Error analysis and compensation method for motion errors of NC machine tools under cutting loads

WAN Haibo1,2, YANG Shixi1, GAN Chunbiao1
(1. Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China;
2. Department of Mechanical Engineering, Zhejiang Water Conservancy and
Hydropower College, Hangzhou 310012, China)

Abstract: In order to decrease the motion errors of NC machine tools under cutting loads, the online measurement technology and compensation method were investigated. the mechanism of motion errors under cutting loads was analyzed by setting up a dynamic model of spindle system. The linear relation between the cutting loads and the motion errors was established. A online measurement and compensation system was presented. The online measurement and compensation system were tested. The experimental results show that the compensated system can decrease the motion errors of NC machine tools.
Key words: compensation system; compensation method; cutting loads; motion errors