Motion Error Diagnosis and Compensation of CNC Electrochemical Machining Machine Tool
Aiming at the problem of motion error and motion stability of CNC electrochemical machining machine tools,a motion monitoring and error compensation system for CNC electrochemical machining machine tools is de-veloped.The system consists of a lower computer composed of PMAC control board(programmable multi-axis controller),a host computer monitoring software and a data acquisition system.Meanwhile,a multi-channel data transmission mechanism is constructed by combining multi-thread mode and queue technology,which realizes the functions of motion error monitoring,analysis,compensation and error alarm.The experimental results show that there are hysteresis and distortion in the data transmission during the movement of the machine tool.The speed error increases proportionally with the set speed,and the displacement tracking error accumulated.After diagnosis and compensation,the maximum speed error is reduced from 0.014 735 mm/s to 0.000 043 mm/s,the growth trend of displacement tracking error is effectively suppressed,and the motion accuracy of machine tool is signifi-cantly improved.