preliminary Setup:

  1. Start with two nominal surfaces that are expected to mate together in some fashion.

  2. Declare one of these surfaces to be the primary and define a Points to Surface Face Relationship to which points can be added to characterize the as-built surface relative to the nominal CAD surface. Use this relationship for a best-fit if desired and en- able auto-vectors.

  3. Declare the second of the two mating surfaces to be the secondary by defining a second points to surface relationship to characterize the second as-built surface. The collected points need to correspond to those points collected for the primary surface. Use this relationship for a best-fit if desired (if using a second instrument station) and enable auto-vectors.