| 摘要 |
<p>The present invention relates to a coordinate measuring machine (1) for determination of at least one spatial coordinate of a measurement point (13) on an object (12) to be measured. The coordinate measuring machine (1) comprises a stationary base (3), a probe head (6) for approaching the measurement point (13) and a frame structure (15) for linking the probe head (6) to the base (3). Thereby, the frame structure (15) comprises at least a first and a second frame component (14, 22, 24) and at least one linear drive mechanism (2) moveably linking the first and the second frame components (14, 22, 24), for provision of movability of the probe head (6) relative to the base (3) in a first direction (X, Y, Z). According to the invention, a first reference path is provided by an optical reference beam (71), wherein the reference beam (71) extends along a guide of the linear drive mechanism so that the reference path is parallel to the first direction (X, Y, Z). Furthermore, at least one displacement sensor (9, 9a, 9b) is assigned to the reference beam (71), the reference beam (71) and the displacement sensor (9, 9a, 9b) being designed and arranged in such a way, that a displacement of the movable member of the linear drive mechanism relative to the first reference path is measurable being indicative of a translational and/or rotational displacement of the movable member from its ordinary bearing position.</p> |
