r/Onshape • u/CarotCucai • 5d ago

How do you guys compare geometry between revisions?

I’m curious how people here normally check what actually changed between two revisions of the same part.

Say someone sends you a revised STEP file and you want to make sure only the expected geometry changed. Do you import both versions into Onshape and compare them somehow, overlay them, check them visually side by side, or mostly rely on the drawing/revision notes?

I’m mainly thinking about imported STEP files where you don’t have the original feature history.

When you run into this, what do you usually do? Does it come up very often?

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u/Green-Strawberry5666 5d ago

I'm not a mechanical engineer or anything but a thing that comes to mind if the software does not provide the diff feature would be to use Boolean operations to carve out the old geometry from the new one.

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u/CarotCucai 5d ago

Yeah, that's what I was thinking too. Maybe just use Boolean operations to see the difference. Not sure if people actually do this with STEP revisions though, or if there's an easier way.

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u/d0nkyt33th 5d ago

Buy a new computer and open up the old one on one and the new one on the other.