Cutter path preview for contour machining based on efficient identification of motion error sources

This paper presents an efficient approach to the identification of the moti on error sources in CNC contour machining. The motion error sources include the mismatch of feed drives, the friction disturbances and the cutter path curvature. Their effects on the contour error in linear and circular motio ns are analyzed, respectively. On the basis of the analysis, the procedure for the identification of these error-source effects is developed. With the identification results, the cutter path trajectory can be previewed before the real run.