1. The working principle of CNC equipment The working principle of CNC machine tool is to make qualified products (work requirements) according to the products that need to be processed (work requirements), through professional programmers to compile the processing program (set numerical control program), and then import the programmed program into the numerical control equipment, through the operator to apply the numerical control equipment and start working (numerical control equipment application), and finally make qualified products (work results). This is how CNC machines work. 2. The composition and function of numerical control equipment CNC equipment is mainly composed of input and output device, computer numerical control device, servo system and controlled equipment. An input/output device and a computer numerical control device, a computer numerical control device and a servo system, a servo system and a controlled device, a controlled device and a computer numerical control device may interact. Numerical control equipment is a kind of high-efficiency automatic processing equipment. Compared with ordinary equipment, CNC equipment has the following characteristics. (1) Strong adaptability; (2) High precision and stable quality; (3) High productivity; (4) Can complete complex surface processing; (5) reduce labor intensity and improve working conditions; (6) Conducive to production management.