Research on Servo Transmission Control System of Laser Micro-Texture Machining Machine

Abstract

In the process of laser surface micro-texture processing, the instantaneous speed and instantaneous acceleration of the moving machine tool are high, the positioning error and repeated positioning error are difficult to control, and the precision of laser micro-texturing processing cannot be guaranteed. The dynamic model of the machine tool servo system is established. Based on the model, the error compensation scheme of the control system is designed. A speed and acceleration composite feedforward compensation PID control strategy is proposed. In order to illustrate the superiority of the proposed position accuracy compensation method, the PID control effects before and after compensation were compared. The results show that the position error of the system is reduced from 4μm to 1μm before compensation, and the repeat positioning accuracy is improved by 50%. Experiments show that this kind of control strategy can effectively reduce the position error of laser micro-texturing processing system, and has higher position tracking accuracy and repeat positioning accuracy, which satisfies the system’s demand for high-precision positioning, and is the surface micro-texture morphology. Performance studies provide more sophisticated machine tool servo control strategies and higher laser surface micro-texture machining accuracy.