Part Modeling > Engineering Features > Round > Rules for Creating a Full Round
  
Rules for Creating a Full Round
The following rules apply for Full rounds:
If you are using edge references, the edge references must share a common surface. The system converts two round pieces within a round set to create the Full round.
If you are using two surface references, you must select a third surface as the Driving Surface. This surface determines the location and sometimes the size of the round. The system replaces this common surface with a radius to create the surface-to-surface Full round.
You can create a Full round for solid or surface geometry.
You cannot create a Full round if:
More than two edge references border the same surface.
The round you are defining has a Conic cross section shape.
The round you are defining has been created using a Normal to Spine creation method.