Enhancement of Machine Tool Accuracy: Theory and Implementation

摘要

In the report the results are presented of a study on the enhancement of theaccuracy of a commercially available machine tool by software error compensation. First, the problem field has been outlined by a qualitative analysis of the main error sources. Based on this analysis the most significant error sources are identified as the geometric errors and the thermal behavior. Further study has been focused on the development of a model by which the effect of these error sources can be compensated. The effectiveness of the compensation algorithms has been verified. As a final test on the use of the devised compensation, several workpieces have been manufactured. The results show an enhancement of the practical achievable accuracy on a commercially available machine tool by a factor of 2. Finally, conclusions are drawn with respect to the achieved improvement in accuracy, and some recommendations are presented.