Patent ID: 8397394
Filing Date: 2013-03-19
Classification: G05B

Abstract:
1. A method for workpiece levelling, comprising: mounting a workpiece in a machine tool, measuring a position of the workpiece in its mounting and determining a translatory offset (xv, yv, zv) and a rotatory offset (λv, βv, φv) of a real workpiece mounting in relation to an ideal mounting from measurement results and from workpiece data forming an initial data set and related to the ideal mounting, the method further comprising: measuring plural surface points of the mounted workpiece in their position in space (xn, yn, zn) for obtaining another initial data set, obtaining plural varied data sets by varying the data of one of the initial data sets a plurality of times in accordance with plural translatory and rotatory displacements, for each varied data set and the initial data set on which they were based, determining a deviation measure for the respective surface represented thereby in comparison to a surface represented by the other of the initial data sets, determining the smallest deviation measure from the various deviation measures, and determining the translatory offset (xv, yv, zv) and the rotatory offset (λv, βv, φv) from the translatory and rotatory displacement of the data set having the determined smallest deviation measure.