### Use Theos for CAD to Part Level Alignment

Introduced in v2010 MR2, this entry only does something in those cases where a level alignment exists without a successive rotation constraint. In this case PC-DMIS needs to decide the rotation direction of the secondary axis about the primary axis (the level axis). It will affect feature theoretical values following this type of alignment.

Entry Name: UseTheosForCADToPartLevelAlignment

Entry Type: Boolean value. The default value is False. False is the legacy value. Part programs prior to the creation of this registry setting behaved as if this setting were set to False.

When set to False, the rotation about the primary axis is determined by the measured values of the input features and the change in rotation of the CAD to PART transform about the level axis is approximately the same as the change in MACHINE to PART.

When set to True, the rotation of the CAD to PART transform is not dependent on the measured values of its input features; instead, it is based on the current CAD to PART transform.