

4.31 - 4.33
4.35 - 4.41
4.43
4.45
4.47
4.49 4.51

Determining the coordinates for
programming in absolute mode

4.53 - 4.55d

information to the control concerning
4.57
the workpiece zero-point
Fixing the origin of the coordinates on the
4.59
F1-CNC (workpiece zero-point)
Fixing the zero-point of coordinates with
G92 - Programmed offset of
4.61 - 4.69
reference point
Various workpiece zero-points
4.71 - 4.73
in one program
4.75 - 4.77
Mixed programming
Connection: G92 - Zero-point offset/
M06 - Tool lengths compensation

4.79

4.81 - 4.83
Some tips for procedure
4.85 4.87
The M-functions
4.89
Description of block formats
Types of controls of CNC machine tools 4.91 - 4.97
4,99 - 4.143
Programming - Geometry

CNC-Lathe
The Control

What ist a CNC-lathe?
- A machine which we feed with figures
and letters
= DATA INPUT
- A. machine which "understands" the data
which processes it and calculates.
= DATA PROCESSING
- A machine which passes on this calculated data in form of instructions,
= EXECUTION
- A machine which follows the instruction

Meanings in daily use
Tne meanings change quite often in
their daily use. NC-machines were originally machines with numerical control,
but no microprocessor. Today such machines are obsolete. The program was
read in directly from the perforated
tape.

Today NC-machines comprise all types
CNC, ANC or AC types.

CNC-machine - Main elements

CNC — Machine — Main Elements —
A "humanized" Comparsion

Data Input:
Via keys or magnetic tape

interface element
can be compared to
a secretary

Output element:
Lets call him
press speaker.
Central Processing Unit
Microprocessor. Let's
call it the director.
He delegates, takes decision, calculates.
A watch gives him the
feeling for time, but
he does not have any
specialist knowledge.

Operating program
(EPROM)..

Memory HAM
Remembers the
program

specialists.
They know
everything.
Output element (Interface): Chief operator
He receives orders and
passes them on.

Amplifier (foreman)

CNC-machine — Main elements

CNC-Machine — Main Elements
Digital read-out

Data Input

Central processing
unit = Microprocessor
(Director)
Output e ement
(press speaker)

Operating program =
EPROMS (Specialists)

Output element
Interface
(Chief operator)

Amplifier
(foreman)

What happens in CNC-Manufacture

3. specialist ---4■Director:

,Data input

"Yes, o.k."

I Data processing / Data storing]

4. Director ----opMempry:
"Please give me the data!"
5. Memory

Data outputj

–lb-Director:

X,Y slides have to be moved in ratio
1 : 4.
In the computer nothing happens without
the director. There is a strict
hierarchy.
What

happens

1. Secretary

if you press the key START?

6. Director calculates and gives data
to chief operator. With the aid of
the watch he also determines the operating speed (when threading he
waits for the main spindle position).

1.Director:

"They pressed START!"
Director asks memory:
"Did they put in program end M30?"

7. Chief op erator ----III-Foreman:
Move X slide with feed size F1 and
Y slide with feed size F2.

If yes, the program can start.
2. Director ----ipSpecialists:
We want to machine a groove in a
certain angle.

4.4

8. Director ----Ili-Press speaker:
"The block is finished. We work on the
next. Let them know!"

What happens in CNC-manufacture?

What happens in CNC-Manufacture?
Digital read-out

Data Input

VI El a
fll
MI

Central processing
(Director)
Output element
(press speaker)

Interface element
(secretary)

1111.:
rneria
46.4r4k.
er (r)

-1;;;V ..00
:00"

Operating program =

CNC-Machine

Memory = RAM

utput element


What knowledge is necessary in order to manufacture, using a hand operated or a CNC lathe?

Hand operated machine

NC-machine

CNC machine - handoperated machine

Differences in Manufacture using a hand
operated or a CNC-Machine
(Survey)
Hand operated machine

Necessary information
Technical. drawing

Necessary means
Lathe

Chucking devices

V

Tools

Necessary knowledge/Capabilities
(to execute operation;

Reading 3f technical drawings

Knowledge abo..it tocl. geometry

CNC machine - handoperated machine

Differences in manufacture, using a hand operated
or a CNC-machine - continued

and operated machine

NC-machine

Technological information
+ Cutting speed depending on
- material of workpiece
- tool (HSS, carbide tipped)
type of operation

+ Feed rate
+

Cutting depth

* Performance and. dimensions
of machine

Execution

Operator must know how
to control the machine

Writing the NC-program
•

1-,_I
.

a

.

1
.
-1-- +

-.

I-

!

•

J.

.

-

i

•

J.2:

4...

--,-•

_,__

!

j

•
.:

Remarks

F.---1.-

—

— -•-

••

____A
--J.

1

E
i
• -. i-...---r

-

-• ±- •

-

,.i___

1

.,

.._

.-It

■-.-

-I-

+ Input of NC-program

+ Preparing the machine
+ Execution

!

1
.1

This you are going to learn
A rough survey
Set up a CNC-program
Enter all informations into program
sheet.
Rules how to write these datd have
to be learned.

Put in program
You have to put in the information
into the control. The control stores
the information. You have to follow
certain rules.

V

Give instruction to manufacture
The control works with the information entered - it calculates and
gives instructions to the machine
tool.

Check result
Correct program
Improve (optimize)
program.

411

Programming

What is Programming?
Prog ramming means to feed the computer
with such data which it understands.
In other words, we have to "spoon-feed'
the computer, List the data in orderly
sequence and in a Language which is fami;_iar to the computer, which it understands, so that it can process the information.

The operator does not understand the
Chinese commands, because he does not
speak this language.

The CNC-machine does not understand the
human language.

We have to feed the CNC-machine with
data in a language it will understand.
This language is "encoded".

Do you already know programming?

It you have operated a machine tool you
automatically carried out the right
movements.
Your brain gave instruction to your
hands to operate the switches and :,evers in the correct sequence.
This lob was automized to a large extent.
When programming you have to wrice down
all instructions.

The instructions and informations
must be
- in a systematic sequence
- complete
- and accurate.
They are given to the CNC-machine in
a coded form.
4.15

Coding

The Coding Standards
The program structure for numerically
controlled machine tools:
The program structure for numerically controlled machine tools:
How to code informations and instructions
is defined by standards.

The standards are:
- Program structure for numerically controlled machine tools.
- According to DIN 66o25 (German Industrial Standards)
- According to'ISO 1056 (International
Standard), new edition ISO 6983.

HOVE LONGITUDINAL SLIDE 410mIn TO THE LEFT 200nint/min
111111111111•0
411111111.1116

N.— /601 /x+40

F2011

The coding rules must be learned by you

so that you can write the program for
the manufacture.

Coding

The Coding of informations and Instructions
(Criteria)
One cculd build a computer . which coderstands instructlons Ln normal. language.
This would bring about qu to some disadvantaces:

Language information

:Criteria

Move the longitudinal slide
- main spindle being switched
on - with a civen feed a
distance of 25 mm at an angle

1 It would be necessary to
build -a computer for
each language (or even
for each sLang)
The long instructions
are complicated and
vague.
:3 The language is practice
oriented. This should
also be true for CNC-instructions.
4 The code should be applicable to many different machine types.

• Demands for -toding

- Language neutral

Simple coding
Clear expression

- Practice-oriented

- Universally applicable

When setting up standards for the program
structure of CNC-machines the aim of the
many experts was to create codes for instruction which should be
-

as short as possible
simple
language neutral
practice-oriented
applicable to all machines.

Program structure

Program Structure
Coding of the movements
Introduction of the Carthesian Coordinates
System.

Write down the instruction which you
would have to give for milling. The
milling spindle is on.
Number the instructions consecutively.

VERTICAL SLIDE

CROSS SLIDE

Coding of slide movements

The Instructions
, Move the vertical slide downwards

The movements are described using the
axis denomination of the Carthesian
Coordinates System.

(15 mm )

For vertical mills

Move the longitudinal slide to the
left '50 mm)

X-movement: longitudinal slide
Y-movement: cross slide
Z-movement: vertically

:3 Move the cross slide forward (30 mm)
are neither short nor language-neutral
nor simple.

Instruction on direction
is achieved using ± sign.

Coded instructions
-Z
2

3

15 mm
50 mm

-Y

30 mm

4.23

GOO/G01

The movement 1 is different to movements
2 and 3,

Movements 2 and 3

Movement 1

StraLght movement and chit removal

No chip removal
Feed rate has to be set (depending on
cutter dia., raw material, depth of
cut etc.).

Speed as large as possible.

Coding:

Coding

Rapid traverse = GOO

Linear interpolation = GO1

N

X
II

_ .

(J)

;0)

(K)

Y

{S)

.. _
'"

0
• . .
•

00
0

5a0

•

3000

1

0

r01611 1.1011V1111.0

Description of Path Lengths for
Slide Movements
Also in this case simple arrangements
are made. The statement 'mm'
meter) is left out. Only the number is
written.
X -45,325 means: traverse -45,325 mm
in X-direction.

On the F1-CNC path lengths are pro•
grammed without decimal point in
1/100 mm or 1/1000 inch.
Thus, 23,25 mm is programmed 2325 and
1,253 inch is programmed 1253.

Sign
Measures without signs are automaticaJly "+" measures.

The Program Sheet
All informations and instructions are
entered into the program sheet. Further
explanations on the following page.

N

G
(M)

Y

X
(J)

fp)

(K)

(S)

a

00

F
m

OA)

remarks

4 27

External construction

The CNC-Program (structure)
The program is wrLtten down in the pro. gram manuscript.

Y
(K) (S)

G
(M)

(J)

00

Do

-3

0
2
03
04

•
•
•
►

2 00o

OS

ra

z

0

X.
(0)

N

C
0

r

on

- 2 Soo

0

F

(L) (T) (H)

420
120

r

oso

0

-

100

'168o

120
12o

2000
5So

1S-0o

The program manuscript
All essential data for the manufacture
of a workpiece are filled in.
The composition of this program is
called programming.
The structure of such a program is
standardized.

Parts of a program

N

(_,

V

X

(MI

;.-I}

oc

;.0

-3 000

01
0:.

2i
Di

10 So

(5

N1

(K)

I

•

•

F
(L)(T) (H)

o

- 2 COO

_0

42o

o
68o

0
400

12 0

Y
•.K. (S)

T

•

0

-

X
IJ)

ISI

C

0

03 ,_ Q')

N

ID)

!DI

120

F
(L) m 0-

fP

o

P. 1_,_Qt
01

10S7

0

- 3 00

00

02

0

- 2 .5- oo

0

1

o

0

42o

'0

1. The block
The program consists of blocks. A block
contains all data necessary to execute
order: move longituan operation
dinal sl.'_de straight or. 25 mm, speed
120 mm/min).

2. The words
Each. block consists of various words.
Each word consists of a letter and a
combination of numbers, e.g. N01.

42D

words
3. The word

G 01
Address

Combination
of numbers

A word consists of a letter and a combination of numbers. The letter is
called address.

The Address Words of the Program Sheet/Fl -CNC

X

G
(M)

N

1J) (0)

III

G
CO )

N

G
(M)

(J)

N

G
(M)

X
(J) SD)

)
(M)

(J;

N

1

.

x
(J)

X

X

(K)

Y

IS)

Y
(D)

(0)

DI

(K)

(K)

(K)

Y

Y

F
(1) IT) (H)

Z

(K)

Y

Z

(5)

(9) .

(5)

f
(1.) (T) (14)

Z

F
6.14THFI)

Z

F
(1-1 .r-) (H).

Z

F
IL) (T) (H)

1. The N-address:
N = abbreviation of number
The instructions and informations are
numbered. We talk about block number.
On the Fl-CNC: N000 up to N221.

2. The G-address:
Into this column we enter the key information, i.e. the 0-function or preparatory function. You will get to
know the various G-functions in the
course of our exercises.
3. The X,Y,Z-addresses:
They are the columns for the path data.
F1-CNC:
The paths are programmed without.decimal point in 1/100 mm and/or 1/1000".

4. The F-address:
F stands for "feed". For each chip removal movement the appropriate feed has
to be programmed.
F1-CNC:
The feed is programmed in mm/min or 1/10
inch/min.

5. The M-address:
M stands for "miscellaneous".
M-functions are called "auxiliary functions". The M-values are entered into
the 0-column.

4.31

External construction

N

N

N

N

N

.G
( M)

G

(M)

G
(M)

G
(M)

G
(M)

I..1)

(J)

X
(D)

(D)

(K)

(D)

X

(K)

(K)

X
(J)

X
(D)

(J)

(J)

X

(D)

(K)

(K)

IS)

'X

Y

Y

Y

(S)

(S)

(S)

(S)

Z

Z

Z

z

Z

F
(L) (T) (H)

F
(1) (T) (H)

F
I.) Cr) (H)

F
L) (T) (H)

F
L.) (T) (H)

6. The D-address:
The cutter radius is described ander D.
Radius 5 mm--4,-D 500 (compare M06 Tool
compensation).

7. The S-address:
S stands for speed.
2000 rpm---S 2000 (compare M06)-

3. The T-address:
T stands ±or tool.
Tool number 2--0-T02 cornpare tooi. lengths
:7.ompensation).

9. The 0,K-addresses:
3,K are parameters for circle oroqramniF,g.
These addresses are described in chapter
G02/G0.3.

10. The L-address:
is a jump address; compare G2.5, G27.

MAIM al awcy

Standardization of Axis Systems for CNC-Machines
The axis systems are standardized for the
various types of machinery according to
ISO 841 and DIN 66217. The basis is the
Carthesian Coordinates System (clockwise).
The right-hand rule can be . of quite some
help: it shows the position of the axes
to one another.

Making Programming Easier
Mix-ups are quite common when programming X,Y,Z and the +/- directions.
So even quite experienced programmers
use auxiliary devices. Use the model_
of the coordinates system and you will
commit less mistakes.

IF)

Axis systems

Axis System Milling Machines
Milling machines and machining centers are
of different construction typologie.

Example:
Vertical mill type 1
Milling head with tool moves.
The mounted workpiece carries out longitudinal and cross movements.

11111111"*'411111
Vertical mill type 2
Milling head with cutter is fixed.
The mounted workpiece carries out lo • gitudinal; cross and vertical movements.

Jr11,11.11.0 vsy /011•■■• • 1.0

Description of Cutter Path
If you would have to directly describe the
slide movements, it would need a continuous
rethinking with the various different machine
construction types.
Example: Drilling a hole
Type. 1: Move milling head downwards.
Type 2: Move vertical slide upwards.
A confusing situation.

Thus, the important simple statement
for CNC-machines!
The path of the cutter is described.
For the programming it is all the same, whether
the slides or the tool move during manufacture.

4 39

Axis systems

Axis System
Vertical Mills

Axis system
Horizontal mills

Milling programs on vertical or horizontal mills are different. The Zaxis is always the main spindle axis.
A minus Z-movement is always a feedin movement into the workpiece (e.g.
drilling).

Program sTruciure

Concept of Programming - Methods of Programming
Basically there are two methods to describe the path: absolute or incremertal_

The path infora:itiori is ,Iveh fr-:i a
zero reference point..

Each point (place) is the reference
point (place) for the following measurements.

A Aq

Dimensions of Drawings
There are different types of dimensioning
in technical drawings.

Incremental dimensioning

Absolute dimensioning

Starting point for the dimensioning of
the next point is always the actual.
point which was described last.

Zero-point for the dimensioning of ail
points is a remaining fixed point.

A

O

1

LIO

15

Mixed dimensioning
In most technical drawings you find both
types of dimensioning. Some measures are
given from one common point (absolute) or
in the incremental mode (from the actual
point described last).

or)

15

63

144IJ*4J1 (Vii t ono vo Ile.oa. • Imam

The Modes of Programming
rt

was the aim to achieve a very simple
description of the traverse movements.
You can program the points and traverse
movements in two different modes - so to
avoid changing of dimensions in the
drawing.

To instruct the computer how to calculate the values it is necessary to give
a. key information.
This is achieved by a G-instruction.

G91

G90
-

- Absolute mode description
- Absolute mode programming (reference
point programming)

- Incremental mode programming

N

N

X
(M)

(D)

z

Incremental mode description

(M)

X
(J) (D)

Y

(S)

z

fi){T)(H)

(L) (T) (H)

- You describe point 1 starting from
point 0.

- You start from one point and describe
all other points.
- The zero-point of the coordinates system can be defined by you.

— You describe point 2 starting from
point 1.
- You describe point 3 starting from
point 2, etc.
You have to imagine the coordinates system shifted into the relative point.

4.47

G901G91

When do you have to give the G90/G91 information
to the computer?
The initial status of a CNC-machine
••■••••■■••■••■•

When you switch on the main switch the
machine is in mode of operation "hand
operation" = initial status.

N G X YZ F

ooarroo
D.J K L.7 M
j

7 8 9{
4 5
6.ra

:INP

0

If you press the IVCIkey, the mode of
operation is switched to 'CNC-operation".

H/C

M
Ft-4

The "initial status" of the control is
incremental. All traverse movements
are calculated in incremental mode.

G90 — Absolute value programming

G91 — Incremental value programming

G90 has to be programmed.

You may program G9I, however it is not.
necessary since the control calculates
incrementally by itself.

111

(J) X ( 0 )

NY (S)

1111 MC;

(H)

N

G
(M)

X
(•4

(0)

Y
(K)

(S)

z

F
(L) (T) (H)

Q34

111.

NM=

BB

VIM erns 111 fa L

111
MO

1
I-

G90 is a self-maintaining modal function.
It is valid until it is revoked, i.e.
until G91 is programmed.

4 trOKrewentat

I
P

.Cloict-i-t2
11--

G91 is a self-maintaining modal function.
G91 is revoked by G90.

411015414!ge,

Exercise

Exercise

Exercise

Describe points P1, P2, P3, P4, P5
as absolute data.

Describe points PI, P2, P3, P4, P5
as incremental data.

Write in block N000 the information for
the mode of programming.

