Patent ID: 7599813

Claim:
A method for determining at least one space coordinate of a measurement point on an object to be measured, comprising the steps of providing a probe head arranged on a displacement mechanism which comprises a first and a second support movable parallel to one another along a first axis, the first support being actuated by a first drive and the second support being actuated by a second drive mechanically separate from said first drive, for moving said displacement mechanism along said first axis, approaching the measuring point with the probe head, determining a first displacement position of the first support and determining a second displacement position of the second support, determining an actual difference value representative of an actual difference between the first and second displacement positions, providing a static difference value which represents a long-term static difference between the first and second displacement positions, subtracting the static difference value from the actual difference value in order to obtain a dynamic difference value, and determining the space coordinate of the measurement point as a function of at least one of the first and second displacement positions, wherein the two drives are controlled by a common regulator which generates a separate drive signal having associated therewith a separate setpoint value for each of said first and second drives as a function of the dynamic difference value.