Currently, many enterprises in China are rapidly implementing intelligent manufacturing and developing towards highly flexible and efficient intelligent factories. Many high-precision, high-efficiency, flexible, large-capacity, and flexible processing machine tools adopt FANUC and other CNC systems; some also embed specific software such as gear grinding or pairing; some use Windows industrial control computers, some install special software such as size, shape, and position detection; some use human-machine interfaces, and some are equipped with programmable logic controllers. Some adopt servo amplifiers, servo motors, and ball screw pairs or worm gear pairs to form servo drive links, some adopt frequency converters and spindle motors to form spindle drive links, and some are equipped with auxiliary links such as hydraulic systems, lubrication systems, pneumatic systems, cooling devices, and chip removal devices. Therefore, accurate diagnosis and repair of high-precision CNC machine tools are becoming increasingly important.

How to accurately diagnose and repair high-precision CNC machine tools? 1、 Establish a modularized approach. Implementing modular maintenance for high-precision CNC machine tools can highly summarize the working principles of various CNC machine tools. Generally, digital logic electrical signals are used to control the movement process of the machine tool to obtain the required contour trajectory and corresponding control functions. A CNC machine tool is like a human hand, grabbing the tool or workpiece during operation, controlling them to move along the predetermined trajectory in the direction of movement, and finally processing the shape of the parts required by the user or achieving its intended use. Cutting tools can be torches, welding guns, spray guns, lathes, drills, milling cutters, grinding wheels, gear milling cutters / gear shapers and cutting needles. 2、 Propose a four-step maintenance standard. The four-step maintenance method is based on understanding the macro structure of the equipment ——based on the serialization and standardization of parts in the design and manufacturing process, it follows the four steps of "fault record in place, diagnostic analysis in place, fault repair in place, and repair record in place", and is a comprehensive maintenance method with comprehensive characteristics. 3、 Improve fault diagnosis and analysis technology. Fault diagnosis and analysis are key steps in the maintenance of high-precision CNC machine tools. Usually, a certain method or a combination of several methods is used to diagnose and analyze the fault, so as to quickly find the cause of the fault and eliminate it; targeted measures can also be formulated to prevent the fault from happening again.

High-precision CNC machine tool maintenance projects have achieved good social effects and significant economic benefits in enterprises. It can help maintenance personnel and students majoring in mechatronics engineering and CNC maintenance to strengthen their basic skills, simplify the machine tool fault analysis process, improve maintenance efficiency, shorten downtime, and enable them to quickly grow into innovative and composite high-skilled talents in modern enterprises.