N

IM)

X
(.1) (0)

(K) (S)

z

(1-)(T)(

II

X
N
(J1 (0)

II

Y

ME
(K)

15)

Z

F
0..)11

4.51

Workpiece zero-point

Determining the Coordinates for Programming
in Absolute Mode

Determining the Workpiece zero-point in
the technical drawing
In technical drawings the measures are
often taken from one reference point.
For programming it is convenient that
as many measures as possible can be
taken over from the drawing - without
calculation work.
You as programmer can determine the
zero-point of the workpiece. The ideal
choice can best be seen in the workpiece drawing.

Symbol

Short
description

wornpieue ici

WWwit u

- Where to set the workpiece zero-ooint
is your own decision.
- Pay attention to the signs

of the axis.

- Write axis signs and ± signs in t:_ne
drawings not described.

f

4 flflA

a

The origin of the coordinates system'can
be positioned in any point.
Points may be positioned in any of the 8
squares.
Describe the points in absolute and incremental mode.

X - Y plane = Underneath side of workpiece

Incremental

Absolute

N

z

(L) (t) (N)

YV VI

1Wir

Ur

14-1.0%,11 I R

X - Y Plane in Center of Body

incremental

Absolute
N

0
(M)

(J) (D)

(K)

Y

(S)

(L) M (H)

F
M (H)

4 :qin


Informations to the Control concerning
the Workpiece zero-point
You. can instruct the control with G90/
-G91 how it should calculate the movements - in absolute or incremental mode.

Absolute value programming
Where is the origin of the coordinates
system situated?

The control unit of a CNC-machine can
neither see nor think.
- It does not know the position of the
work.piece mounted to the slide.
- It cannot read the technical drawing
and thus cannot know the position of
the workpiece zero-point chosen by
you.

CNC-solution:
We have to instruct the control where
we want the origin of coordinates.

IrsorKpluutt zero-point

Fixing the Origin of the Coordinates on the Fl -CNC
(Workpiece zero-point)
w
Possibility 1:
Fixing with G90
If the computer receives a G90 instruction in the course of the program, it
considers the actual slides position
as zero-point.
In the left side mentioned situation you.
could not take any workpiece measures
from the drawing. You would have to
calculate.
This is only useful if you shift the
origin of the coordinates system to
the workpiece zero-point.

Example:
You move the cutter to the zero-point
chosen by you. If the cutter is in
this position you program G90. The origin of the coordinates is set.

A

G92

Fixing the Zero-point of Coordinates with G92
G92 - Programmed offset of reference point

- We have set the workpiece zero-point,

- The cutter position is known to you
(distance workpiece zero-point to
cutter).

Information to computer with G92
You describe the cutter position looked
at from the workpiece zero-point. In
this way you fix the workpiece zeropoint selected by you.

Attention:
Format G92
N3/G921X ± 5/Y ± 4/Z ± 5
(vett kal)
N3/G92/X ±4/X ± 5/Z + 5
(horizontal)

- G92 is an information, no instruction
to traverse,
- G92 means automatically absolute

value programming.
- The zero-point of the workpiece can be
set off with G92 within a program as
often as wanted.

Exercises

Program the workpiece tero-point
Program. the tool to the workpiece zeropoint.

N

N

X

G
(M)

G
IN}

I

-•-

4-

'1'

(D)

ti)

(K)

Z

f

X

j"(

..,t1i

-1-•

(S)

j

i

X

i S)

Z

F
'Li 0":i (F11

F
f t..) IT)

(HI

4

I
--.I--

1

4.63

G92

Exercises
Program the worispiece zero-point

Program the indicated traverse paths.

G
(M)

N

(J1

Y

X
(0)

(K)

1S)

2

F.
(L)(T)l-i
i1

-1--

i_.,

.

Be

Exercises
Program the worIcp iece zero-oint

Program the :ndicated traverse paths.

4.67

G92

Exercises
Program the workpiece zero-point

Program the indicated traverse paths.

G
(N)

1111111111
MN
11111111
0
111111.11
lill

X
(J) (D)

Y
(K) (S)

Z

F
(L) I T ) (H)

11

MI
111

Various Workpiece Zero-Points in one Program

Wi : G92 / x -,2A0o 1
Wy :

/ 2. 1700
x -$700 / y -2600/ z 3500
y aQ

Example:
By a new programming of the workpiece
zero-point the previous workpiece zeropoint is cancelled.

- W1 Ls programmed. Plane 1 is worked
on.
- Traverse cutter to starting position,

Sometimes it is easier for the programming to set various workpiece zeropoints within one program.

- W2 is programmed. Plane 2 is worked
on.

Note:
In mose cases it is best to program the
reference point offset from one and the
same point so that the program stays
distinct.

4:71

G92

Exercises
Program the zero-points and the paths
indicated.

Mixed Programming
You may change also within one and the
same program the programming mode from
absolute to incremental. and vice-versa.

0
4.75

Mixed programming

Programming of the originally
fixed workpiece zero-point

If you want to fix the originally programmed workpiece zero-point you have
to either
• move the tool into the original workpiece zero-point and then program
G90
or
• describe from the original workpiece
zero-point the actual cutter position.

WI 40 iftr! r

■•■

r

Connection:
G92 - Zero-point offset

M06

G92

The fa information is an incremental target information within an independent coordinates system.

With G92 you fix the origin of the coordinates system.

4.79

Example

4. Setting up the program:
Carry out offsetting of workpiece 2 hzero-point

Manufacture
1. Mounting the workpiece

We assume that you have to manufacture
a few workpieces of same shape. You
mount the workpiece such that it is always in the same position on the ma chine table.
- The machine vice is clamped.
- In Y-- direction the workpiece remains
always in same position because of
the unmovable jaw.
- In X-direction by a stop,
- In 2-direction by identical spacers.
2. You scratch the three reference surfaces and move the tool to the program start point (= program end

point, = tool change point).

Some tips for procedure

1. Determining the workpiece zero-point
in the drawing:
You can see in your workpiece drawing
what the best position for the work-

piece zero-point will be. You determine
the workpiece zero-point in your drawing.

2. Determining the starting point of
the program.

I

.

dke..-

,

I

•

'

'

■gt.....:.or... Zii.r■••

I

....../ .,
,
■

f
I

,

1

_*

;,T,

L? a.i
.. ' .
.

.

1.

(

!

f'•

!

.

id

I

n

I
)

'
1

11

d

4a

= 7:

20

into a data sheet if more tools are

go

used.

F
t

0,}
44v0

Hz

0

t

o

5
2a00

16

3. Measuring of tools - Putting in data

8
2000

430 1-320

HZK .

4.81

M-Functions

The Miscellaneous or Switching Functions
M-Functions
Switching operations are programmable too on
CNC-machines. The M-address is used to program
chem. The word for the miscellaneous functions
contains a 2-digit key number.

Extract from codes for miscellaneous functions
(DIN 66025, part 2)

1-Miscell i
Haneous •

! Miscell
aneous

Meaning

Function

M04

M10

Programmed stop
1

MO2
MO3

Meaning

Function

MOO
MO1

I

1

Mu ,
r M1

Optional (planned) stop
End of program

1

Spindle clockwise
Spindle counterclockwise

! Clamp

-1

1

Unclamp .

: M30

End of program

Oriented spindle stop

I
Interlock bypas s

M3
M31

MO5

Spindle off

M48

MO6

Tool change

M49

MO7

! Coolant, no. 2 ON

msa

Constant speed oh

I MOB

Coolant no, 1 ON

M59

Constant. speed off

Coolant off

M60

MO9

I

Workpiece change

All key numbers not mentioned are temporarily
or permanently available. The manufacturer
of the control can assign the key numbers to
a given function.

--1

M-Functions

Miscellaneous or Switching Functions
on the F1-CNC

INN

X (J D)

EMI
SIM

V (K,S)

N G XYZ F
0000►00
D,JK LT M

Programming
The M key numbers are entered into the
G-colmn.
So if there is a M-key number to be entered always add the letter M.

0
Input of M-values
Press M-key then put in number value.

-/14 Lti
F

M-Functions in standard version on
F1-CNC
MOO - Programmed stop
M30 - Program end with re-set
Tool data
Tool change
M17 - Jump back instruction
M99 - Circle parameter

M-Functions with the 0NC-interface
(accessory)
M03 - Spindle clockwise
Spindle counterclockwise
MO5

MO8
MO9
M2 9

7

i

L_

M29
M22
M23 J

For details compare chapter 7

Freely available M - functions

Description of Block Formats

•

Depending on the G-functions you have to
program different. addresses (enter. values
for N,X,Y.,Z,F,M,T,D,S,L,J,K into the columns):
For a better overview the single prescriptions are abbreviated.

1. You need a block number N
This block number can be 3-digit.
Abbreviation: N3
2. The G--address
The G-address has two decades; it determines which addresses have to be programmed.
3. X,Y,Z-addresses
X,Y,Z addresses may have
Vertical milling machine:
X ±5, Y t 4, Zt5
Horizontal milling machine
Yt 5, Z±4 )

±

signs.

4. F-address (feed)
3 digits, therefore T3
5. 3,K-addresses (circle parameter)
2 digits, therefore J2, K2
6. M-address (auxiliary function)
2 digits, therefore M2
7. T-address (tool number)
3 digits, therefore T3
8. D-address (cutter radius)

5 digits, therefore D5

9. S-address (speed)

4 digits, therefore 54

10. L-address (jump)

3 digits, therefore L3

Example of a format description:
Format GOO
N3/G00/X

± 41Z ± -5

11. H-address (with M26)
3 digits, therefore H3

4.89

Types of controls

Types of Controls of CNC-Machine Tools

1. Point-to-Point Control
- The tool can move onyl from point to
point.
- The speed of the tool movement is not
registered.
- The tool path from point to point is
not prescribed. Only the final position has to be correct.
Application:
Drilling machines, spot welding machines
Today rather seldom in use, because most
controls offer straight line or contoura.ng characteristics at the same price,

2. Straight Line Control
The tool moves with
- given speed
axis parallel.
During the. traverse movement milling is
possible.
With milling machines either
- the longitudinal slide or
- the cross slide or
- vertical sl od moves, but never two
sl i des together!
Application:
Today hardly in use anymore; replaced by
contouring control.

ypes OT commis

3. Contouring Control
Various axes traverse simultaneously
with a programmed feed speed on a prescribed path. The movement can be a
straight line or circular movement.
Nearly all CNC-machine tools are today
equipped with a contouring control.

Types of Contouring Controls

a) Two-Axes Contouring Control
(2D control; 2D means two-dimensional)
Application:
Lathes, simple milling machines, erosion
machines, drawing machines, punch presses, etc.)

tr

A C1°1

Types of controls

b) Two and a half Axes contouring Control
Three times 2 axes can be moved simultaneously with programmed feed speed
and this on a prescribed path.
The illustrations are there to show you
what is meant by three times 2 axes.
Application:
Milling machines, machining centers,
flame cutting machines, etc.

I

yldwo

vI %elm', s.r

c) Three-Axes Contouring Control
(3D control)
All three axes can traverse simultaneously on a prescribed path with programmed feed speed.
Application:
Milling machines for the production of
complex three-dimensional workpieces.
If you traverse in three axes simultaneously you need special milling cutters (round head cutters etc.).

Note:
There are misunderstandings caused by
commonly used technical terms.
A milling machine features 3 directions
of movements:
- longitudinal slide movement
- cross slide movement
- vertical movement (up and down)
This is called a 3-axes machine. However, this does not imply that the machine Is equipped with a 3D contouring
control (3-axes contouring control).

4.97

Programming - Geometry
— The center point path of the cutter
- influence of the cutter radius
— Trigonometry of the right triangle
— CNC conformal lettering, calculation
of missing coordinates
— Transitions straight line - circular
arc tangent
— Calculations of auxiliary points
Straight line
Circular arc tangent

Description of the cutter path
We describe the center point path of the
cutter (except G72, G4S-G46)

influence of the cutter radius:
When milling contours the cutter diameter
determines the programming of the cutter
path.

Auxiliary points:
When programming the center points of the
cutter path the target points are called
auxiliary points.

7

When manufacturing axis-parallel contours the cutter radius has to be
added to or subtracted from the contour.

With non-axis parallel contours, auxiliary points have to be calculated. For
this the trigonometric functions of the
right triangle will do.

In quite some cases the coordinates of
crossing points have to be calculated
because they are not indicated in common technical drawings.
Missing coordinates are calculated on
the basis of trigonometric functions.

1 i IVY" 14J1.111,G,II

Survey
Trigonometric functions in the right triangle
Specification:
The right angle (90°) is characterized
with the symbol

L.

Both angles oe, (Alpha) and ( (Beta)
are in sum 90°.

Hypotenuse

cc,

/3 =

a)

3o°

Hypotenuse:
Opposite side of right angle.
Abbreviation: BY
Adjacent side (AS), opposite side (OS):
Each angle ae, and /3 has .a adjacent
side and a opposite side.
Adjacent side = adjacent side to angle
oc., or (1
Opposite side = opposite side to angle
or (3

GK
Sine = —
Hy

Cosine

a = c. sindsin

ck

=

a
--

C

a

c= .
sin

04.

b = c. cosct

AK
Hy

cos 4 –

GK
AK

tan al-,

C

cos c4,

C

Tangent –

a = b. tan
b–

04..•

a

tan 4

-14

Cotangent =

AK
—

GK

cot

b = a. cot
04,

=

a

a–

cot

0C.,

oc.,

4.105

Calculation of Coordinates

CNC-Conformal Lettering
The Calculation of Coordinates
In many cases the lettering of technical
drawings is such that the coordinates for
the CNC-programming have to be calculated.

Non CNC-conformal lettering

CNC-conformal lettering

k

Missing coordinates data can mostly be calculated using simple trigonometric functions.



Transitions: Axis-parallel straight
line — straight fine at angle
The Y-coordinate of point P 3 is not
known.

tg oc = Y (P P )
2 3)
3
20

'1 (P 2 P 3) = t"tg

•

X(P 2 P 3" e4 30°

300. 20 =

11,54 mm

Exercise:
Calculate the missing coordinate of
point P3.
Make a CNC-, conformal drawing.


Transition straight line - tangential arc

Coordinates of points P 2 , P 1 are not
known.

1. Calculate the X-coordinate of S
(crossing point between straight
line and slant plane)

tg tAr =

X
30

X = tg 30?30 = 17.32

2. Calculate the X-coordinate of P2.

••■•w.ii a. val

4.4•••■■

•r • ...a.our I VSSFIVIISAF,

3, Calculate the X- and. Y-coordinate
of point P-4.

SP 1 = 1!..55 mm
sin =

X
11.55

o
X = sin 30 .11.55 = 5.78 mm
cos oc =
-

11.55

= cos 30 11.55 = 10 mm

Letter all points in absolute and incremental mode

PC

Pi,

A111

Calculation of Auxiliary Points

Calculation of auxiliary points
Example 1
You program the path of the milling axis
Q0/Q1/Q2/Q3
Points Q i and Q 2 have to be calculated.

Cutter dia. 10 mm.

1. Calculate the Y-coordinate of point
P9.

tg 30° = YP2
30
YP2 = 304 30° = 17.32 mm

ualcularion or Auxiliary roinis

Example 1 (continued)

2. The path from Q0 to Q i is composed.
•
of
r + 20 mm + k

r+204-6X,

tg

Lk
04,1
=
2
—r

,A X/ = tg-y- •• r =

041

= tg lfi
-

1,34 mm

OK), = 26,34 mm

Coordinates: Q = Workpiece zero-point
Qo
Qo

x

Y

Q2

0

0

26,34

0

60

A 117



3. Calculation of YQ2
Y02 = 17,32 — C„ Y2
tg

4.2

6 Yg =

Y2
= r
4,2
ntg -72-- = 5.tg 30

= 2,87 mm
Y02 =

17.32-2,87
14.45 nun

Dimension the auxiliary points in absolute
and incremental mode. Fix the workplace
zero-point by yourself.

Exercise 1 (Calculation of auxiliary Points)
Calculate the A X and A Y values,

4.121


Exercise 1 (continued)

Dimension the auxiliary points in
absolute mode. Workpiece zero-point
as in drawing.


Exercise 1 (continued)

Dimension the auxiiiary points
incremental mcde.


Exercise 2

- Calculate the coordinate of point
P 3°
- Calculate the missing auxiliary
coordinates.
Cutter radius lo mm
- Pay, attention; angle0C2., is given as

interior angle (enclosed angle).

111

i-ilar••••....

•wr • m

Exercise 3

Program the exercise in absolute or incremental mode
Fix the workpiece zero-point and the
cutter radius yourself.

4.129


Example 2
Approach at angle
A big safety distance was selected intentionally!)

= 3o°

S

1

cc, 2 = 6o°
= Safety distance (10 mm)

Cutter radius (5 mm)

r

Calculation of point (21

1-Xi:
tg4,1 =
xi

Xi

= S
tg,t1

10

tg 30°

17;32 mm

2.A Xi:
tg

4,1
2
= tg

cr.

-- •
2

r = tg 15°.5 =
= 1,34 mm

3. Distance

Ir (PiQl) =

= 15 mm

%Jai Mt WI LP PA, rlo. OP .W.

r-••■• Assns y ■ vs, s air

Calculation of point 02

S2 = 20 ram
r = 5 mm
'14 2 = 600
1. Y2

tg^z=

Y2 —

Y2

tg4

2

20

—

tg 6°

—'11,55 mm

2.b Y2

tg

I: Y2

2
2

A Y2 =

tg

1. 2
2

r = 2.89 mm

Describe the coordinates from points
Q 1 , Q 2 in connection with P 1 , P2.

4 113


Auxiliary Points with acute
Angles

With acute angles you have to traverse
long no-load paths from target point A
to start point B.
That takes time. It may happen that the
slide movements are too short or there
is a collision with a chucking device
or you mill into a. workpiece part.

Two "short cuts" are common in
milling techniques

Traverse with various straight
lines.

Traverse with circular arc.

Traverse in circular arc

sin oc,?

Cos rx 2 —

A X 2 = sin

A2

/

Y?

