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ABSTRACT.IN THIS RESEARCH 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 (XI, YI, ZI). AFTER FITTING MATHEMATICAL MODELS THAT REPRESENT THE VOLUMETRIC ERROR COMPONENTS, IT IS POSSIBLE TO CONSTRUCT THE VOLUMETRIC ERROR MAP OF A CMM UNDER TEST. IN THIS PAPER, THE MEASURED DATA OBTAINED BY APPLYING A MODULAR SPACE FRAME ON A LK CMM ARE USED TO FIT MATHEMATICAL MODELS THAT REPRESENT EACH VOLUMETRIC ERROR COMPONENT. ALSO, THE PARAMETRIC ERRORS OF THAT MACHINE ARE DERIVED FROM THE VOLUMETRIC ERROR DATA. IN ADDITION, THE GRAPHICAL REPRESENTATION OF THE VOLUMETRIC ERROR DATA AND THAT OF THE PARAMETRIC ERRORS RELATED TO THE LK CMM ARE PRESENTED.
KEYWORDS RESPONSE SURFACE, CO-ORDINATE MEASURING MACHINES
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