ROUNDNESS MEASUREMENT DEVICE, AND METHOD FOR POSITIONING OBJECT TO BE MEASURED FOR ROUNDNESS MEASUREMENT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a roundness measurement device, together with a method for positioning a object to be measured for the roundness measurement device, wherein a to-be-measured object is easily and accurately positioned without the need for rotating a detector. ;SOLUTION: A roundness measurement device of detector-rotative type wherein a detector 14 rotates around the center of a rotation axis A comprises, while provided with the detector 14 which measures a distance from the specified rotation axis A to a peripheral surface of a object to be measured 3, an optical flux means which, allocated on the rotation axis A, lights an end surface 31 of the object 3, and a variable means 18 which changes a diameter D of an optical flux 171 from the optical flux means. Since the position of rotation axis A of the roundness measurement device 1 is definitely indicated on the end surfaces 31 of the to-be-measured object 3 by the optical flux means, the interval dimension between the detector 14 and the object 3 is not required to be confirmed for each specified angle, so positioning work is simplified.;COPYRIGHT: (C)1998,JPO