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14 Posts

rotary joint without features

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2 weeks ago

Hi,

I've generated several components, one in each file. Every component has at least one 3DconstructionPoint on a ConstructionAxis for the later joint definition.

 

The joints for the assembly shall be rotary joints (aligning one axis of each component coaxially with the corresponding axis of another component) and the 2 point on those axis shall conincide.

 

In Inventor this task is very straightforward (mate both axis and both points). I'm struggling to get the alignment done in the UI as well as in the API.

 

I did extrude a cylinder along the axis and centered at the point in each part and the alignment work perfetcly in the UI using those bodys. But since the components are more conceptual for now, I don't want any bodys to be involved in the joint definitions. Is there a good, deep tutorial for generating joints, jointgeometries, jointorigins and how they interact. It's a very complex field in 3D modeling and the documentation on it seems to be unsufficient. 

 

Big Thanks,

Stefan

Autodesk Support
1256 Posts
352 Kudos
368 Solutions

Re: rotary joint without features

Friday in reply to: stefan

Joints in Fusion are somewhat limiting, especially with what you can select as geometry input.  It seems you can't use a construction axis and it requires real geometry.  Let me double-check with the team responsible for joints to see if there's some other way to do this that I'm not aware of.


Brian Ekins
Inventor and Fusion 360 API Expert
Mod the Machine blog
Participant
14 Posts

Re: rotary joint without features

yesterday in reply to: ekinsb

I agree, the joint concept is unusual - I assume it's for good reasons.

 

But - there is no need for a geometry feature as joint reference. A sketch line does work as a joint reference. No need for 'fake geometries' (that are only used for joint definitions).

 

I use lines for rotary joint definitions and align them on their midpoints.

 

Thanks,

Stefan

 

 

Autodesk Support
1256 Posts
352 Kudos
368 Solutions

Re: rotary joint without features

yesterday in reply to: stefan

That's a good suggestion about using sketch geometry, but it seems construction geometry should also be supported.  Hopefully in the future.


Brian Ekins
Inventor and Fusion 360 API Expert
Mod the Machine blog