Patent ID: 7367133
Filing Date: 2008-05-06
Classification: G01B

Abstract:
1. A method for coordinate measurement at a workpiece by a device for coordinate measurement, which includes a probe head that generates a switching signal in response to contact with the workpiece, position-measuring units for each coordinate axis to be measured, a relative position of the probe head measurable with the position-measuring units, and a processing unit that functions in a discrete-time manner in time intervals of a controller clock signal, comprising: measuring position values in time intervals of a probing clock signal having a higher frequency than the controller clock signal of the processing unit; storing the position values in a position-data memory; measuring a time span between a pulse of the controller clock signal and an occurrence of the switching signal at the probe head in a time-measuring unit; and ascertaining, in one of (a) the processing unit and (b) the position-measuring unit, a position value from the stored position values in position-data memory closest to a time of the switching signal in accordance with the measured time span.