The role of numerical control device NC read Ru procedures to convert it into machine motion control and accessibility requirements of the format, are then given to the feed motor control unit, the spindle motor control unit and the PLC, with a built-in PLC function numerical control device itself logical volume solver function, direct solver results give strong electric machine control system. Closed-loop control system of CNC machine tools will read the actual position detection device position signal issued, compared with the commanded position, the difference with the control of movement of the machine, you can get a higher position control accuracy.
Numerical control device composed of:
NC device receiving the control information from the information carrier and converted into a numerical control device operation (command) signal. Numerical control device by the input interface, controller, computing, memory and output interface has five major components
NC device hardware structure:
Early numerical control system, its input, calculation, interpolation, control by the tubes, transistors, integrated circuits composed of small and medium-scale logic circuit. Different CNC machine tools to design a dedicated logic circuit, poor reliability, functionality and flexibility is poor.
The use of minicomputers, the world's first CNC systems come out in 1970, 1974 United States and Japan have developed a microprocessor core of the numerical control system, and then have 8-bit, 16-bit, 16 bits, 32 and 64-bit CNC is applied. CNC has a small, compact, feature-rich, reliable and good.
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