Controller Design for Improving Synchronous Accuracy of 5-axis Machining Centers

Abstract

This paper proposes a controller tuning method for 5–axis machining centers which can improve synchronous accuracy. Velocity loop controllers are tuned based on the partial model matching method, and the positional loop gain is calculated based on the frequency response of the velocity control system. Feed drive systems including rotary axis were modeled and multi–axis synchronous motions were simulated. As the results from the simulations, it is clarified that the proposed tuning method can greatly improve the synchronous accuracy.