Research on Backlash Compensation Method of Semi-Closed-Loop Servo System

In order to improve the machining accuracy of CNC machine tools and the phenomenon of large backlash error at the commutation point in the actual machining process, a ball screw feed control system model with backlash and friction was constructed. The actual machining process of the machine tool was simulated based on this model. The feed-forward error compensation method was used to compensate the backlash error in the simulation. The compensation effect under different compensation times was studied to find the optimal compensation time. By comparing the trajectory error and following error before and after compensation, the effectiveness of the feed-forward error compensation method in suppressing the backlash error was verified.