This entry specifies the default option to use when the Find Hole check box is selected in the Auto Feature dialog box.
Entry Name: DccFindHoleType
Entry Type: Whole number that specifies CENTER (0), NOCENTER (1), or SINGLE HIT (2). The default value is 0.
When the Find Hole box is selected, PC-DMIS moves to a position of a prehit distance above the theoretical center of the feature, then drives normal to the feature surface vector searching for the hole at touch speed. The search continues until either the surface is touched (indicating that the hole is not there) or until the check distance is reached (indicating that the hole is present).
0 - CENTER – This value causes the probe to move down to the "check distance" depth for the hole and search inside the hole for a rough estimate of the hole's center. The probe does this by taking three hits equally spaced around the hole. Once the probe has the hole's general location, it then proceeds to measure the hole using the parameters set in the specific Auto Feature dialog box. Unless NOCENTER or SINGLE HIT is selected, this is the default procedure that PC-DMIS follows if the hole is found.
1 - NOCENTER – This value causes the probe to act as the CENTER value would, except that the probe doesn't take the three hits to find the rough estimate of the hole's center. It merely begins measuring the circle using existing parameters set in the specific Auto feature dialog box.
2 - SINGLE HIT – This value tells the probe to take one single hit. If it hits the surface and doesn't find the hole, then it automatically switches to the "If the hole is not found" case described in the "Working with Contact Find Hole Properties" topic of the PC-DMIS CMM documentation. If the probe finds the hole, it proceeds with the CENTER option.