DERIVING THE PARAMETRIC ERRORS OF A CO-ORDINATE MEASURING MACHINE FROM THE MATHEMATICAL MODELS FITTED TO REPRESENT THE VOLUMETRIC ERROR COMPONENTS

摘要

In this paper, an approach to volumetric determination of CMMs, which permits interpolation between measured points, has been developed. Mathematical and statistical techniques, such as Response Surface Methodology, have been used to represent the relationship between each volumetric error component (Ex, Ey and Ez) at a point, within the measuring volume, and the co-ordinates of the point (X_i, Y_i, Z_i). Also, a method to derive the parametric errors of a CMM from the volumetric error data is presented.