Characterization and calibration of coordinate measuring machines.

摘要

With the increasing use of three axis coordinate measuring machines (CMMs) for product acceptance, part characterization and/or part inspection, there is a corresponding need for acceptable methodologies to calibrate CMMs. Potential error sources in CMMs include scale errors and geometric imperfections as well as possible errors arising from environmental factors such as excessive vibrations or thermally induced structural changes. Although numerous methods for the calibration of CMMs have been reported, this paper will review two calibration methods. The first method is the American Standard for performance testing of CMMs and the second method is a parametric calibration with error compensation of CMMs. Whereas the first method can be used to evaluate the performance of two or more CMMs or for periodically checking a CMM. The second method is more advantageous for the calibration of high accuracy CMMs operating in controlled environments. 11 refs.