Methods for Measuring and Compensating Ball Screw Error on Multi-mode Industrial CT Scanning Platform

Abstract

Abstract. Precision of ball screw had a great impact on the positioning accuracy of NC positioning platform. The lead error and backlash of ball screw, which could be accurately measured by laser interferometer, were two key factors affecting the positioning accuracy of NC positioning platform. By setting the compensation data in the numerical control system, significant improvement of the positioning accuracy of NC positioning platform could be achieved. A method for measuring lead error and backlash of ball screw by laser interferometer was introduced and another method for calculating compensation data basing on the results of measurement was putted forward. Experiments were carried out on a multi-mode industrial CT scanning platform to verify these two methods. And the positioning accuracy of multi-mode industrial CT scanning platform was advanced obviously by compensating ball screw lead error and backlash with the compensation data measuring by laser interferometer.

Verifying the Performance Characteristics of the (micro) Robotic Devices

“…As a suitable example of the mentioned behavior utilization of a motion reduction device can be studied when the high precision positioning with high payload is required. The common precise positioning device usually used a stepper motor with the positional encoder the no-backlash high ratio reduction gear and the ball screw [5], but the study [3] shows that the positioning errors from the ball screw are present. Consequently that the motion reduction compliant mechanism can be utilized as a device those potential positional errors can minimize (see Fig.…”