C of G on Origin

This could be achieved easily by using a macro feature... You would just insert a "relocation" feature, which would move the body to appropriate location. Worth a try!

-h-

With SW2003 and above, moving a solid body with a macro can be accomplished with the InsertMoveCopyBody2 command. You simply run this command with the negatives of the values you obtained for the center of gravity. Unless you do this repetitively, it is probably not worth your while to develop the macro. Just goto Tools, Mass Properties to get your CG values, then Insert, Features, Move/Copy, select the solid body, and plug in the negative CG values to move your origin to the CG. To move the solid body back, just suppress or delete the Body-Move/Copy feature.

Kent

An alternative would be putting the part in an assembly with just the part and mating the assembly origin to the CG sketch point. Then create your axis of rotation....

Blair

By using macro feature instead of regular macro, you could take the part body as an input parameter and multiply its translation matrix with inverse values from mass properties. As a result, the macro feature would act like move/copy body-feature, but it would automatically keep the body in a such position that the origin would be in GG.

-h-

Back to your original question,

If you go to View, Modify, and leave Rotate About Screen Center unchecked, won't SW rotate about the CG no matter where your model is located? That's how it appears to me. If your trying to center the CG on the screen, then create the point at the CG first and Zoom to Selection, then Z out to the desired magnification. Or am I missing something?

i dont think its COG. i think its center of overall size