automated technological garment machineries.ppt

8. Automated garment defect inspection system
The basic level - Manual Inspection
Simple entry level machine,
Low cost, a fabric inspector pulls the fabric over the lighted inspection table and the defects are
located, marked and recorded on an inspection form manually.
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The intermediate level - Semi-automatic inspection
•Power driven
•Precise speed control and proximity sensors to control the uniformity of edges, with an auto-stop option.
•Can measure length of the inspected fabric as well as monitor the width of the fabric
•‘Fabric inspection defect analysis software’ (FIDAS) could be installed to document defect pattern for analysis
and decision making,
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Advanced level of technology: Automated Visual Inspection
The image of
the fabric
Threshold digital
image in grey shades
software to read and
differentiate between the image
of the defect and the fabric
Software marks the region and its location and stored into the
data.
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CNC machine
Eléments of a CNC Sytem
Input Device
Machine Control Unit
Machine Tools
Driving System
Feedback System
Display Unit
Working principles of a CNC Sytem
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Fabric spreading
• Main operation in garment industry
• Unwinding large fabric rolls onto long, wide tables in
for cutting each piece of garment
During Spreading –
 Alignement of plies,
 Elimination of fabric defects/flaws,
 Correct ply direction,
 Correct ply tension and
 Make fabrics flat and,
crinkle & crease free
Different Fabric spreading
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Manual Spreading Machines
Operating Procedure:
 Same as Manual Spreader
 Movement along the table and fabric
 Pulling can be controlled by buttons
Advantages:
Easy to operate
Low investment
Suitable for small scale garment industries
Limitations:
Speed limitation
Skilled labor required to operate
Chances of improper selvedge alignment
Small roll size
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Semi-Automatic Spreading Machines
Operating Procedure:
Same as Manual Spreader
 Movement along the table and fabric
pulling can be controlled by buttons
Advantages:
Fast and economical
Proper selvedge alignment
Ease to operate with electronic clutch
Limitations:
Fabric roll loading, cutting is still manual
Not suitable for large scale manufacturing houses
Small roll size
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Fully Automatic Spreading Machines
 Automatic loading/unloading device for fabric rolls
 Automatic roll turning arrangement for face to backlay
 Automatic leveling device for fabric edge alignment.
 Automatic cutting device at the end of a run
 Automatic tensioning device to control fabric tension
 Automatic lay height sensing elevator
 Programmable lay length, ply height and step-laying
 Spreading seeds up to 140 m/min
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Fabric cutting machine
Manual Cutting
( scissors, cutters)
Semi-Automatic
(Round knife cutter, straight knife, band
knife)
Automatic
(CNC, Laser, Plasma, water-jet)
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Advantages of CNC fabric cutting machine
Most accurate fabric cutting
Flexible enough for penetration and movements of knife
Create a vaccum to hold the fabric firmly and reduce the hieght of the lay
Ideal for notch making with the required depth
CNC fabric cutting machine
Component of CNC fabric cutting machine
Bristle bed
Vaccum system
Pre-sealer (Polyethylene sheets)
Perforated paper
Automatic sharpening of Blades
CNC programming
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Sewing machine
Two types of sewing machines (Based on operating system)
Manually operated sewing machines :
 Driven by physical energy.
 Used for domestic and tailoring purposes.
 Less production, but more laborious.
 Low cost.
Electrically operated or Industrial sewing machines
(Semi-automatic electrical or Computerized sewing
machines):
 Usually driven by electric power.
 High productivity.
 Used in garments industry.
 Cost is high.
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Computerized sewing machines
 Used for very fast and accurate sewing.
 Very expensive and require very efficient operator,
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automated technological garment machineries.ppt

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