2

r

/
= (..os oc 2 . r

4 137


Traverse in circular arc

Exercise:
Dimensior auxiliary points absolute
an incremental.
Program absolute and incremental.
Select workpiece zerc-point.
Program absolute and incremental.
Select workpiece zero-point.
P i P 2 = 40 mm
oc.2. = 300

Ind


Straight line movement


Traverse with various straight lines
Exercise:

Dimension absolute and incremental,

- Program the paths.
P 1 P 2 = 40 mm
oc 2

300

Chapter 5

Programming
The contents are arranged according to the
numbering of the G-functions
G90/G91/G92
G651G66

Compare chapter 4
Compare tape operation
RS-232 C operation
Chapter 10

Hints for the
Beginner
— Program start point
Program target point
Tool change point
— Potting the cutter path

The Start Point of the Program
The Tool Change Point
The End Point of the Program
Just imagine the sequence of operation:
the workpiece has to be mounted and
dismounted; tools will have to be
changed.
The start pointof the program should
be chosen so that ail handling can be
done without any obstacle.

The start point of the pkg.gram for the
tool shall always be the end point of
the program.
The tool change point shall be the start
.point of program for reason. of simplicity.'

Determination of Coordinates
Scratch or touch the reference surfaces
slightly and move the tool by hand to
the selected starting point.

Start Point for Chip Removal

Position the tool in a safety distance
to the workpiece. So you can find out
during a program run whether the tool
runs into the workpiece because of a
programming fault (with rapid traverse).
Safety approx. 2 mm

Auxiliary Drawings for Programming
As with the programming of turned pieces
also with the programming of milled pieces the technical drawing is a valuable
help. This is particularly true in the
beginning. It is easier to set up and
check the program.

/
N.P7

N 68

Turned pieces:
'-ts109

You draw and program the path of the
edge tip of the tool bit. The edge tip
is the part of the tool bit which produces the contour.
The tool bit movement is in one plane,
thus it is easier to depict.

Nil

Milted pieces:
Here you have to think and to draw in
three dimensions. This needs quite some
experience.
A three-dimensional depiction is very
distinct but not easy to do, Besides
that, all paths which are not parallel
to axis show shortened.

A separate drawing is a great help for
the first exercises.

An example:

1. Enter into a sketch the program
start point of the cutter.

2. If you firstly move in Z-direction
to the milling plane you can draw
in the workpiece and the cutter
path.

E
2.1. Mark the raw stock contour and
the finished part contour.

5.5

2.2. Draw in the cutter paths. Mark

the various auxiliary points.
Draw in the direction of movement.

2.3. Number the various blocks. The

checking of the program will be
much easier.

3. Blocks with no traverse movements
programmed can be assigned to the
auxiliary points.

4. With absolute programming draw in
zero-point of workpiece.•

GOO - Rapid Traverse
Straight line approach movement

Incremental programming

Absolute programming

AEICILUTE

880

x*8

y

311100

The target point is described from
the starting point of the cutter.

Wie/x4000/V4,4-scie

the previously fixed zero-point of
the coordinates system.

G00.3

GOO - Rapid Traverse
Ali movements are carried cut with
the highest possible speed, i.e.
rapid traverse (with the Fl-CNC:
600 mm/min).

- GOO is no chip removal movement but a
movement without milling cutter being
in action.

(i)

11111

X

(0)

(K)

Y

(S)

11111 F
(L) (1) (14)

=
MEM
MN
MOM=
ISM..
00

00

000

0

04

00

0

0

0

0r

0

S0

0

-

2 000
0

- No programming of feed (F) because
the slide moves with rapid traverse
when GOO is programmed.

03

I

Programming Exercises
In order to move the milling cutter to
its working position you have various
possibilities,

2

1. Traverse only in 1 axis
The two other axes are zero. - You have
six possibilities. Program all of them,
absolute and incremental,

4

2

3
3

I

2
04

a) Incremental Value Programming:
- The milling cutter is in the position
which is indicated in the drawing.
- It is moved to milling position with
GOO.

b) Absolute Value Programming:
- Milling cutter is moved to milling po-.
sition.
- Program the traverse paths

&GOO. 5

G01:17

2. Traverse In one block simultaneously in 2 axes
Program absolute and incremental. - The
zero•point of the z:::ordinate system for
the absolute proqramming is in point Pc.
Draw in the possibilities.

Question:
How many possibilities are given if
you move all three axes simultaneously?

U-6.711 I

GO1 - Straight Line interpolation
• Straight line cutting movement, feed
programming necessary.



X 25 mm
Z 18 mm

X 40 mm Z 5 mm
Y 32 mm

G01/X2500/Y1800/Z = 0/F ...

G01/X4000/Y3200/Z -500/F...

the starting point of the cutter.

the previously fixed zero-point of
the coordinates system.

R.rzni

5-G01

GO1 - Linear Interpolation
Linear means straicTht lined_ interpolat_ion
means the finding of intermediate values.
- GOI is a chip removal movement.
- With each chip removal movement you have
t.:7J program a feed.

Format GO1
N3/G01 /X• ± 5/Y ± 4/Z ± 5/F3

With GOl you can traverse parallel to axis
and at each angle in one plane.

5.(401

Examples GO1 (1)
Milling of a Shoulder
- Milling cutter dia. lo

ME

- Mode of programming: incremental.
- A shoulder with a width of 5 mm and
a depth of 4 mm has to be milled.

)

I

Li-)
5

5
(

50 )

-11.

1. Determining the starting point as
indicated.

2, Programming with GOO to the starting

point of chip removal. Choose a
safety distance of 5 mm.

5-G01

Example (1) (continued)
Determination of the Path for the
Milling Cutter
With a diameter- of the milling cutter of
lo mm and a width of the shoulder of
5 mm, the axis of the cutter is exactly
at the edge of the workpiece.

Programming:
Program end position is starting position.
N.

X

N

G
(M)

00
04

•0
Ia

0z

04

6 000

of

o

94
0S
•

i
it

a

(J)

(K)

(0)

2000
0

-S-00o
0
-30o0

,

IS)

Z

F
(I-) (T) fit

0
0
0
s-000

0
-3100
o
o

o

0

Zoo

0

2.00

-Coo*
o

2 to
20o

0
3 op

is M30

Exercise 2 for Example 1
- Program this example in absolute
values.
- Carry out a zero-point offset with
G92.
- Starting position and zero-point of
workpiece as in drawing.

5-G01

GO1 - Example 2
Milling a Groove

- Mode of programming: .incremental
- Dia. cf

milling cutter: lo mm

- Starting position as in drawing
- Depth of groove: 4 mm
- Feed (compare technological data)
- Safety distance before cutting; 3 mm

Pay attention:
When feeding in the cutter, halve the
feed values,

5-G01


I

Write the program according to the traverse paths as indicated,
4)

(J) X (D)

mori( u (f)

(H)

1.111EME11

111111.111E1

Program the example absolute with zeropoint offset,

ON

x

(J) (D)

Y
(K)

(S)

F
(L) (T) (H)

IIMIPM

ill=n1.

Choose other traverse paths for GOO.
N

G
(M)

X
(J) ( 0)

001 — Example 3
Milling a Pocket

- Milling cutter dia. lo mm.
- Starting position as in drawing
- Safety distance before cutting 5 mm

Choose the path of the milling cutter
such that there is always an overlap
of 1-2 mm (in industry approx. 1/10 of
the dia. of the cutter is chosen).

5-G01
Drawing the Path of the Milling Cutter
I

Dimensioning
An important support for your programming
work is an appropriate drawing.
Enter the block number
Mark begin and end of the block
- Use the largest possible scale when
drawing.
Dimension auxiliary measurements
Program this groove as in the drawing in absolute and incremental mode.

Programming sketch and dimensioning of
auxiliary measurements for absolute programming.

N

(M)

X
(J) (D)

(K) (S)

(L) IT) (HI

remarks

5-G01

Drawing the Path of the Milling Cutter
Dimensioning

Programming sketch and dimensioning of
auxiliary measurements for incremental
programming.

( 1-1(T) (H)

remarks

5-G01

Example 4

The milling path in example 3 would
leave the corners in the pocket unfinished.

With pocket milling you cut a rough
pocket first. With a final cut you
mill the complete contour once again
to reach a better surface quality.
Exercise:
- Program and mill the given pocket.
- As final run a continuous smooth cut
of 2 mm shall be taken off. Mode of
programming as you wish.
- Select the zero point of the workpiece yourself.

5-G01

Example 5/G01
Milling a Cross Slot of 45°
Diameter of milling cutter 8 mm.
Program the zero point of the workpiece
using absolute value programming..
Make a drawing and use reference dimensions!

D
0

/ /.

,

N

4111---

(50)

--40.

1. Start position: Milling
5 mm away from theoretical X-edge
5 mm away from theoretical Y--edge
2. Target position.;
As indicated (X 5 mm, Z 5 mm)

5.001

Example 6: Bores 4 x 90°

4

The center point coordinates of the bolt
circle are known.

+ The coordinates of the
bores have to be calculated.
sin d—

= R. lin 45° = 15.0,707 = 10,6
cos
X1

= R. cos 45° = 15.0,707 = 10,6

Since the bores are positioned symmetrically to the center point, you can
calculate the X,Y coordinates of the
other bores (by adding or subtracting).
Dimension the drawing for CNC-manufacture
- in absolute and incremental mode.
Program the example.

5-G01

Example 7:
Bores 6 x 60°

3

15

Bolt circle 6 x 600
- Calculate the coordinates of the bores.
- Dimension the part for CNC programming.
- Program example.


5-G01

Example 7:
Absolute programming and
lettering

0

Example 8: Hexagon

Use cutter die. 16 mm
1. You calculated the coordinates of
the corner points in one of•the
previous examples.
Transfer the values for points
to 6.
2. You have to calculate the auxiliary
coordinates of the cutter center
path.

val

010

Gal

Example 8:
Hexagon
You have to add respectively substract
the A X and radius values to the co-

ordinate values of points 1,2,3,4,5,6.
Calculation of

tg

L.

X—

tg

„,

Put in measurements for auxiliary points.
program the example!
Pay attention whether there is remaining material at the outer corners. If
yes, mill it off.

54iU2ASU3

The Milling of Circular Arcs

On conventional machine tools circular
arcs can be produced only using special
auxiliary devices. On CNC-machines circular arcs of any angle or radius can
be reached without such special devices.
The key information for circular arcs
is GO2 and G03.

GO2JG03, 3

G02 - Circular Interpolation Clockwise
G03 - Circular Interpolation Counterclockwise
In order to formulate what you mean by clockwise and counterc/ockwise,•we have to determine the direction from which we look at.

Determination
You have always to look at the sense of rotation in one plane from the positive direction
of the third axis.

Interpolation Clockwise G02

XY-Plane:
Cook from +7, direction
to -Z direction.

YZ-Plane:
Look from --)( to -X.

54302/UOU

Interpolation. G02 Clockwise
XZ-Plane:
Look from +'

to

In this technical sketch the direction
the la-plane seems to be inverted.

in

"nette-ines

GO2JG03. 5

Arcs on the PI-CNC Milling Machine
Metric

Inch

Size of radii 0,01. - 99,99 mm
in steps of 0,01 mm

Size of radii 0,001 - 3.999 Inch in
steps of 1/1000 inch

Programming
On the F1-CNC you can program
quarter arcs (90 ° ) or arcs of
circles in steps of 1°.

FA
°--**

G 02

Programming of arcs 90°
on the Fl-CNC
Pz(XYZ)

1. The sense of rotation is described
with 002/G03.
2. The end point of the quarter arc is
determined) by the X,Y,Z addresses
either starting from point PA (incremental) or from the workpiece zeropoint (absolute).
3. The F-address is used to describe the
feed.

1:3z (XYZ)
Format
O
f G2
N31 Go3X±5(±4)/Y ±4(±5)/Z±5/F3

±4 resp. t 5 with X,Y-values for vertical resp. horizontal axis system.

GO2JG03,

Programming of Quarter Arcs in the
XY-Plane
Format G02/G03
1G021 ± 51Y± 41Z =0 /F3
N31G031X

G02 incremental Programming
Example: radius 10 mm
Programmed are X,Y values looked at from the
starting point.

=El=
02

I

02
02
02.

•

Y
-1000
-1000
1000
+1000

1111
0
0
0
0

...

Arc
Arc
Arc
Arc

1
2
3

4

Attention:
In the XY-plane the Z-value has to be
programmed with zero.

cf.:noir:An

7

GO2JG03. 9
G02 - Absolute Programming

Zero-point of workpiece as indicated
in drawing.
You program the XY-coordinates of the
end point of quarter arc, looked at
from the previously fixed point (W).

+X

Note:
Arcs can be moved only in one plane.
Thus, the Z-value of the previous block
has to be taken over.
Block N0I/NO2: Move to start position
Block N7: Infeed in Z -100
Block N8/N9: Arcs 1,2 set deeper

G

X

Y

000

92

0

0

01

00

2000

2000

2

01

2000

2000

3

02

3000

1000

4

02

2000

5

02

1000

1000

0

6

02

2000

2000

0

7

01

2000

2000

-100

8

02

3000

1000

-100

9

02

2000

•

10

0

0

Z

F

1000
1000
.. ,

Position milling cutter at star t. G02

0
0

-100

Position milling cutter at sta: t GO2

LIU-4W. 11

Exercises

G03 - Incremental Programming
- Position of milling cutter at start
as indicated in drawing.
- Circle is in XY-plane
Z=0
- Start the circle programming in point
"0".
N

G

(M)

(J)

X

(0)

F

Z

(K) (S)

(L) (T) (H)

111.181.1

IlplarllIllE

G03 - Absolute Programming
- Position of milling cutter at start
as indicated in drawing.
- Carry out offset of zero point.
- Circle is parallel in XY-plane, but
at a distance Z 4-10 mm.
- Start the circle programming in
point "0".
X

Y

IIII

F

LaimEn
riames
Me

(J) (D)

(K) SS)

(L) (I) (H)

c e•nrslr_ fte)

44

G021G03. 13

Programming Exercise G02/G03
Mode of Programming: incremental
-

Approach direction as in drawing

-

Determine starting point yourself

-

Determine drawing with dimensioning
of triangulation .(station).

ct"

0

I
(50)

ilw

Approach direction as in drawing.

G02/G03, 15

Programming Exercise G02/G03

Alternative 1
Mode of Programming: absolute
-

Zero-point of workpiece as in drawirig,

-

Starting point of milling cutter as
in drawing.

-

Dia of milling cutter lc mm.

Alternative 2
-

Mode of programming: absolute

-

Zero-point of workpiece as in drawing

-

Starting point as in drawing,

G02.101 17

Y-Z Plane

Exercise
Mode of programming: incremental
- Circle in YZ-plane
- Start point as in drawing
.C3
f

X
(J) I D)

tK)

Y

[SI

4-

Exercise
Mode of

programming: absolute

Zero-point as in drawing
- Start point and end point for programming is workpiece zero-point.
N

'

1M)

X
(.•A (0)

(K) {S)

F
(l)(T)(H)1

tilIZRIU4. -1U

Circles X-Z Plane
Exercise
- Mode of programming: incremental
- Starting point as in drawing

i N4)

V

X
(J1 (D)

F
(S)

4

Exercise
- Mode of programming: absolute
- Zero-point as in drawing
- Starting point and end point for
programming is the zero-point.
N

G

M1

X
(J) (0)

(K) (S)

4

e nevlinfl e2 10

0021G03, 21

Some Terms for Circular interpolation G02/03

Complete circle programming
A circle up to 360° can be programmed
in one block.

Quadrants programming
A circle is divided into 4 quadrants.
In one block only one arc of max.
90° can be programmed. The arc of
circle has to be Within a given quadrant.

In this case two blocks are necessary
because the arc reaches over 2 quadrants.

Fl-CNC
Quadrants programming•
- To program a part of an arc within a
quadrant, a code in two blocks is
used.

Arcs with Angles at Random
On the F1-CNC arcs in steps of 10
each can be programmed. The programming
is done in various subsequent blocks.

(The following examples are in the XXplane; for all other planes this principle is valid too).
Radius 10 mm

First block
Here the 90° arc in which the
partial arc circle is situated will
be determined.

N100/G02/X1000/Y -1000/Z . . . /F . .
With G02 the computer is given infor•
mation on the sense of rotation.
With X 1000/Y -1000 the computer knows
the quadrant ( I sign of X,Y) and the
radius of the arc.

Next block
. N101/M99/..1 = 0/K =30
M99 is the key information for the
arc
90°.
Blocks N100/101 are considered by
the computer to be one unit. The
computer asks whether there is a
M99 instruction in the block following a 002/G03 instruction.

J-address: for the grades statement.
of the start of the arc •within the
quadrant.
K-address: target address of the arc.

Statement in grades.

g.nn9/ruln

9:1

G 02/G03. 25

Example
Incremental value programming
N100/G02/X1000/Y -1000/Z=0/F..
N:01/M99/J2-=/K67

Example
Incremental value programming
Arc of circle reaching over a few quadrants.
N100/002/X1000/Y1000/Z=0/F...
N101/M99/332/K90
Arc in quadrant I.
N102/G02/X1000/Y -1000/Z=0/F...,
Arc in quadrant II.
N103/G02/X -1000/Y -1000/Z=0/F..,
N104/M99/J=0/1(28
Arc in quadrant III.

Using the Chart
The chart shows you the 3,K-values, the
exact grades and the coordinates of points
for a circle with radius 1.

In order to program the cutter path it
is often necessary to calculate the
coordinates of the arc starting (PA)
and target point (P2). These points
are missing in many drawings.

(All examples are in the X,Y-plane,
the same principle is valid for all
other planes too)

Example:
X(a) and Y(b) coordinates of the target point (PZ) are not known.
Calculation a
a= R•i
1
cos 46.0l =
= R.ccs46.01
a =

10 - 6.945

= C.945.1!
=

3.0567

=

7.194

Calculation: b
sin 46-01
t =

=

These values can also be read from the
chart.

