5.2. Resolution experiment
As the probing system has both trigger and micrometer functions, so its resolution in measurement range is a most important, parameter that determines its probing precision. At the beginning of this experiment the piezoelectric stage is controlled to move to the spherical probing head after trigger point, and then to scan at a preset step, the minimum scanning step that the probing system indication can accurately determine its resolution. The results are shown in Fig. 11.