NC Machine, NC stand for numerical control, this is also an automated machine but it can understand only either binary or numeric or in alphanumeric programs.
An NC machine has
Software
MCU (Machine Control Unit)
Machine Tools
It doesn’t have a servo mechanism there for it has no feedback system also it has no computer.
The program is typically stored in a tape with the help of special inserting device, the modification or changes in the program is a tough job in the case of NC machine.
Differences between NC and CNC.
NC MACHINE CNC MACHINE
NC stands the Numeric control machine. CNC stands Computer Numerically Control Machine.
This is not software driven. This is software driven machine.
It can not imports CAD files. It can imports CAD file and convert into part programming.
Operation parameter cannot be change. Operation parameter can be change.
It stores in Punch cards Memory. Directly stores in computer memory.
Machine cannot run continuously. This machine can run for 24 hours continuously.
Less flexibility or Computational ability. CNC machine having High.
Takes more time for executing the program. This machine takes less time as compared to NC machine.
High skill operator requires to operate NC machines. The semi-skilled operators can perform the operation on a CNC machine.
Less maintenance. High maintenance.
The maintenance cost is less. The maintenance cost is more.
Machining cost is less. Machining cost ismore.
Less Accuracy as compared to CNC Machine. Great accuracy.
Codes are Numeric, Symbol and letter only. Here the codes are G and M codes.
A single person can not perform several operations on different NC Machines. A single person can perform several operation on different CNC machine.
There no feedback system. Feedback syste