Method to detect geometrical variations of co-ordinate measuring devices or tools; involve measuring large number of lengths optically and determining two-dimensional network by trilateration

摘要

The method involves using one or more hinged length-measuring systems (1). A large number of lengths are measured optically to a reference element fixed to the tool or co-ordinate measuring device. A two-dimensional network is determined from the lengths by trilateration. The network is used to determine the geometry variations of the axes of the device to be tested.