Application of a high-precision Universal Measuring Machine in standards laboratory measurements

A computer-controlled high-precision Universal Measuring Machine (UMM) of advanced design is being applied to the calibration of high-precision artifacts in one- and two-dimensional space, aided by checks against master length reference standards. These artifacts, principally step-gages and roundness standards, require ratio-type techniques similar to those employed in calibration of electrical ratio devices. The application is yielding significant time savings and accuracy enhancement. Analytical power of the machine´s computer system simplifies data collection, improves computation of results, and permits deterministic analysis where best judgment has been the practice.