| Option | Description |
| DISABLED | No "find hole" operation is performed. |
| NOCENTER | This item acts as the CENTER item, except that the probe does not take the three hits to find the rough estimate of the hole's center. It merely begins measuring the circle using the existing parameters set in the specific Auto Feature dialog box. |
| SINGLE HIT | This setting tells the probe to take one single hit. If it hits the surface and does not find the hole, then it automatically switches to the "If the hole is never found" case (for circles and slots) or "If the hole is not found" case (for notches) described in the Find Hole specifics links. If the probe finds the hole, it uses the NOCENTER option to proceed. |
| CENTER | This item first causes the probe to move down to the "find hole" distance to make sure it does not encounter any material. It then moves to either the feature's depth or to the "check" distance to search inside the hole for a rough estimate of the hole's center (see the note below). 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 you select NOCENTER or SINGLE HIT, this is the default procedure that PC-DMIS follows if it finds the hole. |
| If the hole is found | PC-DMIS moves down to the "check" distance and proceeds to take three hits equally spaced around the hole to determine the general location of the hole. Following this general adjustment, PC-DMIS then measures the hole using the parameters that are defined on the feature's tab. This includes sample hits, and so on. This is the same as the CENTER item described above. |
| If the hole is not found | PC-DMIS backs away from the surface and starts a circular search pattern that is (feature radius – probe radius) out from the theoretical feature center. The search will try (2 * PI * feature radius/(feature radius – probe radius)) locations around the search circle. If the hole is still not found, the search radius increases by (feature radius – probe radius) and continues until the search radius is equal to the prehit distance. If the prehit is smaller than (feature radius – probe radius), only one search pattern is completed. |
| If the hole is never found | PC-DMIS moves the probe to a position of a prehit above the final point of the searching cycle and prompts you to do a "Read Position". (See "Read position Item".) |
| Adjustments along the surface normal | As PC-DMIS searches and finds a surface instead of the hole, it continually updates the search height based on the found surfaces. Once the hole is found, it updates the depth of measurement of the hole based on the last surface found. If the hole is found the first time, no adjustments are made. |
| Adjustments with RMEAS | If you supply an RMEAS feature (or features), PC-DMIS assumes that you want to use the feature(s) as the reference for both the search height and the depth of the hole measurement. Therefore, there is no adjustment along the surface normal other than the RMEAS adjustment. |
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