Author(s)

A.P. Longstaff S.R. Postlethwaite & D.G. Ford

Abstract

Assessment of the volumetric accuracy of a machine with geometric compensation A.P. Longstaff, S.R. Postlethwaite & D.G. Ford Precision Engineering Centre, University of Huddersfield, England Abstract In a production environment it is important to be able to quantify the accuracy of all machines in order to estimate the production capability of the company as a whole. A measure of machine production capability is volumetric accuracy, which is effectively a combination of all sources of geometric error. The requirement for ever tighter tolerances on manufactured parts has led to the development of several systems capable of compensating for the effects of geometric errors inherent in machine tools and CMMs. This is usually achieved by making linear correction actuations to the orthogonal axes at each point throughout the working volume, dependent upon the magnitude of the sum of the errors in that axis direction. This paper discusses the problems involved in assessing the vol

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