Selecting Datum Features

To auto dimension a simple turned part such as the sample part, you only need to select one of the planar and cylindrical faces as the datum features. In more complex parts, a tertiary datum controls the rotation about the part axis.

In the PropertyManager, under Datum Selection:

  1. Click Primary Datum.
  2. Select the face of the plane.

  3. Click Secondary Datum.
  4. Select the face of the front outside diameter (Boss).