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Good practice guides

CMM measurement strategies

GPG 41

This guide covers the selection of the number of measurement points when using Co-ordinate
Measuring Machines (CMMs) and gives advice on the compromise between accuracy and
speed. It provides guidance on sampling criteria for standard features and advice on
measurements that involve projections of features over long distances. It covers cleanliness,
part loading/alignment and the effect of temperature, surface finish and geometry on the
result. It also contains information on basic measurement principles, common measurement
requirements, CMM software functionality in relation to drawing requirements and good
metrology practice when using CMMs with CAD data to inspect parts.

CMM measurement strategies
20 Oct 2014
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