With the NOMINAL_WITH_DEVIATIONS mode, PC-DMIS compares the upper specification operator measured size against the upper limit of size. It also compares the lower specification operator measured size against the lower limit of size. Therefore, the Size command generates two measured values for a given feature of size:

With the TOLERANCE_CODE mode, the PC-DMIS report mimics NOMINAL_WITH_DEVIATIONS mode, except that it displays the tolerance code in the dimension header:

With the RANGE_OF_SIZES mode, PC-DMIS compares a maximum measured size against a minimum measured size and reports the difference. This mode requires a single measured value. The software compares that measured value against an upper tolerance.

When ASME Y14.5 is selected, two size characteristics are reported, the Unrelated Actual Mating Envelope (UAME) and Local Size.

The UAME is the minimum circumscribed size for external features (e.g. pin) and the maximum inscribed size for internal features (e.g. hole).

Local Size:

1. Circular Elements (default) reports the largest circumscribed circular element (internal feature/ hole) or smallest inscribed circular element (external feature/pin) amongst all local sizes.

2. Opposed Points is an option that reports the largest opposed points distance (internal feature/hole) and smallest opposed points distant (external feature/pin) amongst all local sizes.