About the Center-Plane relationship

In this section: 4.5.29.1. Using the Center-Plane features on the command bar

(Home tab→Assemble→Center-Plane)

The Center Plane relationship is used to center a part between two selected elements in an assembly. The part being centered can be identified by a single element (called a single) or two elements (called a double). The part elements can be a planar face, edge, keypoint, axis, or reference plane. In operation, one (for a single) or two elements (for a double) on the placement part determine what is to be centered and two elements on the same part in the assembly or two different parts in the assembly determine what the placement part is to be centered between.

The following image shows how the midpoint on the roller (using a reference plane) is selected when forming a relationship based on a single element (A), or the surface elements on each end of the roller are identified when forming a relationship using a double element (B) on the placement part.

Next, the two elements that define what the placement part is to be centered between are identified.

The selected faces or planes do not have to be parallel to be valid, as shown next. Coplanar planes are also valid input.

---