Influence of acceleration on the Cmms accuracy in fast measuring

Abstract

This paper presents a theoretic and practical approach to confirm the dynamic errors induced by acceleration on CMMs during fast measuring. To simplify, a physical model, a mathematical model of the bridge component and the prismatic joint that move along X axis of a bridge CMM are presented. The research points out that there is sure to be the dynamic errors when there is acceleration. This has been  demonstrated by the simulation of the errors on the tip probe by Matlab sofware and the experimental results are obtained. The dynamic errors will decrease  the accuracy of CMMs so it is necessary to make out a compensation software to keep up the the accuracy of the measuring results.