Effect of ambient temperature on machine tool compensation functions

Abstract

Volumetric verification is increasing daily its relevance. However, as it is based on mathematical compensation, it does not model only the influence of the machine tool’s geometric error to verify, but the total error of the data. Among all error sources, thermal variations due to changes in environmental conditions strongly affect MT position accuracy. This paper studies how verification changes affect compensation functions based on a modification of machine tool kinematic model and a generator of synthetic data. It takes into consideration the influence of the measurement noise on verification too. Moreover, the paper also studies how differences between verification and working conditions affect the accuracy of MT compensation functions. To do that, a brief explanation of the developed algorithm is presented.