CNC introduction
*Define "NC Machine"
NC (numerical control) program is prepared and feed on tape and tape reader read that program and according to that program, machine work that is called NC machine.
* CNC machine
CNC is cutting machine used to cut hard material such as wood composites Al, steel ,etc
The main function of CNC system is the control machine tools which involves conversation of the part program instructions in to machine tool motions through the computer interface and servo system ,a CNC system has got the capability to conveniently variety of constrained unit.
*Type of CNC
1. machine tool control
2. in process compensation
3. Flexible programming and operating features
4. Diagnostics
#. Advantages of CNC machine
1. Reduce lead time
2. Increased production
3. Similar bach
4. Google storage cost
5. Reduce inspection
6. Longer tool life
7. Lower labour cost
8. Less skillsed operator
9. Less paper work
10. Less scrap
#. Disadvantages of CNC
1. High initial cost.
2. Higher maintenance cost
3. Costlier CNC personal
4. Increased unemployment
5. Planned support facility
* Application of CNC
The main application of computer numerical control are given as under
1. To minimise the lead time in manufacturing .
2. To manufacture such a parts which are complex in construction and it will not be possible
3. To give flexibility to machine tool to adopt such parts to manufacture which are frequently subjected to change in design.
4. To produce repetitive and precision quality parts in varying batch quantity.
5. To produce such parts where mistake in processing would be costly.
6. To manufacture parts
# industrial applications of CNC
1. Aerospace equipments.
2. Printed circuit board.
3. Coil winding.
4. Automobile parts.
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