5-G021G 03.27

Circular Interpolation - Parameter
XYZ-Values at the Circle 1
F
,

J,K '

oJ

Grad
0

1
j

a

b

XYZ
0

XYZ

0

-1181 .I
0
1 1
347
0
2 I 1.98!
14
S 1 3.02 1
708
28
4 1 4.06
889. 1
43
5 11 5.10 1
56
1056
6 , 6.05
1222
69
7 ' 7.0/
1403
97
8 1 8.06 '
1569
9.03 1 125
9
1736
10 ! 9.99 i 153
I
1903
11 10.96 ' 181
2069
12 11.93 1 208
2250
13 12.99 1 250
2431
14 1 14.05 ; 292
2597
15 ; 15.03 ,1 333
2764
375
16 I 16.02
2931
17 1 17.02 1 431
18 ' 18.03 1 486
3264
19 19.03 1 542
3431
20 20.04 1 597
!
1
3583
653
31 1 20.97 /
3750
22 .
3917
23 I 23.04 : 792
4069
24 24 . 00 I 861
4222
25 I 24.96 1 931
26 I 25 . 9 2
1000
4375
4542
27 1 26.99 1 1083
4694
28 1 27.98 ' 1167
1250
4.347
29 1 28.98
5000
1333
30 ; 23.98
1
5153
31 1 30.97 ! 1417
5306.
1514
32 ! 32.01
5456
33 1 33.05 1 1611
5597
34 1 34.02 1 1708
5736
35 i 34.99 J' 1806
5875
36 35.96 11903
6014
37 1 36.33 1 2088
6153
38 1 37.95 1 2111
6292
39 1 38.97 / 2222
6431
233S
40 I 39.98
1
1
41 i 41.00 1 2444 ' 6569 '
6694
42 1 41.96 I 2556
6813
43 1 42,97 i 2631
6944
44 1 43.98 1 2886
70819
45 1 45.00 . 29S!
1.03

511111::

S097

22.00

;

722

a

1
;
J.K !
)

XYZ

Grad

,•
T

b

: XYZ

1
-4
46 46.01 I 3056 i 7194 1
47 I 47.02 : 3181 1 7319J
48 1 49.03
3906 ' 7444
7556
49i 48.99 1 3431
50 50.01 1 3569 s 7667 1
7778 I
.
51
7889 I
52 52.04 1 3847
8008
3986
53 53.06
54 54.03 i 4125 1 8087 I
4264 1 8194
55 , 55.00
4403
8292 i
56 55.97
4542
57 56.94
8389
8486 1
58 . 57.98 j 4694
8583
4847
59 , 59.02
8667
5000
60 60.01
8750
5153
61 : 61.01
5306 J 8833
62 1 62.01
8917
5458
63 I 6:3.00
9000
5825
64 I 64.07
5778
9069
65 I 65.03
1
9133
66 I 65.39 I 5931
67 1 66.95 ; 6083 : 9208
6250 I 9278
68 ; 67.99
9347
6417
68 1 68.82
6569 1 9403 1
70 1 69.95
9458 :1
71 1 70.96 r 6736
72 ' 71.96 ! 6903 : 3514 :
7:3 72.97 , 7069
9569
74 73.97
7236 1, 9625
9667
75 74.96
7403
7569 1 9708
76 75.94
77 77,00 , 750 • 9750 .
78 73.06 , 7931 ; 9792 '
9819
79 73.03 i 8097
80 , 80.00 1 8364 ! 9847
9875 1
81 ; 80.96 r 8431
22 1 31.93 : 8397
9903 1
5931 1
83 1 82.98 8778
9944
84 1 83.94 I 8944
9111
9958 !
:35 ' 84.99
.
.
86 1 85.93 ; 9292i 9972 1
87 1 86.97 I 9472 1 9986 1
28 1 38.01 1 9653 10000
89 188.96 i 9813 10000
80 1 90.00 10000 10000
1
,.
1
L
51.02

1

378 8

"J1

In the charts the a,b values are indicated
far the standard circle in 4 digits.

IS
17

16.02

17,02

13
19

2e

18.08
19.03
20.04

21
22
23
24
25.

20.97
22,00.
23.04
24.00
24.96

26
27

29..32
26.99
27.98
28.98
2q.9R

28
29

le

Example

2764

375
431
486
542
597

2931
3097
3264
3431

653
722
792
961

a-value: 0,0931 mm.
b-value: 0,4222 mm

:749:33
3750
3317
4069
4222

1000

4375
4942
4694
4847
5000

108

1167
1250
1223

30 ,97
32.0
33.05
34.02
34.9 q

14i71514
1611
I708.
1806

5153 !
53:06
5458
5597
5796

35.96
36
3 -7 • 36.93
:3:3,9
33
38.9'
40
39.98

130.2
2000
2111

52-79
6014

31
"::::2

33
34
35

41
42

41.0
41.96

44
45

4 7:..:.32
45,0c

Radius 1 mm
25 0(24,96)

!

6292 .
6431

2444

6569
6684 i
6816
6944
7:"1:-:-.7=, !

21:::21

2805
2931

,

a,b values with radius sizes

Example

2222
2:
--25

Values (a, b) for any
desired angle (random)

j

= qt."'
Radius
a = 0,2444 x
= 0,6369 x

mz:
=
=

valuc-•s must b p. pfogram.T;e:d
rcunding c±ff. •

Tb

a -11.

c

z1

G02/G03. 33

The statement of angles is always programmed from the quadrant start.
Thus, the a,b values may have X,Y and
Z characteristics.

Exercise:
Put in the a,b values of quadrants IV
and I.

Radius 10 mm

IV

I

Radius 27 mm
IV
a

j

Exercise:
Put in the coordinates fat PO, PA,
Pz and PE.
Radius AC, mm

Pe

P

Radioc 38 mm

5-G02/G03.35

G02/G03. 37

Programming of Arcs # 90° in absolute Mode

#y

For a better understanding some details
on the Fl-CNC computer:
In the memory (RAM) the 90° arcs (Quadrants) are stored with the block:
N.../G02/x=150o/Y-1000/z....

The computer knows
- sense of rotation (G02)
- position and size of the 90° arc
(statement of coordinates of end point
PE of 90° arc).
The starting coordinate Po of the 90°
arc is known to the computer from the
previous block.

In the computer, this quadrant is
divided into 90 steps of 1° each.

Manufacture of the 90° arc
The computer instruction is:
Traverse all 90 steps of the programmed
quadrant.

La ULF %ALPO. Ov

Programming of Arcs from 0° to

a * 90°

We instruct the computer to edit
only a part of the 90 steps -

This is done with the M99 information

J=0

to

K=30

Flow in the computer
N99/G01/X.0/Y= SOO/Z
NIGO/G02/X=1500/Y=1000/7
N101/M99/J=0/

1. The computer checks whether starting
and end coordinates of the 90° arc
are correct.
It compares the coordinates of blocks
N99 and N100
2. The computer asks whether there is a
M99 instruction in the following
block.

No

All 90 steps are edited

Yes

- It calculates ("theoretically") all steps
up to J.
- It edits traverse Instructions from J to K
- It calculates from K
to 90° without editing
instructions.

g .11

n 9m1 n 1

qa

G021G03, 41

Programming a # 0° to a = 90° in absolute Mode

I. Programming to point PA
NI00/G01/X616/Y468/Z....
2. Arc = 28° to 67°
2.1. Description of the 90° arc:
N101/G02/X1616/Y1468/Z....
The absolute coordinates of the quadrant
end point PE are described starting
from point PA.
By computation this is the end point of
the quarter arc.
XE = XA /R/
YE = YA t /R/
ZE = ZA
2.2. N102/M99/J28/K67

Flow of data in the computer Manufacture
1. The computer checks whether coor-

dinates of starting point PA and
quadrant end point PE are correct
(absolute).
2. M99 instruction exists.
a) Computer proceeds up to J28
(= 280 ) - without traverse instruction,
b) It gives traverse instructions
from J28 to K67 (28°-67°). The
impulses from J28 to K67 are
worked through. The indicated
quadrant is manufactured from starting point PA to target point PZ.

GOVG03. 43

A Method of programming Arcs a

90° (absolute)

With partial arcs GC # 90° it is often necessary to calculate starting and target
point of the previous and the following
blocks: thus it is useful to establish a
chart.

Specification:
PA - Starting point of partial arc of
circle
PZ - Target point of partial arc of
circle
PE - End point of quadrant ("theoreti-'
cal" target point)
PO - Starting point of quarter arc.

Examples:

%A %Orme •...1,61.‘lw

Coordinates

PA: PA is the target point of the lolock
before the circle .programming
XA
YA
ZA

4 1)

PE: "Theoretical" end point of the
quarter arc
XE = XA + R
YE = YA + R
ZE = ZA (interpolation in the pane)

+X

PZ: Programmed target point
XZ = XA

+

P

X

YZ = YA

+ L1

Y

ZZ = ZA (interpolation in the plane)

+X

Coordinates path of the_partial radius
X = XPZ - XPA
Y = YPZ - YPA

A Z = 0 (interpolation in the plane)

P0: Theoretical starting point of the
quarter arc
X0 = XA - a
YO = YA b
ZO = ZA
5-G 021G03. 45

G021G03. 47

Exercise:
Put in X,Y-values, Z-value = 0
Y

X

PA

PE

Pz

+X

Po

L

Program the path
W-PA.,Pz-P1

Z

G02/G03. 49

Exercise:
Put in X,Y-vaiues f Z-value = 0
Program path
W -PA - Pz -P1

PA

z

X

PE

• Pz

Po
L

N

M}

WI ) 1")

(K) (S)

(L)

0.) (H) remarks

11

ea

• •••

aft A."

•

G02/001. 51

,

ism

Exercise:
Slot 3 mm deep

34'

Programming: in . absclute mode
Zero point of workpiece as in drawing.

air
XV

-a—

.4

4
27

im.

.50

st.

.Lit,14

G04 - Dwell

If you manufacture a borehole and withdraw the drill after you have reached
the desired depth, then the chip will
be torn off. The base of the borehole
has steps.
With boreholes of tapered shape this
often does not matter. With shouldered
boreholes, however, it can be disturbing.
The same applies for milling cutters of
larger diameter or for fly wheel cutter
if you move away suddenly.
You have an unwanted shoulder in the
workpiece.
;In such cases a dwell should be programmed.

Programming

The tool remains 0,5 seconds in
the programmed position of the previous block.

r "%AA 4

5•G21

G21 - Empty Line
You may program as many empty lines as
you wish in a program.
The empty lines are jumped over in the
program sequence.
In the place of empty lines you can
program at later stage other G- or auxiliary functions.

Subroutines
G25/M1 7
The subroutines are "managed" by the
main program.
In the main program the movements are
programmed up to the starting point
for the subroutines.

MAIN PROGRAM

At the end cf. a sabr--_:uLlri
structisn is given to
the main progr.,im.

tz..e in-

5-G25. 1

5-G25

Subroutines
It happens quite often that varlous
operations cf same shape :ire manufact,ired
at one and tne same workpiece.

Example
- 4 geometrically identical nocker.s.
- For the manufacture of each :'.00ket
the milling . cutter has to no move.-a
to working position.
- The programming and man1Lfactar1ng
process is the same for each individual pocket. You program in one
program pocket milling for 4 times.
These identical operations may be programmed just once and then "stored".
If they are needed they are called up

To our example
1. The tool is moved to the first miiihg start point.

----Start and endpoint of
subroutine

2. The subroutine is caned up. The
first pocket is being milled.
3. The tool is then moved to the second
milling start point.
4. Subroutine is caned up.

/

S. The tool is then moved te the thira
milling start point.
G. Subroutine is called
Subroutine

etc.

Principle: Call-up of Subroutine and
Sequence on Fl -CNC

MAIN PROGRAM

UP

UP:

6-G25

Subroutine-Programming
G25 Jump to Subroutine
Ml 7 Jump back to Main Program

1. Programming up to the first start of
the subroutine (assume NO5).

2. Call up subroutine G25 in block NO6t
N06/G25/1,100
- With G25 the subroutine is called
up,

NOO/G90

r---- NO6/G25/1,100
N07/GOO

N/M30

- Under. the F-address we describe the
block number with which the subroutipe begins.
In ' this case the subroutine begins
with block no. N100 (the block no.
is selected by the programmer).

3_ The subroutine:
N 100/
N101...
N102
N703...
N104 ,..
N105/G01
In the subroutine the operation to be
repeated is described (block N100 to
block NIOS)

1-4,--N100/G91

N105/G00
N106/M17

4. Jump back instruction M17!
At the end of a subroutine you have
the jump back instruction M17, The
program jumps to the following block
with which the subroutine was called
up.

Example

- Programming main program: absolute
- Programming subroutine: incremental
- Zero point of workpiece as in drawing
- Reference point set-off as in drawing
- Diameter of milling cutter 8 mm
Continue the program. Start point shall
be end point of program.
In block N05 the workpiece zero-point
is programmed again.

t4

G
IM)

X
(J)

(D)

00 92

MI
8

iY46
C
00
Is
92
30
25

900
900
34 o0

Y
(K)

(5)

a
5 2000
900
.900

900
900

F
I)-tir)(H)

3M0
r Of
0
3 ow
200
LSD
200
2.o0
t-5-0

50 9►

51 Of
2

0

0
0

53 Of

5-4 oi

700
0
-700

700

6$" Of

b

- 701

56 00

57 Hel

0

0

0

- 6 D0 TO
140
0
0
T 40
'44 0
0
-(40
.600

5-Ci25

More Subroutines
You can write as many subroutines In a
program as you like.

Example
The slots 1 + 2 are subroutine no. 1.
The slots 3 + 4 are subroutine no. 2
The program shows an incremental main
program.

N000

Subroutine -N005
instructions
N006 / G25. / LSO
N007

Jumps back

/GOO

N008 / G25 / L60
N009
NO10
NO11

/GOO
/

+111

G25 / L50
/GOO

NO12 / G25 / L60
C

0

0

N013

/GOO 'Of

N014

(/)

U

0
0

N... / M30
as
0

cn

--la

N050 / G
-4.-N051
-b-N052
Subroutine 1
-11-N053
-41-N054
-41-N055
-IwN056
M17 Jump back
instruction

4J

0

—N060
-0.14061
-1.-N062
-41.N063
-4-N064
-s-N065
-0-N066

Subroutine 2
M17 Jump back
instruction

0

9

(Hi (i)(i)

(S) (N)
A

N

(0g)

. . imilimbiI
a
r
CL

9

OE
1111111PriN
„v.

-

CO
9

buTTT7w io laaampTia -

.apow TrquamaxouT ul sauTqnoaqns

5TMJP

aoaTd)lom lo quTod o,zaz -

UT

.6uTm p zp

--qns7

t

UT

s p -luTod

.sauTqnoa
oa-rcINJom agq areJEload

aidwex3

c7n-c

8

111

5425

Part of a subroutine

You can also call up parts of subroutines.

An example:
- Slot 11) and slot (2) are icirti1
and contained in cross slot 3 and 4.
- You write a subroutine for slot
and 4.
N100/G91
N101/G01 to

N108
N109/M17
You can use block N105 to 106 for the
manufacture of slot 1 and 2.

It is possible to call up parts of a
subroutine.
In this example:
Block N105 to N109 / M17

6-G25

Part of a subroutine program
The scheme shows an incremental main program. In an absolute Main program you have
to determine the workpi.ece zero-point with
G92.
NCC

NO5 Milling cutter is positioned for subroutine
NOC.-

025

L100

N07 / GOO -4
4_1!

01
,--1 !

m'

Noe / G23 / L100
....s

c
--4

NO9 / G00
N10 / G:.
N11 / GOO.
G:5

.

it—

"W

i

L105
-NO

L10

•
•

—LØP r moo
N101
N102
=.=4

N103
N104
111111'

N105

S

N106
• N10:
N108
N109

M17

5.G25

Example G25/M17
•

Program this example:
Width of slot E. mm
Depth of slot 3 mm
Zero point of workpiece as in drawing
Decide yourself between absolute or
Lncremental value crogramming.
Scart point as in drawing.

lo

29
50

rye

x

WI

(DI

(X)

Y

(S)

MIMI
•1111•IN
111111111111M
IIIIIIIIIIIIININNIIII
r
11111MENIIIIIIIIIM
MINN
111111•111
IIIIIIIIIININIMIIIIIIIMI
III
MIMIIIIIII •

III
alErano

ammm=11W1111111111111
IIIIIIIMIIIIIIIIIIIIIIIIIIIIIIIIIIIM

Example:
You have to mill a rectangular slot.
Since the slot is deep you need a few
runs; these are identical in the XYplane.

Example:
- Miii cutter is al;eady cutting at block
-no. N005.
- NO06 is jump

subroutine.

- The subroutine consists of blook.Nloi
to N105.
- N105 )s -jump back to main program.
- NO07 is inreed in main program.
- N008 is jumc to subroutine.
etc.

5425
Exercise
Program the workpiece. The depth cf cut
be reached in 3 runs.

Jo
I
1

0.4

"cr

42
50

F
M (1-1) remarks

D-taZO

Exercise
- Make a sketch indicating the start
point.
- Determine. the zero point. Jii)
- Main program: absolute
- CirQuLar slot in 2 runs

Depth of slot 10 mm

(M)

25
(50)

(J)

x

(D)

(L) (1)

111
1111111111111
EMI

5-G25

The Nesting of Subroutines
CaIt-up – Sequence

MAIN PROGRAM

Nil

UI

Us

5-027

G27 - Jump Instruction
Format N31G27/L3

milliLW
IIMIIIIIE's
- ......
.....
G
IM)

N

X

(J) (D)

z

V

(K) IS)

F

(L) ( r) (H)

,,

..•,...= --dm

011
,20 omare,
......

.

With this in.str...icieri
backward
are

:

LiL

- :2-1-:, er the
rogramme'
the -,Drc.gram

.13,3 :ess
tc the
cc

E
'cicck
where

Example

1

3 :::ck IT
instrac.t;,cn to jump

Block 120
Instru:tin to _lump pack

NI

Application
N G
(M)

(J)

X

(0)

y

(K) (S)

11/

F
IL) MK

- You describe a finishing
to N12).

