Calibration of co-ordinate measuring machine by self tracking laser interferometer (Laser Tracer)

Abstract

 In this paper calibration procedure is presented for calibration of CMM for Geometrical Errors (21 Kinematic parametric errors) by Single self Tracking laser Interferometer (Laser TRACER). Laser tracking system concept is based on interferometric displacement measurement between reference points that are fixed to the base and offset points fixed to the machine head. The laser tracking system can measure three-dimensional coordinates based on the principle of multilateration with high accuracy. In this study, we measured 3D coordinates using the laser tracking system and estimated 21 geometric errors (parametric errors) of the CMM. Additionally to confirm the validity of the proposed procedure, the some of the parameters have been measured by laser measurement system. Result by the Laser TRACER and Laser Measurement system showed good agreement.