Abstract
This paper proposes an estimation method for wear of ball screw and support bearing is proposed. In order to develop the estimation methods, special ball screws and support bearings with larger clearance are installed into a feed drive system, and the worn characteristics are investigated. In the estimation method which proposed based on the investigations, sine wave motions under various frequency are commanded into the feed drive system, and quantity of wears can be estimated based on amplitude of feed backed positions and current. It is experimentally clarified that the proposed estimation method can estimate the amount of the wear accurately.
