Accuracy of coordinate measuring machines - Characteristics and checking of characteristics - Acceptance and reverification tests for coordinate measuring machines of large dimensions
This guideline describes procedures for testing the performance of large coordinate measuring machines of various designs and makes. It applies to: - acceptance tests serving to verify compliance of the CMM and its probe with the manufacturer's specifications - reverification tests performed by the user for periodical checking of the CMM and its probe - interim checks performed by the user for monitoring the CMM and its probe in-between reverification tests. The guideline considers both hand-held and CNC-controlled coordinate measuring machines of single- as well as multi-arm designs, with or without probe, whose longest body diagonal is so large as not to allow at least 66% coverage by the material standards (gauge blocks and stepped gauge blocks) described in DIN EN ISO 10360-2. As a rule, this holds for CMMs whose longest axis exceeds two metres.