CMM hardware error simulation for uncertainty evaluation

摘要

Uncertainty evaluation software based on Monte Carlo simulations is veryuseful for coordinate measurement machines (CMMs). These Monte Carlomethods use so-called virtual CMMs to simulate CMM measurement errors.Based on the simulated errors measurement uncertainties can be determined.This paper shows how CMM hardware errors can be modelled in a simpleand straightforward way. It considers CMM geometric errors as well as probeand articulating probe head errors. A key element of the presented method isthe selection of representative virtual CMMs based on a virtual ISO 10360-2 acceptance test. The method has been implemented in own developeduncertainty evaluation software but can also be used in other software. Resultsshow that very reliable uncertainty statements are obtained with thismethod.