To create a vision Round Slot, follow these steps:
For machines supporting DCC
motion, select DCC Mode 
if you want to create and measure round slots in DCC mode.
Select Auto
Round Slot 
from the Auto Feature toolbar. You can also
select the Insert | Feature | Auto | Round Slot
menu option. This opens the Auto Feature
(round slot) dialog box.
Vision Round Slot Auto Feature dialog box
With the Auto Feature dialog box open, select a round slot in one of two ways:
CAD Selection Method - From the CAD tab, click once near the edge of the round slot on the CAD surface to establish the round slot's location.
Target Selection Method - From the Vision tab, click three points on the first arc, and then three more points on the opposite ended arc. This establishes the round slot's location. Adjust the lighting and magnification as needed.
Click as close as possible to the CAD element to ensure PC-DMIS does not choose an incorrect element.
PC-DMIS Vision automatically places the nominal data for the round slot into the Auto Feature dialog box. The hit targets are automatically displayed for the round slot.
Adjust the nominal information in the Auto Feature dialog box to match the theoretical values of the round slot. Also, adjust the values of the Probe Toolbox as needed.
Click Test to test round slot measurement.
Click Create on the Auto Feature dialog box to add the round slot to the measurement routine.
Save the measurement routine for future execution. See "A Note on Executing a Vision Measurement Routine".