Center of Mass Point in Assemblies

You can add a Center of Mass (COM) point to an assembly.

The position of the COM point updates when the model's center of mass changes. For example, the position of the COM point updates as you add, modify, delete, or suppress components or add or delete assembly features. The COM point can be useful when you are designing assemblies requiring balanced mass (for example, to avoid excessive vibration).

You can mate to the COM points of an assembly’s components in distance, coincident, and concentric mates. You cannot mate to the COM point of the assembly itself.

Click Center of Mass (Reference Geometry toolbar) or Insert > Reference Geometry > Center of Mass.

In the graphics area, appears at the center of mass of the model. In the FeatureManager design tree, Center of Mass appears just below Origin .

If you add COM points in component files, the points appear in the parent assembly:

	Subassembly
	Part

For example, in this assembly, indicates the center of mass of the assembly, and indicates the centers of mass of three component parts:

For more information about COM points, see Point at the Center of Mass and Reference Center of Mass in Drawings.