| 摘要 |
A method is described for using coordinate positioning apparatus, such as a machine tool, to measure an object. The method comprises the step of operating the coordinate positioning apparatus in a touch trigger mode to measure the position of one or more touch trigger measurement points (50; 100; 118) on the surface of the object. The coordinate positioning apparatus is also operated in a scanning mode to measure the position of a plurality of scanned measurement points (52) along a scan path on the surface of the object, the scanning mode measurements being acquired using a scanning probe (4) having an object- contacting stylus (12). At least one correction (&Dgr;i;V,R;&Dgr;r ) is then calculated that describes a difference between the touch trigger mode measurements and the scanning mode measurements. In this manner, touch trigger measurements are used to correct scanning measurements. |