IEEE
L

f 5111111111•111111111

I
1

Ell

e

(M)

X
(J) (D)

Y
(K) (S)

Z

IE
MINN
11•11111
1111311131
4 11111111111111•11111111

rill

finishing program

p rogram

(N4

- In the block proceeding the f nisning
operation you program 021.

finishing program

um=
Eria.....
N

- The surface of the work p iece shall be
worked or not,

- In blocks N4 to N12 the finishing c71r.
is carried out.

F
(L) (T)(H)

Jump instruction
/3

111
WPM
MINIM
mita i io 1111.11
llEjl
IMIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
NMI

If the surface should remain unfinished:
Delete N3/G21
Program N3/G27/L13
The blocks N4 to N12 are skipped.

5-G40/G48

The Cutter Radius Compensation Parallel to Axis
G40 - Cancel the compensation
G45 - Add cutter radius
G46 - Deduct cutter radius
G47 - Add cutter radius twice
G48 - Deduct cutter radius twice

G45/G46/G47/G48 are self-maintaining
functions. They are revoked by G40
or M30 (program end). G45 can be overwritten by G46/G47/G46 and vice-versa.
Before programming G45/G46/G47/G4d
y ou have tc describe the too: data
under M06.

In examples up to now we have always
been programming the center line path
of the cutter. With the lengths to be
worked the cutter radii had to be
added or deducted.
This calculation work can be taken over
by the computer, if appropriate informations are given.

I +

2D

a4.2 14V1 41 4+0

G45 - Adding Milling Cutter Radius

Programming incremental
cutter shal touch the in
The
side of the contour.
Conventional programming:
N.../G00/X=1±rf
The radius has tID cc added to the length

I.

Programming with G45 (Adding Cutter Radius)

1113

IN

(J)

X

Y
(Di

D 500

(K)

F
(L.)11) (H)

(S)

S2. D O('

1. The computer has to .r.ow the cutter
radius so that it can. calculate the
correct movement (1
r).

0

ril

In one of the previous blocks the
tool data have to be describe, otherwise alarm sign A18.

2. Call up G45:Add cutter radius once.

.

•

„
o
OMilim
o.s Soo
III

3. Program movement.
Measure L (30)
The computer picks up the tool data from
the M06 instruction which was programmed
last.

•

3000

Cancel the cutter radius compensation
•N.../G40

n_r/Aftlf4Aft

5-G40/G48

G46 - Deducting the Cutter Radius

Cutter shall touch outer contour.
Cutter dia. lo mm

Programming:
N100/M00/W3C0 S2000/Y=0 / .F1
N101/G46
N102/GOI/X=L/Y=0/Z.=0/F.

L

The cutter moves by the distance 1-1).

Approaching an Edge - Not parallel to Axis

ti

Programming: incremental
Cutter dia. 16 mm
Reference dimension H Z ---- 0
11e1/M06/D800./S1700/Y=0/T(F)1
NO2/G46
NO3/GOI/X4000/Y2000/Z=0/F...
14°44/M30

40

Approaching an Edge - Not parallel to Axis
Pro gramming: absolute
- Cutter dia. 16 mm
Zero-point as in jrawing

40

NOO/G92/X-4000/Y-3500/21000/
NO1/M06/DE00/52000/2=0/T01
NO2/046
NO3/G00/X=0/Y=0/21000
NO4/M30

5-G401048

Exercises G45/G46
- Program the distance/ traverse P 1 -P
absolar_c! and Irlementai. mc•de.
- Radius

D:

12 mm

- Zero-point frca FoLnt P.

N

G

F
(Lic—n(t

(M)

+y

N

G
thA)

Y

X
(J)

(D)

)S}

(K)

Z

F
()..i sT,,:!—I;

.

N

G
( M)

(J)

N

G
!M)

(J1

Y

X

(5)

(D)

(K)

(Di

. v
K) (S)

X

—

Z

F
tl..} (T. (1.4)

Z

F
Li iTT)(i-!)

5-G40/G48

G47 - Add Cutter Radius Twice
- Outside contour shall be milled
- Mcde of programming: incremental
- Cutter radius 6 mm
- Starting point as in drawing

Programming:
NO00/M06/D600/S2000/2=0/TtF:i
N1/G46
N2/G01/X2000/Y1500/Z=0 F..,
N3/G47
N4/G01/X4000/Y=0/Z=0/F...
N5/G01/X=0/Y3000/Z=0/F...
N6/GO1/X -4000/Y=0/Z=0/F.,
N7/G01/X=0/Y -3000/Z=0/F...
N8/G46
40
15
20

N9/G00/X -2000/Y -1500/Z=0/
N10/M30

•
1..j

Block N4 to N7

Cutter radius is added twice.
Block NO2, N9

Cutter radius is deducted once.

Cutter path plotted

Urt1414AULF0

Programming exercise:
Cutter radius 5 mm

Starting from point P1

Determining the zero-point starting
from point Pi.
(L)(11iH)

c_rlAnirtmg

5-0401G48

G48 - Deduct Cutter Radius Twice
Example: Milling an inside contour
- Milling cutter radius 6 mm
- Mode of programming: incremental

Program:
N000/M06/D600/52000/Y=0/T(F)1
N1/045
N2/000/X2000/Y1500/Z=0
N3/001/X=0/Y=0/Z -500/F...
N4/G48
N5/001/X4000/Y=0/Z=0/F...
N6/001/X=0/Y3000/Z=0/F...
N7/GO1/X -4000/Y=0/2=0/F...
N8/001/X=0/Y -3000/Z=0/F...
Block N3: move in.

N9/001/X=0/Y=0/Z500/F...

Block N5 - N8: inside contour

N10/045

Block N9: move out of inside contour

N11/000/X -2000/Y -1500/Z=0/F.

Block Nil: withdrawal to starting
position

N12/M30

Cutter path plotted in one plane

5-G40/048

Exercise:
Cutter radius 5 mm

Incremental prcgrannin9
Starting from point Pi

Determining the zero-point
from point PI.

5-G40/G48

Example: Combined Inside-/Outside Contour

Milling cutter radius 5 mm

25

50

35

b-U4U/U411

Exercise:
Program the example in
absolute mode,

- Zero point as in drawing.
Cutter radius 5 mm

F
(L)(1) (H)

remarks

e Aftle■ AO

in

•G64

G64 - Switching Feed Motors Currentiess

The previously programmed G- and M-codes
remain stored.

Switching currentless with program
stored
G64 is a pure switching function. it
is not stored.

°o°°
N G XYZ F
D,J K

t+ i

718 9
4 5 6
1 2 3

1. Press key

64

M

2. When a number appears on the VDU,
press keyLpE1.1

1NP

HICl

DEL

M

REV
FWD

until G-lamp flashes.

I

3. Key in

64

4. Press key [INPL the feed motors are
now currentless.

5.1512

G72 - Pocket Milling Cycle
Pockets are a quite common shape when
milling. The programming work of many
single blocks can be put together to a
cycle. The computer offers a fixed sequence r cycle.

Programming G72
1. G72
2. X-value, inside dimension of the
pocket in X-direction.
3. Y-value, inside dimension of the
pocket in Y-direction.
4. Z-value = depth of pocket
. F-value

N.,

Format G72
N3/G72/ x

.mom= c
Ill
N

G

01.1”

X

W) (D)

0)

Y

($)

Z

F
(L) (T) (HI

mo..0..

+ 4/Z ± 5/F3

With this block the machine cannot mill
a pocket yet.
- It does not know the radius of the
cutter and thus cannot, calculate the
movements.
- Therefore, the tool has tc be described in one of the previous blocks
(MO6).
The computer uses these data (cutter
radius) to calculate the effective
movements which were programmed last.
-I f no M06 was programmed before, alarm
sign lb will appear.
L

MP 4

5-G72

Pocket Milling Sequence

The milling cutter has to be positionea
before the pocket milling can start,
NJ

I. The cutter moves into the pocket by
the Z-value, If a Z-movement is programmed

2. Milling out reaming) a pocket:
- The first movement is in X-directich.
-X +Y

- The signs determine the sequence
of the traverse.

Overlap:

•

The overlap is 1/10 of the cutter radius (with 3 mm radius approx.
0,5 mm).
The computer taxes the information about.
the radius from the MOE block which was
programmed last.

Ot

tae

Finishing ram:
The sides are. being finished.. Traverse
10/11/1.3. Finisning measu2:e approx.
1/1C of the. .:Litter radius.

Rapid traverse

Begin of cycle

4. Cutter moves out of pocket (Z-direction) into starting position.
The pocket milling cycle is complete.

End of cycle
t

Pockets can be prodrammea in absolute
or incremental mode.
Incremental programming:

X,Y,Z values are given from the stlarting
position.

Technological tip
When moving in a milling cutter the feed should be approx. halve of the normal
cutting feed.
Therefore it is advisable to program this first movement in an extra block.

RJ179 R

5472

Summary G72 (M06)
With Pocket in XY-plane
N.../M06/D(X)
:
Data for calculation
of cutter path

.../G72/x.

CD

D

X-value

/Z C_

/Y

/T(F)(::)

/F

Y-value

X = Inside measurement of pocket

1406
D(X)

/Z(II )

/S(Y)

= Inside measurement of pocket

= Cutter radius

SCY) = Speed
Z

= Hz-value

er'F)

Z = Indeed depth

= Tool number

F = Feed

The computer will calculate all reference points automatically.

Example:
.,- Cutter ciameter 10 mm
Ihe pocket is programmed. incrementaL'Ly
Start. position for cvc:a as in
drawing.
X
NI (D)

G
iNt)

N

r

'f

Z

IS)

2000

Mob

_Lil

(K)

too

o
-so.

N:7) = Move to. start position
NE = Tool data

= Pocket milling cycle

F
Mg) OA)

30

25

Example:

20

o
o

N

0

Cutter diameter 8 mm
Programming mode: incremental

Example:
Programming mode: absolute

o

Determine the zero point of the
workpiece

o

60

o

Mill the pockets in two runs with twi,
subroutines, if you know G27 already.

G81/81

Boring.
With. GOO and GO1 you can execute boring
operations:
1. You program with 001 (feed at desired
depth of bore
2. With rapid traverse you move to the
starting point of the boring operation.
The procedure is always the same one:
-

Boring with feed (G01) to length L
Withdrawal by length L with GOO.

Therefore these two movements are put together in one G-function (cycle),

G81 - Boring Cycle
Programming:
N.../G81/Z t /F...
- Under the Z-address you program the
depth of bore.
F-address: feed in mm/min
The withdrawal is done automatically
with GOO.

GOO,
G81

Application:

Through holes with a riot too large depth
of bore.

.20Z/

G82 - Boring Cycle with Dwell
If the depth of bore is reached, the withdrawal with G81 starts immediatel y (rapid•
traverse). The bore chip is torn off. The surface at the base of the hole is nct
clean.
Therefore the drill bit remains in the
programmed position Z.

G04

GO1

GOO

G82
Sequence
1. First movement: with feed
2. If depth of bore is reached, the drill
bit turns without feed 0,5 seconds.
Withdrawal in rapid traverse.
Programming:
N.../G82/Z±

/F

Application:
Blind holes cf medium depth.

g _itiVI 4

G83/B3

G83 - Withdrawal Cycle
it happens quite often with deep
bores that the chips are not flowing
out properly.
- Therefore you have to withdraw the
drill bi.t in order to take away the
chips.
You can program the operation with
G01/GOO/G01/G00 etc. or with various
G81 or G82 cycles.

The drawing illustrates the principle,
that a few cycles are again put together
to a new cycle.

1. Step

Chip discharge

2. Step

Chip discharge -

3. Step
Chip discharge
etc.

G 00

G 01

Gal

G83

083/B4

Programming G83:

The final depth of bore and the feed are
to be programmed.

Procedure:
1. Bore at 6 mm depth with feed
2. Withdrawal with rapid traverse (6 ram)
3. With rapid. traverse 5,5 mm and

6 mm feed

4. Go to starting point with rapid traverse
5. With rapid traverse 11 mm, with feed 6 mm
etc. until you reach the programmed 2.value.

Application: Deeper bores

G811821831B5

Example:

Pay attention to the technological data.
Use drilling emulsion to protect the drill
bit.
Bores larger than 10 mm dia, need to be
rough-drilled.
Use 081, 082, G83.

G85

G85 - Reaming Cycle
In order to achieve bores with a high surface
quality, reaming of bores is necessary.
Using standard twist drill you may reach
quality 11 to 12. For higher quality standards
the bores have to be reamed. By reaming you
reach quality 6.

G85 is a combination of two G01
'commands.

Programming:
- Block number
- G85
- Z-value
- Feed F

Feed Gal

Feed GO1
G8S

Note:
• The depth of the bores to be reamed is
indicated. in the technical drawing.
The bore-length 25 has a tolerance
measurement,

G89

G 89 - Reaming Cycle with Dwell
The sequence is the same as with G85. The
reamer bit remains 0,5 seconds in
the dead position if the programmed depth
. is reached.

Sequence

GO1

G04

001

G85

Infeed with feed at
length Z

0,5 seconds dwell

Withdrawal with feed
at length Z

Chapter 6
Tools, tool lengths compensation,
radius compensation of milling cutter

Programming of tools
Tool lengths compensation (principle)
Working with various tools
1. Determining the tool sequence
2. Determination of tool data
2.1. Diameter, technological data
2.2. Detecting the tool length differences
3. Calculation of tool lengths
4. Tool lengths compensation in the
program sequence
5. Tool lengths corrections
Other cases for programming M06
Connection: Zero-point offset G92
Tool lengths compensation M06
Milling of chamfers
Depth of bore with spiral drill
Tool data sheets
Tool sheets

6.1
6.3
6.5
6.7
6.7.
6.9
6.13
6.15
6.17-6.21
6.23
6.25
6.27-6.33
6.35

The Programming
of the Tools

Tool magazines of industrial NC-machines
are equipped with up to 50 or more tools.

The sequence is programmed.
Technological data and dimensions have to
be programmed for each individual tool bit.
Tools are programmed using the T-addxess.
T stands for tool.

Tool Lengths Compensation

TO1
i`'

T03

T02

y
ma
IC

)411111111 .

I

gar

Alaix
AVIV

_______
..Ta=

•

•■■•.

..„,.--,L,.....

'''r • •...
---.a.:. -;—
.
um Gila

I

......

7-TITTIT.

E
...,

074

111111

: _a
or EA

It

...,4=a0

PC

z;

1 Target

1

4

I Actual

,

rl
4.

i

I Actual 1

Z,

Act. Position = Targ. Pos.

Targ. Info = + HZ

Targ. Info = —HZ

TO1

IM06ID

. /S. . . . /Hz = on-o1 I

The computer is given information on the
target position or desired position.

102

IM06/D

/S. . . /Hz = +

. 11021

T03

[M06/D .... .... /Hz = — .

/T03 I

Imagine the coordinate system transferred into the reference plane of the
tool.
The target position is described starting from the actual position.

M0611

Working with various Tools
Determining the toot sequence
Detecting the tool data
Compensation of tool lengths
T1

'or the manufacture of a workpiece you
often need different tools: drills, various milling cutters etc.
The programmer needs to know various
data such as
- Kinds of tools
- application of different tools,
-. position of tools to each other

T3

1. The milling cutters are of different
diameters. These are known'to you.
2. The tools are of different lengths.
These are not known to you. You
have to measure the lengths and
take them into consideration when
programming. Otherwise you move the
cutter in the air without chip removal or you run it into a workpiece
(crash).

M06/2 U

Procedure
1. Determining the tool sequence

Milling a slot with T2

Facing with T1

Milling a T--slot with T3

2. Determination of tool data
2.1. Diameter, technological data

Entering the data
1. Stick the tools into the correSponding column.

r

'D=

.

:d

7

2. Enter the technological data:
d =, Cutter diameter
D = Cutter radius
F = Speed of feed
t = Maximum depth of cut
S = Speed

2

easier.

M06/3

2.2. Detecting the Tool Length Differences (Hz)

The differences in tool lengths nave tc
be measured. The measurements can be
taken using an external presetting device. In. many cases the measuring system
within the CNC-machine is taken use of.
You can scratch with all tools a reference surface or measure the data using
a dial gauge.
The difference is called Hz.

Procedure
Mount Tl reference tool) and scratch
reference surface, set dial gauge respectively.
Detection of data by
scratching

Detection of data with dial
gauge.

Scratching only when cutter is turning

Set dial gauge when machine is
at stand-still.

Set dial gauge to 0.

T1

T3

T2

T4

Press keyFaI4, the Z-value display is
set to 0.
‘=17.1

N G XYZ F

00C13000

:

d.

D,J

F

0

t

s

t
HZ 0•.1R

L,T M

T

M06/4 U

Mount 12

Scratch surface

Touch dial gauge with cutter
until it shows 0.

Read value from display.

N G XYZ F

0003000
D,JK LT M

650
d

!

Enter value into tool data sheet. In this
way you determine all tool lengths.

F
t

s
HZ 0

Pay attention to the signs!
6 sc

•

+

3. Calculation of Tool Lengths
(Tool lengths compensation)
Since these data are known you could
take the various lengths into consideration. This would, however, be
quite confusing calculation work and
will often lead to mistakes.

Calculation of tool length M06
(Tool lengths compensation)
(Programming)

Format M6
N3/M06/D(X)5/S4/Z(Hz)±5/T(F)3

The data are entered into the
pro g ramming sheet.

N

G
(M)

X
(J)

Y
(D)

(K)

(9)

Z

F
IL) (T) (H)

T = tool number
D = milling cutter radius
S = spindle speed only for your information)
Hz = difference in tool length

faIMMKIINIIIIIIM
111111ENIMIIIIIIIMIMM

•inmmommirm
EMI= 131111
121111MMIE
g ' MEM MIIIIII
111111111111M1111•11
2 coo

65 0

■,. ME-ME ii•11111111111

Note:
If you writ a number 1,2,3,4 under the

F(T) address when programming M06, this
automatically means program hold.
If there is a 0 under the F(T) address,
there will be no hold.

