topic Re: Workplanes in sub not attached to sub in Fusion Design, Validate & Document Forum

Workplanes in sub not attached to sub

Anonymous — Fri, 27 May 2016 17:51:30 GMT

Hey guys,

Why are the workplanes and axes that are in a sub not moving with the sub when I constraint ti using joints (or drag it). All components in the sub are a rigid group. I would think the workplanes would follow the geometry they were created off. In the screenshot Plane 1,2 and Axis 1 should all align witht he main axis of rotation of the robot. In the second screen shot you can see they do.

http://screencast.com/t/gixMqaFebJkc

http://screencast.com/t/9g80oP3gL69Y

I'll be honest, after using Inventor for 13+ years, Fusion is VERY non-intuative...

-Sean

Re: Workplanes in sub not attached to sub

innovatenate — Tue, 31 May 2016 17:12:31 GMT

There is a known issue with Rigid Group command at the moment that may be the root cause of the issue you are seeing. Check out the below forum thread for more discussion about this command.

http://forums.autodesk.com/t5/design-validate-document/ground-in-fusion-360-will-not-work/m-p/6053788#M46653

I suspect you may just need to manually select the child components in the Rigid Group command.

I hope that helps!

Thanks,

Re: Workplanes in sub not attached to sub

Anonymous — Thu, 02 Jun 2016 12:34:27 GMT

Yeah there is definelty some major bugs in both the rigid group and the gorunding commands. Honestly it makes the assembly environemnt of Fusion pretty frustrarting. And this is coming from a 15 year veteran of Inventor.

Considering this has been known since before Feburary I'm really surprised to see it has not yet been addressed.

-Sean Dotson, PE

Re: Workplanes in sub not attached to sub

jeff_strater — Thu, 02 Jun 2016 16:31:14 GMT

For some reason, your screenshots are being blocked by our internal security filters, so I can't see what the problem is. You should be able to insert images directly into a post here. Better would be a screencast video (this screencast tool from Autodesk: screencast integrates really well into Fusion), or sharing the model itself.

However, based on your description, I have a theory that it has nothing to do with the rigid contstraint, but instead in the way that Fusion handles assemblies. And yes, it is very different from Inventor, so it will take some getting used to.

First, there are no differences between an assembly and a part. Everything is a "component". A component can have its own geometry (bodies, sketches, work geometry), and it can also have child components. So, you can have a kind of hybrid component: partly assembly, partly part. Second, when you make constraints (joints) to components that are in a component assembly, those joints are only to the leaf-level component that was selected. In Fusion, to use Inventor terminology, all assemblies are flexible.

So, if, in your sub assembly, if the work planes/axes/points are owned by the top level of the subassembly, but you make a joint to a body in a sub-component of that subassembly, then only that component will move.

So, if you can share your model or a screencast, I can shed more light.

Jeff