Patent ID: 7734438
Filing Date: 2010-06-08
Classification: G01D

Abstract:
1. A method for determining correction values for correcting positional measurement errors in a machine having at least one translational axis of movement, the machine having a mobile head and first position measuring devices in order to determine a spatial position of the head, the method comprising the steps of: moving the head along a defined path of movement having a plurality of sections, the head assuming a plurality of positions along the path of movement, recording a plurality of first position data at the positions of the head by means of the first position measuring devices, recording a plurality of second position data at the positions of the head by means of a second position measuring device, and determining a plurality of correction values as a function of the first and second position data, with the correction values representing an error profile along the path of movement, wherein a defined number of correction values is determined for each section of the path of movement, and wherein the number of correction values determined per unit distance of travel along said defined path of movement varies for each of said sections as a function of the error profile.