Simple CNC lathe, also known as economic CNC lathe, is developed on the basis of ordinary lathe. Its automatic control system is mainly composed of single-chip microcomputer. Through the control program, it controls the longitudinal and transverse feed device and tool changing device of the machine tool to automatically complete the processing of parts. Therefore, the simple CNC lathe is still mechatronics equipment, so when there is a failure, it should be analyzed comprehensively from the mechanical structure and electrical control of the machine tool.
After the program runs, the stepper motor does not rotate, which is generally caused by the phase failure of the stepper motor or its control system. It may be the fault of stepping motor itself or its driving circuit. First of all, check that the connection plugs of the stepping motor are in good contact. If the contact is good, the motor without fault can be replaced to verify whether the motor is in good condition. If the motor can not work normally after replacement, it indicates that the control part is abnormal. It can focus on checking the high-power triode and its protective element release diode on the drive board.