Tool Lengths Compensation in the
Program Sequence

The first tool (T01) has a H z value
= O.
N.../M06/D2000/S1300/7,Hz)

0/T01

Manufactu;€1

Tool change T02.
N.../M06/D500/S2000/Z(Hz) = 800/T02
[ tart
First the tool T02 moves from the actual position to the target position.
Then the manufacture itself starts.

Tool Lengths Corrections

You have finished the manufacture of a
workpiece and find out that the Zmeasurement is not correct.
- The grogram is correct
- The starting position of the cutter
is correct.

What is the reason?
The target value information {H z value)
was not correct (wrong, inaccurate
measurements, cutter not resharpened).
Actual value
Target value

TARGET INFORMATION Hz wrong
M06/D.../2.../2+ 12.43/T02

Reference line

Z=1,43

zK

=11

The target information Hz has to be
corrected.
Hzk = Corrected target information

Hzk = Hz +

correction value

M06/1),../S.../Z+ 1100/T02

4{.11

Z)

Example of a Correction of the Hz•value

You may
1. Measure tool once again
2. Detect the correction value by
measuring the workpiece.
AZ = -1,35

The Hz information has to be correcvalue.
ted by the

- Imagine the coordinate system transferred to the Z-actual position of
the workpiece.
- Add the correction value 6, Z to
the target information Hz of the
tool bit.
AZ = 1,35

Pay
Hz

2: 15,4 -1,35 =14,05

attention: L Z may have t sign.

Hzk =
=
=
=

Hz + (-G Z)
15.4 + (- AZ)
15.4 - 1.35
14,05

The value Hzk = 14,05 is corrected in
the programming sheet, tool. data
sheet and in the memory.

Example
Programmed Hz-value (actual informaticn):
- 6,25 mm
Workpiece measurements: Actual and target, compare drawing.
Correct the Hz-value
Hzk = Hz

1- ( t

2)

Pay attention to the sign of

Z.

Z.

Hzk =

Example
Hz of TO1 = 0
Hz of T02 = -4,32
Workpiece:

Actual value TO1 = 10,5 mm
Actual value T02 = 5,2 mm
Target value TO1 = 10 mm
Target value T02 = 6 mm
Correct the Hz-values of TO1 and T02.

TO1
Hzk

j

TO2

Other Cases for Programming M06

i
T.n i
io
NI

G

X

OAF- ill
(M)

(J)

(D)

(K)

Y

(8)

Z

0
H.
iii
(T )
F

(I-)

(H)

If a G45, G46, G47, G48 or a G72 com
mand (cutter radius compensation) is
programmed, in one of the previous
blocks a M06 has to be put in, otherwise the alarm sign will, appear.
Ali: Cutter radius information missing
The computer needs the cutter radius
information D in order to calculate
the compensated paths .(G45,G46,G47,G4'•
The same applies with the pocket
ing cycle G72.

Alarm A16
Cutter radius
information missing.

Connection:
G92 Zero-point offset
M06 Tool lengths compensation

M06

G92

The Hz-information is an incremental
target information within an independent coordinate system.

The origin of the coordinate system
is determined with G92.

Milling of Chamfers
Chamfers are usually milled at an angle
of 45°.

The size of the chamfer is determined
by the programmed. path and/or by the
cutting contour.
1. Chamfer size determined by different
cutter paths (different distances
between cutter axis and workpiece
edge)

2. Chamfer size determined by different
infeed and Z-direction. The cutter
path remains unchanged.

Programming a Chamfer
with Cutter Path unchanged

The contour is milled with a cutter of
(;) mm dia.
To avoid the necessity to program a
new cutter path for chamferring, the
angle cutter shall be programmed in
direction such that a chamfer lx1 mm
is reached.

Cutter path. - end mill
- Cutter path - angle cutter

How deep has the Angie Cutter
to be fed in?
The radius of the angle cutter which
mills the inside contour of the chamfer:

[- adius end mill/
R

r

Width of chamfer!

With a mill. path using a 5 mm shank,
dia. '3 mm, the radiJs 3f the angl e
ter produces the chamfer ix45°.

Angle
cutter

Mill
path

Width of
chamfer

Angle cutter, dia. 16 x 4 mm

With a 45 0 angle cutter, the cutting radius changes by one mm if the cutter is
fed in by 1 mm.

Example
Radius of mill path 5 mm

1. Cutter at height 0
Distance to workpiece = 1 mm

2.. Cutter fed in by 1 mm
Radius 5 mm touches edge.

3. Cutter fed in by z mm
Chamfer. 1x45° is produced.
Measure of total depth!
Measure until radius mi l path

Width of chamfer (1 mm)

2

mm

mm)

Example
Unchanged mill path
- Radius end mill: 5,63 mm
- Chamfer 0,67 x 0,67 mm

With an infeed of 1,63 mm the angle

cutter touches the contour.

1+ 0,63=
1,63

Infeed 1 mm
Infeed 1,63 mm

R5
R5,63

Radius- 6,3 mm produces the chamfer contour.
5,63 mm radius cutter path
0,67 mm width of chamfer
6,30 mm

,3

Cutter infeed

1,63+0,67=
2,3
5,63
0,67 mm

1,63 mm (radius touches contour)
0,67 mm

(width of chamfer)

2,30 mm total infeed

G81/0

The Depth of Bore with Spiral Drill

Kind holes are dimensioned down to the
fiat ground of the bcre.
If you want 'co calculate the tool length
you either scratch the surface with the
point of the drill tit or you take
measurement of the length of •the tool.
In order to program the indicated depth
of bore you nave to add the length of
the tool point.
H

tg3O °

2

H = tg30

0

x

d
7

Chart
Drill
dia. in mm
2
4

6

8
10
12
14
16

•

11 (mm)
0.57
1.15
1.73
2.30
2.89
3.46
4.04
4.6/

Drill Data for the Tool Sheet
Always deduct value H from the
measured data when you enter it.
You need not to calculate anymore and
can program the dimensions of the
drawing directly.

Tool Data Sheet
T1

T2

T3

T5

T4

T6

T7

T8

d
D=
F

2

t
S
HZ
HZK
d
D
F
1
S
Hz
Hzic

Cutter dia.
(mm)
(mm) . . ... ....... Cutter radius
(mm/min)
Feed speed
Max. milting depth
(mm)
Spindle speed
(U/min)
Difference measure
(mm)
Corrected difference measure
(mm)

Zero-point of workpiece
Start position
Tool change position

Vertical axis system

Horizontal axis system
+t)

Z

+X

4,

4011.1111111111,

Zero-point offset (G92)
X

mm

Y

mm

Z

mm

Drawing no :
Denomination:
Workpiece material:
Program no.
Name:
Date:

LT

it..
7.

ei,11::•_.._._..

!

7

v

• 1.':.i.). • N 771)
•

vi

_

•

r

_ _--. 1 1 1
..

,

ti 1_ - - !i . - 1
_i_
------ ---. 'i,-(t ./

Mi

The M-Functions
Miscellaneous or switching functions.

MOO - Program Hold

If you program MOO in a block, then
the program will be interrupted.
Continuation of the program: press
Ffa1 key.
When Do We Program MOO?
-

Tool change
Take measurements
Switch to hand operation
Carry out corrections
etc.

M30 - Program End

N

X (iD)

(K,S)

F LT)

000

In the last block of a program you
have to program M30. Otherwise the
alarm sign A05 will appear.
After M30 the program jumps automatically tc NOO. You can start anew.

'120 tel3o

If the ONC interface is mounted, M30
switches off the mair. spindle (M03
is cancelled).

M2

M03 - Milling Spindle on
(only with accessory DNC-Interface)

M 03

The M03 instruction switches on the
milling spindle. Switch the milling
spindle on such that the motor has
enough time to run up and that you
are in position to set the right rpm.
Important note M03
Before pushing the start key the
main spindle switch has to be set
to CNC-position.

M05 - Milling Spindle Off
(only with accessory DNC-Interface)

Format M05

t

When do we

N3/M05

iTogram 1405?

- Before a tool. change

- Before taking measurements
Note:
M30 switches off the milling spindle
too
M06 switches off the milling spindle
O.
if T(F)

M3

M06 - Tool Lengths Compensation

Compare cnapter Tool LengthsCompensation

M17 - Jump Back into Main Program

Compare Subroutines

M99 - Circle Parameter

Compare Circle Programming

M08, M09, M20, M21, M23, M26 are
as switching functions not yet defined.
with. them you could activate peripherical devices (under preparation!)

Chapter 8
Input of Program, Corrections, Operation
Survey
What happens when data is put in?
Input format
Indication on the screen
Input of program
Operating elements CNC; Program input
Option key hand operation — CNC operation
The word indication
The figure keys, the minus key
The memory keylINPI
The l -31 key
Thei FWDIkey

ThefREVIkey
The( DELI key
Input of M-values
Take-over of registered values
Inserting and deleting of blocks
Deleting of a registered program
Program Sequence
Testrun
Single block operation
Automatic operation
Interventions during program flow
— Program stop
-- Program hold

8.1
8.2-8.3
8.4
8.5
8.6-8.7
8.9
8.9
8.10
8.12
8.13
8.14
8.15
8.16
8.17
8.18
8.19
8.20
8.21
8.23
8.25
8.26-8.27
8.29
8.31-8.33

Input of Program
Corrections
Operation
The knobs, displays, symbols, etc. will
confuse you in the beginning.
So first put in the very simple programs
and check the various function -keys. In
half an hour you will be accustomed to
them.

S u ry e y

Data Input, Correction, Delete
Storing a word

Sequence of Program
Testrun:
Inching through the program

FITTj

Take over of values


Correcting a word
Put in
P24]-4.
v alue

7

+

••--•

M-programming

(first number key)

Press g

Automatic operation

Searching

a word

Searching a block
FWD

iSTAR1

Influencing the Program

riR8C71

Inserting a block
;Aal + riNiq

Deleting a block
+

;DEL]

Termination
[INP1 +IRE

A

In terruption
+ IFWDi

Deleting a program
(DELI + (MP'
(first DEL)
set

Storing of Program I

program to NOO

IINPi + 'TZTV

RS-232 C operation

with

N

What happens when Data is put in?
We put in GO!.

Secretary iinterface element) reports
to director:
Somebody wants G01!

,

•

4. The director instructs the memory
operating program (RAM = Random
access memory):
Rememher G011

• _ Nod.1

Director CPU = Central Processing
Unit = Microprocessor) asks his specialists:

5. The memory reports to the director:

0.k,,, I have noted it down!

Can we execute GOI?

•

3. The specialists (EPROM = Programmable
read-only memory) think and inform
the director:
Yes we can1

R

6. Director instructs his press-speaker

(output element):
Show them out there, that we are
clear with GOl. We have everything
understood and are ready for further
inputs!

Data input

What happens when Data is put in?

Digital read-out

Data Input

Interface element
(secretary)

Central processing
(Director)

Operating program =

Memory = RAM

Output element
(press speaker)

The Block Format or Input Format
According to the key number (G-, M--functions) you have to put in the required
information.
The computer will ask these informations.

X

G

we—

1111

(M)

(0)

(.1)

migrimmo_p
F

rift INP
IMEM51.11111

Example:
If you press INP after the G90 input,
the indication jumps to the next block.
number.

04

N

00

04

G
(M)

X

(4

Y

(0)

(K)

(S)

Z

F
(L) (T) (H)

BEEMIllin
MI

IM

Example:
You have entered the X,Y-values with
GOO. After the registration of the Yvalue the indication jumps to the
next block number.
Why?

The computer knows
polate only in two
of X- and Y-values
automatically to 0
programming).

G

(M)

X
(J) (0)

N

G
(M)

00

DO

{J)
C

Z

Lloo

0

00

.Y
(k) (S)

X

(0)

Y
(X) (S)

D

c===p

Z

F
(L) (1) (H)

111.1
IIIIII
F
(L) (T) (H)

C=J--------

that it can interplanes. After input
it sets the Z-value
(with incremental

Example:
If you, however, have programmed the
X-value with zero, the computer will
ask for a Z-value.

Example:
With absolute programming mode the computer asks all three values X,Y,Z.
You have to tell the computer the plane
from which it has to start the movements.

fl A

Indication on the Screen

Mode of operation absolute - incremental:
CNC OPERATION
INIGI

XI

INCR.
VI

z IF!

1. When switching on the CNC-operation
the control is in incremental operating mode.
2.

If you program G90 or G92 the screen
shows the absolute operating mode.

3.

If you program G25 or G27 the display
disappears. The computer recognizes
this only in the program run.

CNC OPERATION ABS.
INIGI

x I

Y i

Z IF

Mode of operation metric - inch:
According to the position of the option
switch the metric or inch mode of opera-

tion will be indicated.

Metric 0,01 mm
Inch 0,001

CNC OPERATION ABS.0.01MM1

NIG'

x! Yi Z!Fl

Vertical or horizontal axis system
_L Vertical
Horizontal
These symbols indicate which axis system
is in operation.

Input of program

30o

Example
X

N

Start

30oo

0

QO

-04

DO

02

Program end

(Kt

J) (DS

V

5

2

(UT (I-s)

0

0

Mao

0

0

--1

—Zoo()

;41 1. Switch on main switch

T1F Control lamp for current
supply and lamp for mode of
l•
71: operation hand-operation
are on,

EE

N G XYZ F

H/C

o Kg)

L

23
ACC
mm /mm.

N G XYZ F

O 0CLIDOO

r

2. Press key

0001:000

D,J K LT M

00

D.J K

jo

LJ M

h/C

The control unit is switched

over to CNC-mode of operataon.
On the digital read-out the

lamp of address N is on. 00
(NOO) is shown.

CNC OPERATION
N G
IL GO
01 I

X

The screen shows N

Y

09.1

1

3. Press key!INP
N G XYZ F

O 0CLIDOO
D,J K L;T

1NP

M

/Mb

0

N G XYZ •F

O 000
D,J K LX M

00

N G X YZ F

1NP

O 0=000
0,J K LT M

CNC OPERATION
N!GjX1Y
• 00L____!
: 01!

CNC OPERATION

4. Put in G-information
0

N
001-071,
011

0

00 shows on the digital read-

out.

CNC OPERATION
NG
00 Oa
01

With INPIyou instruct the computer to register NOO. The
address letter jumps to G.

XIV'
I

5. Press keyIINPl Address inilcation jumps to X.

N G XYZ

F

CNc OPERATION

00CCD00
D,J K
t:r M
i
i

3 0 10 01

30001

N

G XYZ

1

F

r---..

F

Z

:N G
00i 00

: Oil

0

N

GXYZ F

0 0 CCD 0 0
D.J K

LX M

•

!

X
i

0

N • G , XI
001 001 30001
I LTI
1
!

N G XYZ F
DJ K

NIG
X :
00! 00 30001
., at:

—
8. Put in y -value 1.0.
•

..
9. Press IINP! Display jumps

CNC OPERATION

00CCDOO
13' M

L_.

O

N G XYZ

1NP

....0:.
,

CNC OPERATION

I

111P
4
/

INP!. Display jumps

:

Y

3000i
:

Press
to Y.

:

CNC OPERATION

0 0 : CCD 0 0
DJ K
S M

0

01[

.

7.

Y;

: 001 00; 3000i

I

G XY

6. Put in X-value 130001.

:Y

X !

•N;G:

,

N

X

CNC OPERATION

0 0 D.J K 0 0
CEOLT M

1NP

00:. 0099_91,
C!

N.OL

:,

F

00CCDOO
D,J K

L

•

LT M

0

!

i

Y;z
OF 1
•
.

Z.
tO

V L Z
0 1, _..._0I

CN C OPERATION
N,G: x
00i oo. 3000,

Y
0

Put in Z-value

D.

11. Press 0101. Block NO0 is
entered. Block indication
jumps to N01.
12. Enter block NOl ' in the
same way. Put in the Minus sign after the number value.

•

13, M30 (rogram end)

M

3

N G XYZ

F

Co 0 CliD 0 0
D.J K

LX
30'

CNC: OPERATION
Y!
0!

00101

0

01

03E1

START

TART

I

Put in NO2
- Display is at G.
- Press key 0 then the Maddress is indicated.
- Put in the figure value.
- Press IINPI.
-

.NIGI X 1
! 00 001 30001

1

14. Press keyISTARTI, Display
jumps to NO0 (only if M30
is programmed).
15. Press key START
gram runs.

the pro-

Operating Elements - CNC

Program Input

Option Key Hand-Operation/CNC-Operation
H/C

0003000
ch..} K
N G XYZ F

0

DEL
REV

F
By pressing key

FWD

H/C

the mode of operation

changes from hand-operation to CNC-,
operation.
The relative mode of operation is indicated by the lamps 2
0

(CNC-operation) or

(hand-operation).

To put in a program it has to be switched
to CNC-operation.
In the CNC-mode of operation you cannot
move the slides by hand anymore.

The Word Indication
The lamps and light bars of the word
indication show you which data you can
put in.

Digital read-out

Monitor

The actual words are indicated by
lamps

The actual words are indicated by a
light bar.

N G XYZ F
0 0 CCD 0 0

CNC - OPERATION
N G; X
1 00
01

Y

Address indication G, M function
If depends on G or M-functions which addresses and/or data are required?
E.g. M06

M06 requires a D,S,Z,T information.

Digital read-out

Monitor

The X-indication is also valid for the
D-value, the Y-indication for the S-value and the F-indication for the Tvalue if M06 was programmed.

The address letter D,S,T are indicated.

OPERATION
N G
1 00
•
01
02

031,4060

X

Y

F

The Indication of Addresses
D, J, K, L, M on the Screen

CNC OPERATION
NLG

X!

G25/G27

`/H ZIFI

The address letter L is indicated.
(L = jump address, subroutine
address)

Format MO6

CNC OPERATION
INIGI

X

.

Y

Addresses
- D (milling cutter radius)
- S (spindle speed)
- T (tool number)
axe indicated.

Format M99
Addresses
- J (start of arc of circle)
- K (end of arc of circle)
are indicated.

