Patent ID: 6460261
Filing Date: 2002-10-08
Classification: G01B,G05B

Abstract:
A measuring method of V-groove shape for scanning and measuring a V-groove of an object to be measured by using a scanning probe for measuring position, while rotating the object by a rotary table, with the object having a spiral V-groove fixed on said rotary table, comprising:controlling a measuring element direction by aiming at keeping constant a vector projected on a table plane of the rotary table of a direction vector from origin of the object to the measuring element of the scanning probe as seen from a machine coordinate system; controlling a rotary table radius constant scanning of which a confinement plane is a cylindrical plane; and controlling a two-flank contact scanning for causing said measuring element to contact with two flanks for composing said V-groove, wherein a V-groove rotary table scanning control is performed while keeping said measuring element always in contact with the two flanks for composing the V-groove.