topic Re: Revolute join warning/issues in Fusion Design, Validate & Document Forum

Revolute join warning/issues

saranga2000 — Sun, 15 Aug 2021 06:59:48 GMT

Hi, Am new to Fusion 360, DIY hobbyist, first post on the forum. Am trying to create a book shelf, that can also act like a stepped shelf. I am able to add multiple revolute joins between the frame bars and shelves, but at a certain point, when I add another join it warns about conflicts and the previously successfully added revolute joints also show a "distance conflict due to join type" .

What might be the issue? Have attached screenshots before and after adding the last revolute joint, as also a screen cast, and the exported archive file.

Thanks In Advance!

Re: Revolute join warning/issues

davebYYPCU — Sun, 15 Aug 2021 07:57:16 GMT

Nothing is grounded, and too many capture positions, but

When revolve joints misbehave, you find the misalignment.

Your top front revolve will not work as currently set up, because the hole spacing in the shelf, (14 in)

does not match the hole spacing in the rigid frame (13.994 in), and must be 14 inch in Fusion.

Might help....

Re: Revolute join warning/issues

daniel_lyall — Sun, 15 Aug 2021 08:32:12 GMT

@davebYYPCU DEFINTLY

@saranga2000 Delete all the capture positions and never use them again or I kill you(joke), then do an as-built joint between frameBar 1 and the world origin, then on each shelf do a joint from the shelf to the frame bar 1 then an as-built joint between each shelf and framebar 3.

In a way, you had it backwards you lock one thing down so it does not move the very first component do an asbuilt joint to the word origin so this part is locked in places that would be frame bar 1.

You have to plan it out so you have something locked in places then everything is built from that so for you it is asbuilt joint to the world origin then joint the shelves to framebar1 then asbuilt joint from the shelf to frame bar 3 the other frame bars leave them alone.

Re: Revolute join warning/issues

davebYYPCU — Sun, 15 Aug 2021 10:05:46 GMT

Whilst not a factor here, AS Built is not a good idea if parts are changing due to parameters.

Shortened the timeline a bit.

Re: Revolute join warning/issues

saranga2000 — Sun, 15 Aug 2021 15:45:30 GMT

That worked, learnt from your timeline, thanks much!

Re: Revolute join warning/issues

saranga2000 — Sun, 15 Aug 2021 15:47:10 GMT

I guess I have not understood what capture position does, and more. Thanks for the details on how to go about assembling.

Re: Revolute join warning/issues

saranga2000 — Sun, 15 Aug 2021 15:48:43 GMT

I had looked up a few youtube videos for joins, any others you might suggest? Especially any that call out the basic thumb rules of assembling, joints? Thanks!

Re: Revolute join warning/issues

daniel_lyall — Sun, 15 Aug 2021 21:20:25 GMT

The other way is to join the origins using a joint.

Every action added to the timeline is an action that gets recalculated so if there is a move and capture position that's two actions if you just insert the part or build in places and use a joint to position it the joint is one action that is forever editable by just editing it without adding move actions.

Just taking the capture positions out and deleting the joints the parts go back to where they started from and you can just do a joint from where they are to what they attach to so it is fewer actions that are simple to edit.

It is very rare that I move stuff with the move command or use capture postion nowadays I find stuff is more stable and works better by using a joint to move stuff and not doing moves or capture positions.

https://help.autodesk.com/view/fusion360/ENU/?guid=ASM-JOINTS

Re: Revolute join warning/issues

davebYYPCU — Sun, 15 Aug 2021 21:27:28 GMT

There are some good references spread far and wide in YouTube and because Fusion is still developing, some that steered me, are long out of date, and I was taught in here, some my own efficiency methods over time, incorporating new features as they arrive.

Example, is the new single wall Extrude, saved so much sketching, see my first sketch.

5 lines and you have 2 components to work on.

A few pointers....

Rule 1 at the top of the Forum page, is well understood, and used as a starting point works for most projects.

Symmetry of the finished design and it’s components, is important, my Origin in the centre of your shelf, makes it easy to avoid mirrors using circular pattern. (Apparently important for BOM)

Capture Position is handy for temporary visibility, after making a Joint, Delete the Capture, it’s not needed and not going to break anything. Revert is a good thing, when testing.

There is no right or wrong, some things are better....

Might help....