topic Re: Scale and joints behaviour in Fusion Design, Validate & Document Forum

Scale and joints behaviour

0502880 — Sat, 21 May 2016 05:01:17 GMT

I just posted before a question about joints beahviour in scale: seems, that joints (revolute) doesn't follow the original object if you scale the whole assembly. Could them be updated automatically, or should they be placed again manually? Or some mistake in my workflow?

Here is a simple example: http://a360.co/1U0DDWF

Re: Scale and joints behaviour

jeff_strater — Sat, 21 May 2016 13:45:54 GMT

Yes, you are correct. This behavior does seem a bit strange. I suspect, though that it is the intended behavior. It's all a matter of history, and the fact that scale works on bodies. That joint is in the place where it was created at the time it was created. When you scale the bodies, this operation comes after the joint so the joint does not move. You can make this work as you expect it by simply reordering the joint to be after the scale:

Now, you are correct that this is surprising, given other behaviors. For instance, if you move the components (specifically the components, not the bodies in the components), the joint moves with it, even if the move happens after the joint. However, if you move bodies instead, you will see the same behavior.

Hope this helps clear up the mystery a bit.

Jeff

Re: Scale and joints behaviour

0502880 — Sat, 21 May 2016 15:13:33 GMT

Thank's Jeff, should remember to reorder history when same problem next time occurs.