In SolidWorks 2013, center of mass is a selectable entity in drawings, and you can reference it to create dimensions. In a drawing, you can create reference dimensions between center of mass points and geometric entities, such as points and edges.
You can also add a center of mass point in assemblies. The position of the center of mass point updates when the model's center of mass changes. For example, the position of the center of mass point updates as you add, modify, delete, or suppress components or add or delete assembly features. The center of mass point can be useful when you are designing assemblies requiring balanced mass (for example, to avoid excessive vibration).
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