Patent ID: 9383198
Filing Date: 2016-07-05
CPC Classification: B23B,B23Q,G01B

Claim Text:
1. A method for reducing errors of a turning device in connection with a determination of coordinates of a work piece or with machining of the work piece, the turning device allowing a rotational movement of the work piece about a rotation axis of the turning device during the determination of the coordinates or during the machining of the work piece, which comprises the following steps of: measuring errors of the turning device due to differences between actual positions and ideal positions of the rotation axis and due to differences between actual orientations and ideal orientations of the rotation axis in a range of rotation angles, namely in different rotational positions of two parts of the turning device being moved in rotation relative to one another about the rotation axis, and corresponding error measurement values are obtained; determining expected error values of the turning device which are respectively expected for a relative working position and a working orientation of a coordinate measuring instrument for determining the coordinates of the work piece or of a processing tool of a machine tool for machining the work piece on the one hand, and the turning device on the other hand from the error measurement values; and determining from the expected error values of the turning device at least one working position and/or working orientation of the coordinate measuring instrument or of the processing tool, for which the expected error value of the turning device, under consideration of a predetermined measurement task for determining coordinates of the work piece or a predetermined machining task for machining the work piece is less than for other working positions and/or working orientations and/or satisfies a predetermined condition.