Calibration of Coordinate Measuring Machines Meeting the Requirements of ISO 10360-2:2009 at the Standards and Calibration Laboratory

A coordinate measuring machine (CMM) is a measuring system, with the means to move a probe system, to determine spatial coordinates on a work piece surface. It is a 3-dimensional measuring device for determining the physical geometrical characteristics of objects. To verify the performance of a CMM, it is essential to carry out acceptance tests and with subsequent periodic checks to it in accordance with ISO 10360-2, which is an international geometrical product specification standard for CMM testing. At Standards and Calibration Laboratory (SCL), a calibration method, meeting the requirements of the latest edition of ISO 10360-2, is developed using precision step gauges as the reference standards to calibrate CMMs with measurement results traceable to the unit of length (i.e. the metre). Method for estimation of measurement uncertainty is also developed in accordance with the JCGM 100:2008 (Guide to the Expression of Uncertainty in Measurement), ISO/TS 15530-1:2011 and ISO/TS 15530-3:2011 (Guidelines for the Evaluation of CMM Test Uncertainty).Learning Objectives: To develop methods for CMM calibration meeting ISO 10360-2:2009 and uncertainty evaluation in accordance with JCGM 100:2008.