Patent ID: 7748251

Claim:
A circuit configuration for ascertaining a tilt error in connection with a position-measuring device having at least one incremental track on a measuring graduation readable by a scanner, (a) the scanner movable relative to the measuring graduation in a measuring direction, (b) the scanner guidable along the measuring graduation, (c) the scanner rotated with respect to the measuring graduation by an angle of misalignment that is changeable during the relative movement, (d) the scanner including a first scanning region and a second scanning region spaced apart from each other in a direction perpendicular to the measuring direction, (e) upon reading the at least one incremental track, at least one first position signal is able to be generated by the first scanning region and at least one second position signal is able to be generated by the second scanning region, the circuit configuration comprising: an arithmetic unit configured to generate at least one tilt-error signal having an amplitude based on an angle of tilt that is a measure of the angle of misalignment, by addition and/or subtraction of the at least one first position signal and the at least one second position signal.