Patent ID: 6640607
Filing Date: 2003-11-04
Classification: B25J,G01B

Abstract:
A method of calibrating measuring machines, comprising the steps of:positioning a reference measuring machine previously calibrated and an object measuring machine to be calibrated in such a manner that a measurement space by said reference measuring machine is superimposed on a measurement space by said object measuring machine; acquiring first measurement values by said object measuring machine and second measurement values by said reference measuring machine each on plural points in said measurement spaces respectively by said reference measuring machine and said object measuring machine; and calibrating said object measuring machine based on said first and second measurement values, wherein said object measuring machine includes: a first base plate for mounting a work thereon; a first guide mechanism consisting of a first guide and a first slider located on the basis of said first base plate; a first scale for providing a first coordinate signal on detection of a movement of said first slider relative to said first guide; and a first sensor located on said first slider for providing a first detection signal, said object measuring machine processing at least one of said first detection signal and said first coordinate signal to measure a surface texture on said work, said reference measuring machine including: a second base plate for mounting said object measuring machine thereon; a second guide mechanism consisting of a second guide and a second slider located on the basis of said second base plate; a second scale for providing a second coordinate signal on detection of a movement of said second slider relative to said second guide; and a second sensor located on said second slider for providing a second detection signal, one of said first and second sliders having a reference device located thereon, said first and second measurement values are acquired as said first and second coordinate signals on detection of said reference device by said sensor located on the other of said first and second sliders.