| 摘要 |
Calibration method for a coordinate measuring machine (1), the coordinate measuring machine (1) comprising a drive mechanism for moving a tool carrier (15) relative to a base (11) for approaching a measurement point and comprising a calibration laser head (20) implemented so and attached to the tool carrier (15) so that a laser beam (25), which is emittable by the calibration laser head (20,21), is swivelable around at least two basically perpendicular axes (X,Y,Z) and changes in distance are measurable interferometrically by means of the calibration laser head (20). A set of retro-reflectors (16a-d) is arranged in fixed positions relative to and/or onto the base (11). The method comprises emitting and directing the laser beam (25) towards a first of the set of retro-reflectors (16a-d), whereby a measuring path (26) is defined by the orientation of the laser beam (25), moving the calibration laser head (20) along the measuring path (26) so that the laser beam (25) is kept directed towards the first retro-reflector (16a) according to the measuring path (26) and the reflected laser beam is continuously received at the calibration laser head (20), measuring the change in distance to the first retro-reflector (16a) at a plurality of measuring positions along the measuring path (26) and gathering a machine position for each of the plurality of measuring positions, the machine position relating to a position of the tool carrier (15) relative to the base (11). |
