Error identification method and error identification system for machine tools

摘要

PROBLEM TO BE SOLVED: To also simultaneously calibrate a diameter/length correction value of a position measurement sensor when identifying a geometrical error of a machine tool from a position of a measured jig by measuring the measured jig while using the position measurement sensor.SOLUTION: A length correction value of a touch probe is calibrated in S1, and a diameter correction value of the touch probe is calibrated by measuring an initial position of a target sphere in S2. Each target sphere center position and a touch probe distal end position estimated under a preset measurement condition are calculated by using the initial position of the target sphere and the length correction value of the touch probe in S3, and a command value list is created from calculated coordinate values. The touch probe is brought into contact with the target sphere based on the command value list in S4, and a center position and a diameter of the target sphere are calculated by correction using the length correction value and the diameter correction value. Identification calculation of a geometrical error of a machine is performed based on a coordinate value of a center position of the target sphere or command values in S5.SELECTED DRAWING: Figure 11