Joint issues with sub-assembly joints in larger assemblies

[anuhya.das]

I had a quick question about joints as well! In a sub-assembly, I have a slider joint which works perfectly, but in a larger assembly, the component jointed moves around freely. However, all the other joints work perfectly fine, including a different, identical slider joint. Do you have any idea on how to fix this joint so it works in the larger assembly?

I am having this issue with the motors specifically. 

[jhackney1972]

The Slide Joint on the indicated motor simply needed to be redefined in the Nacelle sub-assembly.  Your model is attached.  I would caution you to remember when you upload it to the Cloud into the same folder from where it came you will get a lot of duplicate components in the Data Panel.  For this reason I would create a new Folder to upload it to.

[TrippyLighting]

Care to explain why you did it this way ? 

[jhackney1972]

I am not sure what you want me to explain.  The one sub-assembly, in a sub-assembly of the top level, had a messed up Slider joint so I corrected it.  What else is there to say?

[TrippyLighting]

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@jhackney1972 wrote:

...had a messed up Slider joint so I corrected it...

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The Slider joint was not "messed up". It works perfectly when you Ground a part in the inserted assembly.

The Ground feature only works locally in a design file. If that design is inserted into a new design, the Ground feature has no effect in that design.

There are two ways to address that:

1. You ground a component of that inserted assembly , preferably the same one that was grounded in the inserted assembly. That is what you did if I interpreted your design correctly.

2. Use a joint (as-built rigid joint, rigid group joint, or regular joint) to join the top-level origin of the inserted component to "something" in the new design. In this case I would use a as-built joint including the top level origin in the new design. That, however, requires a certain discipline in creating external assemblies. That discipline requires a user to include every single origin in any assembly in some joint.

For me that strategy works 100% reliable in complex assemblies with thousand o components.

The underlying concept is simple: Manage ALL of your origins!

90%+ of those Fusion 360 design that exhibit joint problems, is because users don't follow that concept, or don't understand that grounding is local!