GEOMETRIC CALIBRATION OF CMMs USING 3D LENGTH MEASUREMENTS

F. P. d’Hooghe, P. Schellekens, L. Levasier

Abstract

This paper presents a new calibration method for larger size co-ordinate measuring machines (CMMs). This method provides 21 parametric errors by performing 1-dimensional length measurements in the workspace of a CMM. A special measurement set up is realised, which enables automated volumetric error compensation of CMMs at their production stage. Located in a corner of the measuring volume, this laser set up performs multiple spatial linear interferometer measurements by movement of a CMM automatically. In this paper emphasis is placed on; i) automation of spatial laser interferometer measurements, ii) minimising cosine errors by optimisation of the interferometer signal, iii) measurement strategy and iv) verification of the calibration.

Keywords

Co-ordinate Measuring Machine, volumetric calibration, parametric errors, interferometer

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IMEKO-WC-2000-TC14-P362.pdf

DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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