New linkage control methods based on the trajectory distribution of galvanometer and mechanical servo system for large-range high-feedrate laser processing

In this paper, a new laser linkage processing method based on trajectory distribution of galvanometer and mechanical servo system is proposed to achieve large-range high-feedrate laser processing. The proposed method can effectively improve the processing range, accuracy, and efficiency. Firstly, according to the processing trajectory characteristics of the galvanometer and mechanical servo system, a trajectory distribution filter algorithm is designed to reasonably distribute the interpolated trajectory to the equipment. Then, two linkage processing methods are designed based on off-line trajectory and real-time trajectory distribution. Moreover, an experimental platform consisting of the laser, galvanometer, and mechanical servo system is built, and experiments are performed on experimental equipment to verify these methods. Finally, the experimental data is collected at different processing feedrates, and the processing errors of two linkage processing methods and mechanical servo system processing are calculated and compared. The processing accuracy and effect of linkage processing are effectively improved. In addition, the processing effect of real-time trajectory distribution is also improved compared to the off-line trajectory distribution, which is simpler and easier to implement. These methods have been successfully applied to the large-scale high-feedrate laser processing equipment in the laboratory.