Research on the Integrated Design Method of “Motion Process, Electromechanical and Control” for CNC Machine Tool Feed System with a Focus on Time-Domain Accuracy

With the increasing demand for dynamic performance in CNC machine tool feed systems, existing design methods are facing significant challenges. Kinematic-based static design methods do not account for dynamic conditions during actual machining, while dynamic design methods based on natural frequency struggle to directly address users’ time-domain accuracy requirements. To address this issue, this paper proposes an integrated design method of “Motion Process, Electromechanical and Control”, which directly focuses on time-domain accuracy. The method takes the feed system’s acceleration and deceleration capability as the design basis, with the time-domain design objectives being a combination of position error, velocity error, and velocity fluctuation. After isolating the effects of servo control parameters, the paper investigates the influence mechanism of electromechanical matching under different motion processes on the time-domain accuracy of the feed system. The relationship between time-domain accuracy indicators and the physical components of the feed system is explored, and corresponding analytical and design methods are established. This research provides a new theoretical foundation for the design of CNC machine tool feed systems.