FEATURES OF CNC MACHINE BY G.DINESHPIRAN
- 1. Excel polytechnic college DEPARTMENT OF MECHANICAL ENGINEERING
- 3. Title : FEATURES OF CNC MACHINES Subject : SPECIAL MACHINES Section :C Department: Mechanical Member :DineshPiran G :Arithas :Anbu selvan . V :damchuilang gangmei :dheeraj kumar rajak :elakkiyan . P
- 4. CONTENTS • INTRODUCTON • DIAGRAM • FEATURES • EXPLATION • CONCLUSION
- 5. INTRODUCTION Numerical control is in automation where controlling of machine tool is by means of prepared program containing series of numbers. These numbers define the required position of each slide, its cutting speed etc…. The programme is designed for a particular job.
- 6. diagram
- 7. Features of cnc machines Central processing unit Memory Input / output interface Controls for machine tools axes & spindle speed Programmable logic controller
- 8. CPU = CENTRAL PROCESSING UNIT The central processing unit is the brain of the MCU. It manage other components in the MCU with the help of software contained in the main memory. The control section retrieves commands and data from memory and generates signal in the MCU.
- 9. MEMORY It can be divided into main memory and secondary memory. The main memory consists of ROM {Read Only Memory} and RAM {Random Access Memory} devices. Operating system software and machine interface programs are generally stored in the RAM.
- 10. INPUT / OUTPUT INTERFACE The input / out put interface provides communication between the various components of the CNC system, other computer systems and machine operator. The machine operator communicates to the CNC system through the control panel. Display is for communication of data and information from the MCU to the machine operator.
- 11. Controls for machines to axes and spindle speed These are hardware components that controls the position and velocity of each machine axis as well as rotational speed of machine tool spindle. The control signals generated by MCU must be converted to the position control system used to drive the machine axes. Spindle speed controls components in the MCU consists of a drive control circuit and a feed back sensor interface.
- 12. PLC = PROGRAMMABLE The programmable logic controller is used to manage the input / output interface for auxiliary functions such as logical sequencing, timing, counting and arithmetic functions. These auxiliary functions are generally ON / OFF actuations, interlocks and discrete numerical data. PLC can be reprogrammed according to the changes in the control functions.
- 13. Conclusion Further analysis shows that the cost initially will be high but the profits will grow once everything is operational. The final consultation would be to agree with implementing these machines into the company.