Patent ID: 8229694
Filing Date: 2012-07-24
Classification: G01B

Abstract:
1. A coordinate measuring machine, comprising: a probe having a stylus comprising at an end thereof a contact point to be in contact with an object to be measured, a support mechanism that supports a base end of the stylus so that the stylus is movable within a predetermined range, and a probe sensor that detects a displacement of the stylus; a movement mechanism that holds and moves the probe; and a controller that controls the movement mechanism, the coordinate measuring machine measuring the object by moving the contact point along a surface of the object to be measured while forcing the probe against the object, the controller comprising: a displacement acquiring unit that acquires a displacement of the movement mechanism and the displacement of the stylus; a correction parameter calculator that calculates a correction parameter for correcting the displacement of the stylus acquired by the displacement acquiring unit; a corrector that corrects the displacement of the stylus acquired by the displacement acquiring unit based on the correction parameter; and a displacement synthesizing unit that synthesizes the displacement of the movement mechanism and the displacement of the stylus corrected by the corrector to calculate the position of the contact point, wherein the correction parameter calculator calculates the correction parameter based on a measurement condition in measuring the object.