What is CNC?
Early machine tools were operated by craftsmen who decide many variables such as speeds, feeds and depth of cut, etc.
With the development of science and technology, a new term, numerical control(NC) appeared. Controlling a machine tool using a punched tape or stored program is known as numerical control. When numerical control is performed under computer supervision, it is called computer numerical control(CNC).
Computers are the control units of CNC machines, they are built in or linked to the machines via communications channels. CNC means the operation of machine tools and other processing machines by a series of commands of the tool to the work-piece. An organized list of commands constitutes a CNC program. The program may be used repeatedly to obtain identical results. When the job changes, we can only change the program of instructions. The capacity to change the program for each new job gives CNC its flexibility.
CNC Machine Tool
CNC technology is being used on all types of machine tools, from the simplest to the most complex, including the single-spindle drilling machine, lathe and turning center, vertical or horizontal-spindle machine center and milling machine, punches, electrical discharge machines(EDM), flame cutters, grinders and testing and inspection equipment. In general, any CNC machine tool consists of the following units: CNC device, servo drive system including driver and servo motor and machine.