CMM Volumetric Compensation: A Comprehensive Guide to Calibration, Error Mapping, and Correction

Coordinate Measuring Machines (CMMs) are central to dimensional quality assurance. However, like all physical systems, they are subject to geometric inaccuracies introduced through mechanical wear, assembly tolerances, and environmental conditions. To maintain traceable, high-precision measurements, these machines undergo volumetric compensation—a process that quantifies and mathematically corrects spatial errors across the entire measuring volume.