NG
0 0

Attention:
X,Y,F lamps ' are valid for various
addresses.

The Figure Keys

You use the figure keys in order to enter the various values for address letters
X,Y,Z,F,G,M,D,T,L,J,K.
The entered values appear on the digital
read-out and/or on the screen of the monitor.

Fr] H.
-

The Minus-Sign Key ID
N G XYZ F

O 0=000
D,J K

L.J

1

°

9 I NP

H/C

6 DEL

M

2 3 REV 65
FWD

0

1,4j
R1

X,Y,Z values can have a minus or a plus
sign.

Pius sign input for X, Y, Z:
Put in figures only.

N G XYZ F

O 0CCIDOO
K

LX M

1400 0
H/C

Minus sign input
After input of figures, press EL] key.
The minus sign appears as a bar on the
digital read-out.

M

Example:

tit

X = -1400

Input: Ly4 PEI

The fistiiiKey = Memory Key

]INP! = Abbreviation for . Input

LIN

= Instruction to the computer to
register the entered value.
N G XYZ F

0003)00
D.J K L,T M

1

89
4 5 6
1 2 3
— 0 -4-

Digital read-out
N G XYZ F

r

DEL
REV
FWD

FTAPT

Example

23501

- Entex value12350 The number
appears for your information
only, it is not in the computer yet.

00CICI►OO
K

M

718 9I TWP-1

Monitor

CNC OPERATION

K L,T M

N G XYZ F

d

IINP

Lamp X lights up.

0001:11D00

L

I

o

H/C

- You press INP. By pressing
this key, figures are registered; at the same time
the number 2350 disappears
and the light jumps to the
next address letter.

M

Note
With1INPi you can also jump forward in the
block.

, N G _x_ Y
235000I
01!

The

Key

Instruction: to jump forward within one block

0003000
M
N G XYZ F

'4W7

III;

0
5
5

IN
700

ro
aar..
rnrn In. n.

F

D,J K L3

0
H/C

111

'CIART

the program will
By pressing the key /-10
jump to the next word. The entered value
of the next word will appear on the digital read-out(Permanent function when you keep on pressing the key)

0 .1

A

The FWD Key
Instruction: to jump forward block-by-block

N G XYZ F

000137300

Mw

0

D.J K LT M

:s3r,

-5

).743

I r,-1]

0

111111E111

NEI

X
(J) (D)

(K)

y

(S)

(L) (T) (H)

1. A given word is displayed. By pressing the IFWD1 key the program jumps to
the next block numher.

2. If a block number is indicated: when
pressing the FIE key the program
jumps to the next block number.
F
(L)

(H)

3. If you keep the iniD key pressed down,
the program will jump block-by-block
to the program end.

The 1:1E■ii Key
Instruction: to jump back in program blocky-by-block

7+
— i/1/-

r-T-7n

7 8 9j 11NP
4 5 6 DEL
1 2 3 REV
FWD
0
.1-

tzl

Function:
1. A given word is on the display.
If you press key iREVI the program jumps
to block number N.

X
(J)

;01

(K)

(L.) Mill)

(S)

2. If block number N is indicated and you
press keyiREVI, then the program will
jump to the previous block number.

N

(M)

(J)

(D)

(K)

(S)

z

(l)(T) (HI

3. If you keep the W.Ol key pressed the
block number jumps back to NCO (permanent function).

The DEL Key
= Delete key, correction key

DEL is the abbreviation of delete,
which means to cancel, to extinguish.

N G XYZ F

O 0 CCD 0 0
D,J K LT M

O

••■••••■••

Ito

H/C

You can delete only the value of the
address letter which is indicated. If
you correct a X-value e.g., the address
letter X has to be on the digital readout.

DEL

Attention:

REV
FWD

START

With IDELIonly the digital read-out is
cancelled, not the value in the register.
You must put in a new value and store
it with [INPJ.

N G x Y2 F
O 0 CED 0 0
D,J K LT m

520

0
HIC

[+1
r

Example: You want to change value X from
520 to 250.

1. Press DELI key, the value 52C will disappear.

N G XYZ F

O 000
D,J K tT m

L

250

2. Put in the correct value (250).
H/C

r

3.

key, value X is registered;
light jumps to the next address letter.

PresslINPI

Input of M-Values

0
If you want to put in M-values: at
first you have to select the M-key.
The M--value is programmed in the
G-column.

L_J

r

N

G XYZ F

00CCD00
D,J K LT

m

3

0

Input: M30
Address G has to be shown

INP

4 5

N

Monitor

Example

Digital read-out

6 DFL

H/C

M

G XYZ F

N G: X
00

Press P,T

Put in

0 0 OM 0 0

CNC OPERATIONS

ill

30 0

CNC OPERATION

D,J K LT M ••

N;G: X

Press IINT] (register)
,

oo(

H/C
14 M3^i

Attention:
▪ M-values are not taken over by
pressing INP
-i- If you press INP after M30, the
program jumps back to NOO.

A 1S

Y

Take-Over of registered Values into the
following Blocks
By pressing [INPIthe register takes over
the previously entered value of the relative word column.

N

G
{M)

rr

00

X
(J) (D)

2000

Y
(K) (S)
300o

0

0

04

02
03

F
(L)(T)(H)

Z

-4000

Example 1
- G--address is shown
INPS
- G-value flashes shortly and Is registered
- Word indication jumps forward

INP

r

N

G
(M)

X
(J) )D)

(K) (S)

00

00

2. oo

30oo

01

00

0

0.Z

04

200o

F
(L)(T)(H)

•

0

0

0
000

Z
.
-

-70-Ei

4

goo

0

04
INP

- -

Example 2
- You want to put in the value Z=0 in
block NO3,
- You happen to see that the Z-value
in block NO1 should he -1000 and
correct the value.
- After correction you carry on with
the Z-value input of block NO3.
- If you press!INP[the register takes
over the previously entered Z-value,
i.e. -1000.

Attention:
M-values and inputs are not taken over
with IINP1

Inserting and Deleting of Blocks

N G XYZ F

yil4- -nserting a block
;,_7J
Deleting a block

0001:000

K

CC

1.7

rk..

1

mmm.m.
7 8

12

45 i

H

1

.—

.

--170
,INPi !0-

63

!

Remark 1:
First press key viand
(keep1,--, !pressed).

Remark 2:
Perranent function when you carry on
pressing (more than 0,6 sec.), i.e.
you insert permanently empty Ilnes •.A74Ch

I

,REV .1;

0

}L °f

then key INPI

ids R

G21.

N G XYZ F

Example: Inserting

0 0 CUD 0 0
D,J K L;T M

+ Digital read-out shows block a02

02

M
IIIIII
•
all
TM
(J) X (D)

0

00

00

4

MEI
04 ga
0

00

03

r

00
01
2

01

o

2.

0

F
(L) CT) (H)

Z
0

0

o

o

400
400

0

0

►►
r

=
2.5o

0t
0

•
.0

loo

0

0

400

C1

►o

OS

3o

00

00

04

04

0
0

Press

FITTIT1

+ In block NO2, G21 is automatically
written.
+ The original block NO2 is automatically changed over to NO3 - also all
subseauent blocks to the next block
number.
+ In block NO2 you can program required
instructions as you want.

Procedure

0

01

[INP1

1 0

26-0

03

04

0

1500

0
►

IN

+ Delete G21
+ Put in wanted bleCK

Do

0
0

0
- do

400

Example: Deleting

IDEL]

+ Digital read-out shows NO2
Press!,-.../14DELI
NO2 is deleted
All subsequent blocks are backnumaered: NO3 - NO2, N04 - NO3, etc'.

Deleting of a registered Program

Possibility 1
N G XYZ F

00C1CDOO
D,J K
L,T

Switch off main switch.

o

Possibility 2
Press emergency stop button.

r

1START

Procedure

N G XYZ F

00CCIDOO
D.J I

Possibility 3
A certain block number is indicated
(NOO, N01, NO2 ...).

M

00

First press key
mains pressed).

IDEL1

then

IINI
D

1 (DEL re-

The registered program is deleted.
The digital read-out shows NOO.

The Program Sequence

1. Testrun
The program runs in the computer. There
are no instructions given for slide
movements.

2. Single-block operation
The program is worked off block by
block. The slides move as programmed.

3. Automatic operation
The total program is worked off.
Switching instructions are carried
out.

1) Testrun
The program runs in the mind. The instructions for slide movements are not
given.

Purpose of the testrun:
- Block mistakes are shown.
- With absolute programming mistakes of
the linear or circular interpolation
are indicated (e.g. if you programmed
movement in 3 planes simultaneously
or you determined the target point of
the quadrant uncorrectly, etc.).
If you have programmed subroutines or
jump instructions you can check the order of the instructions.

Activation of testrun:
1. CNC-operation
2. Indication has to be on N-address
00 00
0
00 2400
01
02 MOE, D Coo
03 t
2 o

3. Press 1I-key:
the indicated block is worked off.
Soo

4. Press Ej-key:
The following block is worked off.
etc.

2) Single block operation
In the testrun you do not see whether
you run with e.g. GOO into the workpiece
or whether i directions are correct.
This you see in the single block- or in
the automatic operation.

Example:
1. Block N000
- Block indication is at N000.

1

Press key 1, then key START (key 1
has to remain pressed).

Block N000 is worked off.

1
The screen shows dwell in block
N001.
2. Block N001

Press again

rs1ART1.

Block N001 is worked off.

The screen shows dwell in block NO02.
In this way the program can run in
single block operation.

(continued)

Various blocks In single block
operation:
If you e.g. press keys DI+ rSTAR'Il there
will be 3 blocks worked off. You can
work off up to 9 blocks in one go(0
1..START1)

Dwell in single block operation
+1FWDI.
Press
The slides stop.

If you pressLSTART the program continues.

Interruption of program
Press 4111)1 I REvi
The program jumps back to N000.

3) Automatic operation

G
(M)

X
(J) (D)

Y

(K) (S)

2

- Set block indication to N000.
Possibilit 1

01

(Is

.

•
.

zit

la11. El
MIMI

NM
mo 11111111.

OEM 30

Press

1

12E 111

key, until NO00 is indicated.

Possibility 2

Display shows any given block number.
Press 'INF' IAREM, indication jumps to
NOO.
- Press key [STARTI. The program runs until a hold or until M30.

To continue program after hold
Press key !START

Program Hold
- Programmed hold MOO.
- In connection with M06, if under the
address T (F) a number 1. to 499 is programmed (with inch operating mode 1 to
199). If under T=O is programmed, there
is no hold.

Interventions during Program Flow
1. Program stop
2. Programm interruption

1. Program stop
INP -

P.0. The program jumps
Press keys [El— 1-1-PI
back to NOO (start).

Pay attention:
If you press 171key after 5114
the program starts with NOO. Your tool
is not in starting position! Collision!

New start: Measures
Position the tool in program start position.

Sonst Kollisionsgefahr and falscher
Programmablauf

2. Program Interruption
INP1

iFC61D

The program is stopped.

00CED00
p
N G X YZ F

To continue program:

.JK LT m

Press key LS TART1.
0

■••■••■•

Why program interruption?

INP
DEL
tit

FWD

You may e.g.
- change the feed
- take measurements
- switch over to hand operation and carry out a correction by hand
correct program, etc.

Effectiveness of Corrections with Program
Interruption

LINP

/r

[F WDi

1. Corrections of feed:
Feed corrections become effective in
the interrupted block.'
2. Corrections of G,M,X,Y,Z-values in
the interrupted block are only effective in the following program run.
3. Corrections of G,M,X,Y,Z-values in
subsequent blocks will be effective
when the program is continued.

9. ALARM SIGNS
9.1
• Purpose of alarm signs
9.2
• Procedure in the computer when
input is wrong
9.4
• Alarm survey, possible inputs
• Measure when alarm sign appears
9.5
9.7 9.15
• Alarm signs, details

A5: M30 instruction missing
WithiSTARTithe computer checks if M30
(program end) was programmed.

A6: M03 instruction missing
(M03 main spindle ON)
This alarm only appears if threading
cycles are programmed.
Attention:
The main spindle switch has to be in
CNC-position!

A08
A09
A10
All
Al2
A14


A13: inch/mm or vertical/horizontal
switch with full program memory
This alarm cannot be cancelled by [INPJ
IEV/ , You have to switch back into the
original position. If you nave put in
a vertical mill program with switch position at horizontal mill, you have to
enter the program new (with correct
switch position.

A15: Wrong V-value
For admissible data see chart.

A-16—A17

A16: Cutter radius data missing
If a G72,G45,G46,047,G48 instruction is
called, there has to be programmed a
MO6 information with cutter radius data
(D) in one of the previous blocks. Without this information the computer cannot calculate the center point path,

A17: Wrong subroutine
If a subroutine is nested more than 5
times, an alarm is shown.

A18: Movement of cutter radius compensation smaller 0
Example: substract cutter radius once
:446

G46
GOO/X3000/Y=0/Z=0
Cutter moves 30 minus 5 = 25 mm

M06/D500/5..../
G46
GOO/X500/Y=-0/Z=0
No movement
Cutter radius = traverse movement

M06/0500/S....
G46
GOO/X300/Y=0/Z=0
Aiarm
Movement X= 300 is smaller than cutter
radius. 300 minus 500 = -200.

A17

Special case — Alarm Al 8 with pocketing
The first measure for the pocket has to
be larger or equal.
Cutter dia + 0,1 cutter dia.

Example:
Cutter dia. 10 mm
Minimum measure for pocket
d+0,1
0,1

10 + 0,1 x 10

10,1 mm

Reason:
Finishing cut 2 x 0,1 R (radius) is
fixed. in cycle G72.

01xR

Alarm/Measures

Alarm Signs
Purpose of alarm signs:
If you put in and store data which the computer does not know, if you forget something or program a wrong block, then the
computer gives an alarm sign.:
The alarm sign appears on the digital
read-out in form of a certain alarm number,
on the monitor you get a commentary too.

N G XYZ F
0 0 CED 0 CO
D,J K
M

AL

01

CNC-OPERATION
INIGI

X

ViZ !Fx

A01 WRONG G/M INSTRUCTION

Data Input,

What happens when wrong data is put in — Alarm sign

We put in a X-value 50000, i.e. for the
cross slide a traverse path of 500 mm.
1. The secretary (interface element) reports:
They want X = 50000!
2. The director (central processing unit,
microprocessor) asks his specialists:
Can

we execute X = 50000?

3. The specialists (operating program)
answer:
No, Mister Director! X 50000 is too
high!
4. The director instructs his speaker
(output. element):
Tell them out there, we cannot do it!
X 50000 is too high, put in alarm sigp
A02!

Data input

What happens when wrong Data is put in?

Data on digital read-out

Data Input:

Central processing
(Director)

Operating program
= EPROM
(specialists)

Output element
(Press.
Speaker)

Alarm-survey, inputs

Alarm Signs
(Survey)
A00: Wrong G/M instruction

A8:

Tape end with tape operation SAVE

A01: Wrong radius/M99

A9:

Program not. found

A02: Wrong X-value

A10: Writing protection active

A03: Wrong F-value

All: Loading mistake

A04: Wrong Z-value

Al2: Checking mistake

A5:
A6:

M03 instruction missing

A7:

A13: Inch/mm switching with full program memory

M30 instruction missing
No significance

A14: Wrong mill head position/path unit
with LOAD 1. /M or ---1 /M
A15: Wrong Y-value
A16: Cutter radius data missing
A17: Wrong subroutine
Ale: Movement cutter radius compensation smaller 0

Possible Inputs
(otherwise alarms possible)

Inch

Metric
Values

Values Fineness (inch)

Fineness .(mm)

XD

0-19999

1/100 mm

0-7999

1/1000

Xrd

0-9999

1/100 mm

0-3999

1/1000

YV

0-9999

1/100 mm

0-3999

1/1000

YH

0-19999

1/100 mm

0-7999

1/1000

0-7999

1/1000

A_

ZVH

0-19999

1/100 mm

Radii

0-9999

1/100 mm

0-3999

1/1000

D(X) milling cutter
radius with M06

0-9999

1/100 mm

0-3999

1/1000

F

2-499

mm/min

2-199

1/10/min

T(F) tool address
M06

.0-499

0-199

1

1

L(F) jump instruotion: G27

0-221

H(F) exit signs M26

0-299

J/K circular parameter

0-90

Alarm/Measures

Measures when Alarm appears
Alarm is on

REV

1NP

Alarm indication disappears

DEL

Cancel wrong value

Put in correct value

INP

Store

Note:
- Alarm A13 can be cancelled only by operating the option switch metric/inch, horizontal/vertical.
- Alarm sign of tape operation please compare chapter tape operation.

A00—A01

A00: Wrong G/M instruction
Example: G12, M55

A01: Wrong radius/M99
+Y

X.1000
Y.1500

Possibility 1: Radius larger than admissible values
Possibility 2: Wrong value for end
coordinates PE of
quarter arc
Example: incremental value programming
N.,./G02/X1000/Y1500/
Coordinates X=1000/Y=1500 cannot be
end coordinate of quarter arc.

Example: absolute value programming

N
00

11
4

X

90
01
02
M30

Y

3000
4000

G

2000
1000

Z

0
30

1

F

100
100

I

Alarm

- In block NO1 point P1 is programmed.
- In block NO2 the quarter aro is
programmed (coordinate P2). The X,Y
values are correct.
The Z-value would mean a circular interpolation in space (helix). This the
computer does not know.
The
not
but
tic

alarm sign in this example does
appear when the program is put in
is on during the test run, automaor single block operation.

Explanation:

At programinput the computer just checks
the contents of one block, it does not
check the Z-value of the previous block.

A02—A04

A2: Wrong X-value
Compare chart for admissible values,

A3: Wrong F-value
Compare chart for admissible values.

A4: Wrong Z-value
Possibility 1: Admissible Z-value surpassed (compare chart)
Possibility 2: Threedimensional movement with absolute value
programming
This alarm appears only in the test
run, single block or automatic operation because the mistake cannot be
recognized at program input (computer
does not check contents of previous
blocks at program input).
Example:

0

11
10

.

