What parts does the numerical control system consist of? What are their respective roles?

Numerical control system is mainly composed of hardware and software. Its core is computer digital control device. Through the system control software and system hardware, it reasonably organizes and manages the input, data processing, interpolation and output information of the CNC system, controls the executive parts, and makes the CNC machine tool automatically process according to the requirements of the operator. The CNC system takes the computer as the control component, and the software of the CNC system resident in it usually realizes some or all CNC functions, thus controlling the movement of the machine tool in real time. As long as the control software of computer numerical control system is changed, a brand-new control mode can be realized. There are many types of CNC systems, including lathes, milling machines and machining centers. However, the CNC system of various CNC machine tools generally includes the following parts: CPU, ROM/RAM, I/O equipment, operation panel, display and keyboard, paper tape punch, programmable controller, etc.