topic Re: How do you rotate an assembly? in Inventor Forum

How do you rotate an assembly?

Bajicoy — Sat, 20 Jan 2018 15:59:54 GMT

After I jointed parts together to build the tower of my project, one of the parts caused the tower to angle like the leaning tower of pisa. It's really disorientating and whenever I try to rotate the assembly it just snaps back into its crooked position. I don't know how to make the assembly parallel to my orthographic view because if I try to assemble any more parts to the machine, they get disorientated as well.

Thanks for the help!

Re: How do you rotate an assembly?

TheCADWhisperer — Sat, 20 Jan 2018 16:04:46 GMT

I do not see any Grounded parts in your browser tree,

but add Mate-Flush constraints between the XY, XZ and YZ assembly Origin planes and logical reference part and all will be resolved.

Re: How do you rotate an assembly?

Bajicoy — Sat, 20 Jan 2018 17:06:26 GMT

Thanks! I'll be sure to use grounded more often, surprised it didn't make the cut to be on the top ribbon XD

Re: How do you rotate an assembly?

doug.johnston — Mon, 22 Jan 2018 09:38:25 GMT

Some advise I've found about grounding models.

I used to ground everything when I put together an assembly in the past ... but when you need to change a part or change the model, grounding can cause a lot of issues. I always try and use constraints whenever I can; even if it causes more work. Your model will be more "user friendly" and easier to change in the future.

I always ground my first part of an assembly (or constrain) it to the main model origins. Then constrain everything to each other building from the bottom up using the main origin planes / axis.

Also, I always name my constraints when I create them, so making changes are easier to find.

Just my 2 cents ....

Re: How do you rotate an assembly?

Anonymous — Mon, 22 Jan 2018 18:50:11 GMT

I know this has already been marked as solved but One thing I typically set is the "first component grounded" option in the Application Options menu:

This eliminates the process of having to do all the constraints to the origin. Just as long as your parts are created in the correct orientation, this works like a charm. Set it and forget it. Once that's done, constrain all your other parts/subassemblies as required. When files get updated, chances are they'll react in a manner you expect them to.