1

1

,
,
90

L

00

00

x

0
E

3000 ,

Y

1500
0

z

F

300
(0)

Alarm

Monitor shows: Wrong Z-value; the computer accepts the - X,Y values since it
can carry out this interpolation and indicates the value shown last as being
wrong value.
Attention:
Maybe you wanted to program Z=0 and
Y1500 instead of 0. The computer cannot
know this. The computer indicates Z as
wrong value since it does not know your
thoughts.

Chapter 10
Casette Operation
RS-232 C Operation

Magnetic tape operation

Magnetic Tape Operation
The ta p e enables you to store programs
and to feed them into the computer memory.

1. Storing on tape
To transmit from computer memory to
tape: We call this mode of operation
SAVE or CHECK.

2. From tape into computer
To transmit the program from tape into the commuter memory: We call this
mode of operation LOAD.

Some data
- n.:mory capacity pet tape side: approx.
400 blocks.
- Operation time per tape side: approx.
90 sec.

Operation advice
1.

only

cassettes

. Erase: new cassettes completely (see
• page 7.23). The test impulse from
the final control o!1' the producer can
cause Alarm All or Al2.

3. Main drive motor must not run during
LOAD, CHECK, SAVE and ERASE operation.
4. Do not put down tape near main motor.

Modes of operation SAVE/CHECK

Magnetic Tape Operation
Transmission of a program from machine memory to magnetic tape
Mode of operation
SAVE = transmit from machine memory to magnetic tape
CHECK = control of transmitted (loaded) program

1. Press key[- ► iuntil word indication G lights up. Press key DELl.
The indicated value disappears from the digital read-out.

2. Put in G65.
Press keys Cry INP. -On the read-out you see C indicated.LL
magnetic cassette tape operation.

3. Press keyriTs7F4

On the read-out appears 51 TILL' j

4. Put in program number.
You can put in figures 000 099
co - 09
o - 999
The sequence of the figures can be chosen as you like. Example for
input of a program with number 76: Press keys

5. Press key LINPI.
The transmission / loading starts.
5.1. First free space on the tape is sought.
If there are not data on the tape, it will advance approx. 4 seconds and rewind approx. 2 seconds.

Band without data on:

4 sec. advance
2 sec. rewind'

-4Tape begin
Tape end

Transmission SAVE

Modes of operation SAVE/CHECK

If there are already data,programs loaded on the tape, then the tape
will advance to the end of the program which was loaded last. Then
adv. ance 4 seconds and rewind 2 seconds.

pro-rams a:ready
4

sec. advance

2 sec. rewind

2 sec.
Program 2

2 sec.

1
,''' .7 Pro g ram

j Tape begin

Transmission SAVE

3.2. Transmission operation SAVE

The digital read-out indicates

C
,A
SA is the abbreviation for ZAVE.
The program/data are saved from the machine memory - where they
could be deleted - onto the tape.
5.3. At the end of the transmission o p eration the ta p e rewinds tc the
tape start.

5.4. Control o p eration CHECK
Cj L L HJJJ
The digital read-out indicates
C
The data in the machine memor y are compared with the data loaded on
the tape.
If you have already programs loaded on the tape, then the digital
read-out will indicate these on the read-out whilst the tape advances. It will advance to the program loaded last and then the

CHECK will be carried out.

CHECK of loaded program

0-Program 3 L1 Program 2 Ff Program

L

!C

•

3

2;

G

1

1Y,!

6. After CHECK the tape rewinds. The program is loaded on the tape.

Please never take out tape during operation!

Mode of operation LOAD

Transmission of program from tape to machine memory
Mode of operation LOAD

1. Press key [-1►1 until word indication G lights up. If a figure of the
6-function appears, press key DEL. Then indication on read-cut
disappears.

2. Put in 065.
Press keys

EcIE

INP . Read-out indicates

ir- 1

1

3. Press key INP.
Read-out indicates
4. Put in number of program.
E.g. for program number 76 you press keys 1777iL On read-out; Lc

1

PL.

6:

5. Press keylINPI.
5.1. The program number CC is looked for.
If you have other programs on the tape already, then these numbers
appear on the digital read-out.
E.g. IC

P:214

or

[c

[715

5.2. Loading:
When the wanted program 76 is found, the loading operation starts.
On the digital read-out you see TE]
LO is the abbreviation for load.
5.3. After the loading is done, the tape rewinds. The read-out shows NOO.
Program number 76 is stored in the machine computer.

6. If you press keyISTART) then the program starts operating.

Program 76 1 Program 75 _LT- Program 74. j Tape begin
rrET

0

P

7151

is

L7
P„.._,

1_
4

Summary

From machine to tape

From tape to machine

SAVE, CHECK

LOAD

1. Put. in C, 65

r
,

I. P-- in G65

•

Press ITi,ii
1

Li

Press rINP!

3.

Press rP-Ticj

. q ii.F...L ;1

l I P i :177,

5. Press INP
Program is sought and will be
loaded in machine.

r---T ,i
iC1

,c

1
± LP i .L__.;

Ls1 i__L__:_i
5. Press [INPI

- Free space on tape is sought.
- Machine program is transmitted/
loaded on tape (SAVE)

Io j

IC
-

iSIAI

If program is loaded in machine, then read-out indicates:
N

•

lc

HI

1

If operation is through,
dication on read-out:

then in-

N

•

•

oo____J

Program can be started.

6.

j

Loaded program on tape is checked,
compared with machine program.
I

6.

--7-1

Put in program number

Put in program number

g

!-, ..1.1.:
.

t___,_i

2. Pressi

4.

•

6 If-i

L.

1c i

r,

r-T---m-

i

1,

io

0

Alarm sign

Alarm Signs — Tape Operation
(Summary)

A08 - Tap e end reached during loading of
program from machine memory to
tape only with node of operation
SAVE)
A09 - Selected program cannot be found
(mode of operation LOAD). Tape is
full. M06 is not put in in selected
program (mode of operation LOAD).
Alo - Writing protection active
All - Loading mistake
Al2 - Checking mistake

General
When switching off machine (also when current breaks down) an Interference pulse
is put onto the tape. This interference
pulse does not have any effect since the
loading start only after 2 seconds ct
ta p e advance.
Thus:
Tape has to be rewind (automatically). Never cake tape out during rewind operation.

Tape cegin

7
First program starts
after 2 seconds,

Empty space, interTerence pulses ineffective.

Alarm sign A08

Alarm sign A08:
Only when using mode of operation SAVE!

Reason

Measures

Tape finish during loading (SAVE) from
machine memory to tape.
(A08 only when using mode SAVE)

- Press FEEY and REV

Alarm sign A08 appears on digital read-

Tape rewinds to tape begin.
Digital read-out indicates N00.
- Put in new tape and repeat loading
operation.

out.

Program length

7t

j Tape begin
Tape end

Attention:
If you put in this tape and want to load
the next finished program transmit from
tape to machine memory) A09 appears No
program end found!

Alarm sign

Auti

Alarm sign A09:
Only when using mode of operation LOAD!

A09 - Reason 1

Measures

Selected program not found.
If you call a non-existing program number when loading ;from ta p e to machine
memory), then alarm A09 appears.

- PressiINP + 1REvl
The tape rewinds. The digital read-cut
indicates after chat NOO.

- Look for program on another tape (in
case you are sure you put it in).

Example: You Look. on this tape for prcno. n
Pr.NrhE.

A09 - Reason 2

Measures

Selected progran not fully on ta p e (m06),
since tape was finished when loading
from machine memory to tape (already in
mode o!f operation SAVE you had alarm A06).

- Press [INP1 +Fa]
Tape rewinds, read-out indicates NOC,

- Look for program on other tape (in case
you are sure that you put it in;

Example: You call. on program no.19

Program do es not nave M06, thus alarm
AOb was indicated aiready during mode of
operation SAVE.
[

19

IA

17

16

Alarm sign Al 0 Alarm sign Al 1

A10 - Writing protection active:
Only when using mode of operation SAVE and ERASE!

(A-11 ,

If you remove the writing protection
(i.e. the black caps) you cannot put
any more data cn this tape side.

crA*;

Measures:

If you put in such a tape side and
you want to transmit a nrogram from
the machine memory to the !ape, alarm

PressLTN +LREV1
Tape rewinds, put ii other tape or mount.
writing protection again,

sign Alo appears.

Al 1 - Load mistake:
Only when using mode of operation LOAD!

All - Reason 1

All - Reason 2

Motor is switched on or is being
switched on during lading (cape-machine).
The . program on the tape was not destroyed by switching on the motor.

c_'estrc,,yed. The
The program on the tape
reasons for it could be a mechanical
fault on the tape, a power failure - or
the machine was switched off when tape
was not rewound.

Measures

Measures

- Switch off motor
- Press FUTP + REvj

Transmit program t.d new tape.

The tape rewinds, the read-out indi-

cates NOO.

- Repeat loading operation.
- If you have All indicated also with
the following loading operation,

please see reason 2.

Summary measures
ALARM All

Repeat loading

N•1 ,,JI,Arm All

Alarm All

Reason was interference when
loading

Reason was mistake ,„7,n tan€

Alarm sign Al 2

Al2 - Check mistake:
Only when using mode of operation CHECK/SAVE!

Possible reasons:
- Tape faulty
- Interference p ulse: main mGtor: switc.hed
on, short power failure, interference
poise from electrial cond ...:.ctor flghtfling, switching on of soldering transformer
The interference pulses can happen both
when using mode of oberatIons SAVE or
CHECK.

Alarm sign Al2 in mode of operation SAVE - Remedy
Store program under another number.

Explanation:

Measure:

You cannot delete the false program just
by its own. Thus you have to give to
this program a new number, if you store
in on the same tape. If you would . use
the same program number, then alarm All
would appear when loading (tape - machine) since only the first one of two
identical program numbers can be called
on.

,1+ ri5571
- Put iniETT
out shows NOO.

tape rewinds, read-

- Put in same program under a new number.
- If alarm Al2 appears again, then tape
is defective.

Interference during SAVE
17

Same program has to be put in under
new program number.
•

Alarm sign Al2

Alarm sign Al2 in mode of operation CHECK

During CHECK operation there may occur
an interference impulse and alarm sign
.Al: will be indicated, without a defective tape being the reason.
Check:
- Press INP +
Tape rewinds to begin, on read-out NOO.
- Load tape into machine memory. If
there is no alarm All when loading,
then the program is o.k.
- During .Loading All is indicated: the
following is necessary - New tape, delete complete tape or put in program
anew under another number.

Measures - Summary

Repeat loading

N

NNN

4110-

No

alarm Ali:

Tape c.k,

Alarm All:
Tape defective
- New tape
- Delete tape
- Put in program under another
number.

Mode of operation ERASE

Mode of operationERASE (Erasing the tape)
1. Press :-Ieyr-47:1 ut1woLci,nedcation
figure of
C, lights um. IF you she
a C-funotIon indioated or ti:e diginal read-out, then pr,s,17,!.6tEl
Pur in GES
Pfess

INPoon the

I

diF.P

l

w

see

amp time,
1
- Pres . 747 + LDElf,

L
ay ye ' 4 :3ee
c•n the
The tape 15 erased.
After tnat the read-out shows NGC

Program Interruption during Tape Operation
Only when a g ing mode of operation TOAD,
CHECK, ERASE,
Program ihnexiruiii:...n

L ---

PressINP + REVI
Tape rewinds to rape begin.

Why program interruption?
When using mode :.)L operation LOAD:
If you find cut that•you caned a nonexisting program. If you press iiP +
the tape wilL not a6van.i:e to the
nape end but rewin.ii immediately.
When using mode of operation CHECK:
If you do not want to w,utt for CnECK
operation.
When

mode of peratlon

IL is enough that you e rase atoc.t lo
seconds. When loading anew the tape
machine will erase a:rotca1i y all
other remaining tat.

Putting in the tape

When putting in the Tape, pay Attention:
1. Putting in with left spool full
- I: you. switch off the machine, the
tape advances i second.
1 sec
Tl

- if you switch on the machine, the motor rewinds the ta p e 2 seconds. So it
is made certain that the tape is at
the ver y begininq.

2. Putting in with right spool full

O

C

0‘

__

- If you put in the tape and Program
G65, then the tape rewinds to the b gigining.

- If you put in the tape and not program
G65, and switch on and off the machine,
the following happens:

Switch on:

Che tape rewinds 2 seconds.
Switch off:
The tape advances I second.

1

If you carry on like this, the tope
moves further through the switching on
arj
a;ld .;:c)
get. ar interrer7-1c
the tJpi, A sct:re
tegistered.

RS 232 Mode

RS-232 C Operation — G66
V24 Operation
20 mA Operation

RS-232 C is an international standardized
Interface.
It is an Interface for information interchange. Via this Interface data can be
transmitted to peripheric apparatus and
vice-versa.
The data are transmitted via a cable. For
the specific apparatus a cable has to be
connected by an expert.
The description how to connect cables are
found in the wiring diagrams of the producers.

Some Examples
Connecting a paper tape
puncher and paper tape reader
The program of the Fl-CNC can be punched
on a paper tape:
Vice-versa:
From a paper tape the program can he
transmitted to the F1-CNC.

Printing a program
Via the RS-232 C Interface the program
in the Fl-CNC can be printed on a list..

Connection of computers
Via RS-232 C computers and computer
systems can be linked to the Fl-CNC.
Programs can be transmitted to the
Fl-CNC and vice-versa.
For computer connection a specific
Software is necessary.
The•Software is an encoding information
which translates the code of the computer to the code of the machine. This
Software has to •be written by an expert
for the specific computer type.

KS 232 Mode

Activating RS 232:
RS 232 is activated via G. G66 does not enter the memory, it is a switching function.

Examples:
• Transmission from paper tape
to memory of F1-CNC
(With Request to send signal)
Switch to CNC-mode (memory mus t- be emptyY
-

insert taper tape

-

Start paper tape reader

1. Program G66
a a c. a a a
2. PressI.
On the display appears
A is the abbreviat.icn for ASCII r, American Standard Code for Information interchange(

oacooci
3. Pres clEETP
0
The display shows
J-0 . = LOAD
The program I transferred. At the end cf
CO
the tra:7:sfer the displa y snows, N

RS 232 Mode

• Transmission from paper tape to F1-CNC
(without Request to send signal)

-

Insert paper tape
Switch to CNC-mode

1. Program G66
O 0 0 0 0

2. Press INPI The display shows

A

3. PresstiNL The display shows I

A

4. Start paper tape

O 0 0 0 0 0

L 0

reader xtransmission

begins)

• Transmission from F1-CNC to paper tape
(with or without Request to send signal)
CNC-mode
-

,c;c6

:paper tape
Start caper tape puncher
Insert.

1. Program G66
000000
2 Press IINP . Display shows
j.

iA

3
splay shows rA

essJFWD.
(SA = SAVE:
The ',p aper tape is punched.

0

00
!
S A I

c c o

PROGRAM SHEET EMCO Fl CNC

Part Nr.

Part Name

Program Nr.

Name

Sheet Nr

Date

1 Li
I n

mm

E.

inch

Li

Part Nr.

Program Nf.

Name

Sheet Nr.

Part Name

Date

rnm

C

inch

0

(M)

X
(J) (0)

(K) (s)

z

Fiemarhs

. 111
II
11
111
Ird
1111
IN
Melo
111111

111

Part Nr.

Program Nr.

Name

mm

Part Name

Pete

E

inch

q

N

X
(M)

(D)

(K) (S)

Part Nr.

Part Name

Program Nr.

Name -

(L) (1)(H)

Sheet Nr.

Date

Remarks

mm
inch E.

Tool Data Sheet
T1

T2

T3 -

T4

T5

T6

T7

18

d
2

F
t
S
HZ
HzK I
d
D
F
t
S
HZ
HzK

(mm)
(mm)
(mm/min)
(mm)
(U/min) ..... ...
(mm)
(mm)

Cutter dia.
Cutter radius
Feed speed
Max milling depth
Spindle speed
Difference measure

Start position


-4-Y/)

+241

+Y

Ir
ille


I1
,

Obb'
+X

V11110,

Zero•point offset (G92)
X

mm

Y

mm

Z

mm

Drawing no.:
Denomination:
Workpiece material:
Program no.
Name:
Dale:

Tool Data Sheet
T1

'

12

T3

T4

T5

I

T6 •

T7

18

d
F
t

S
HZ
HZK
Cutter dia.
(mm).
.
(mm)
Cutter radius
Feed speed
.... (mmimin)
F
Max. milling depth
. (mm).
t
S .. ....... .. ... (U/min) . ...... Spindle speed
. (mm)........ .... Difference measure
HZ
HzK ... ,...... (mm) .... .. ..... Corrected difference measure
d
0

Zero-point of workplace
Start position



+Zei.

+Y
+X

„,...40
:4

VIINOINgis,

Zero-point offset (G92)
X

mm

Y

mm

Z

mm

Drawing no.:
Denomination:
Workplace material:
Program no.
Name:
Date:

Tool Data Sheet
Ti

d
D=

T2

13

T6

T5

T4

17

TB

*

F
t
S

HZ
HZK
Cutter dia.
(mm):

0

Cutter radius

F ......... ,,,,,,,,, (mm/min)

Feed speed

t•


+Z

Max. milling depth

5 .., ..... . .... .:

(mm) ,,,,,,,
(U/min)
(rnm)

Difference measure

Hzi

(mm).


-I-Y6

+Y

I

.0.‘
4

Spindle speed

Hz

-

VIIIIIIII.*
+X

Zero-point onset (G92)
•

Start position

X

mm

Y

mm

Z

mm

Drawing no.:
Denomination:
Workplace material:
Program no
Name.
Date:

+X

•

1 .

I I
t1:1

•

_2;1

-1

••

•

-

•

r•

1713:t
--L3

•

Pemrograman cnc tu 3 a

More Related Content

What's hot (18)

Similar to Pemrograman cnc tu 3 a (20)

More from Alen Pepa (20)

Recently uploaded (20)

Pemrograman cnc tu 3 a