Study on tracking precision characteristics of ball screw feed system under different set-trajectory conditions

Ball screw feed system is an important part of high-grade numerical control machine tool, and its motion accuracy determines the processing accuracy of multi-axis machining machine tool. In the high-speed and high-precision ball screw feed system, its set-trajectory parameter is an important factor affecting the motion accuracy. In this paper, a semi-physical electromechanical coupling simulation model of ball screw feed system was built based on Simulink and Simscape, and motion accuracy simulation and analysis were carried out considering different command trajectory parameters. The results show that the position, velocity, and acceleration of the command trajectory have an important impact on the motion accuracy of the ball screw feed system. Therefore, in the multi-axis linkage machining machine tool, reasonable planning of the feed system trajectory parameters is of great significance to improve its motion accuracy.