Study on a new method for measuring volumetric error of CMM

摘要

Coordinate Measuring Machine (CMM) is widely used as an accurate measuring instrument in manufacturing anddesign. Modern industry requires a CMM with higher accuracy and efficiency. The accuracy of CMM is influenced bymany factors such as volumetric error and dynamic error. The volumetric error is the major component of CMM's errorsin slowly probing while the dynamic error is not omitted during fast probing. Compensating the volumetric error is aneffective approach to improve the precision of CMM. The volumetric error must be measured and the model in theworking space of CMM must be set up while compensating. To measure the volumetric error, this paper proposes a newmethod for fast measuring 5 volumetric errors of a guide way at the same time. The error model is presented too. 3-beamlaser interferometer method is used to measure the volumetric errors. The method can also be used in measuring the errorin real-time dynamically. The research can be referred to design the super higher accuracy CMM and the precision CNCmachine.