| 摘要 |
A method of scanning the surface (S1) of a workpiece (W) using a coordinate positioning machine equipped with a touch trigger probe (20) is disclosed. The probe is driven in a circular path toward, or away from the surface (S1) dependent upon whether or not the stylus (22) of the probe (20) is displaced from its rest position. The radius of curvature of the circular path on which the probe (20) is driven is determined in accordance with an angle between lines joining the last three points on the surface (S1) measured by the machine. The radius of curvature of the circular path is reduced with increasingly acute angles. The speed of the probe is also determined in accordance with the angle between lines joining the last three points measured by the machine; typically as the product of a maximum designated speed and the scalar product between vectors defined by lines joining the previous three measured points. |
