Development of linear-motor-driven NC table for lathe turning of 3D surface

Abstract

A new NC table driven by twin linear-motors has been developed for us machining curved surfaces by lathe turning. The key factor for this turning method is to trace trajectories on a designed surface. The NC table requires a dynamic response that leads to a rapid motion with high acceleration and jerk. We propose a new NC table with acceleration and deceleration of more than 10 G with the use of a twin linear-motor, this table enables high-speed contouring machining. This study describes the dynamic performance and vibration control of the tandem table developed is reported. Motion trajectories and vibrations are evaluated from the measurement results. The capability and effectiveness of the NC table developed for machining 3D surfaces are also reported.