Abstract: To the manufacture of non-circle section parts, the conventional feed system hasn’t satisfied the requirements of many kinds, high precision and high frequency respond servo control. Linear motor is new-style servo feed drive equipment, which is applied widely. The application status quo of linear motor is summarized, the basal principle and specialty of linear motor is introduced simply in home and broad. In the precise manufacture experiment of elliptic parts surface, the problems of linear motor’s servo control technology and anti-magnetism are researched by using time-base method of PMAC. The results of research promote the application of linear motor in the high-speed precise NC machine tools.

Key words: Grinding, Linear motor, PMAC, Time-base method