Improvement of segmented bars for the verification of coordinate measuring arms

摘要

In order to verify the performance of articulated arm coordinate measuring machines, the standards/guidelines that address this topic require the use of different length artefacts. For instance, the volumetric test of ISO 10360-12:2016 requires measuring five calibrated lengths in seven directions (three horizontal, three diagonal and one vertical). If a ball bar is used to perform the test with each sphere measured with five points, then the test requires measuring 1050 points (7 directions x 5 lengths x 2 spheres x 5 points x 3 repetitions).