Joints and Joint Origins
Joint Origins are one sided Joints selections. They also have two wonderful properties. They have the ability to be re-oriented making them valuable when you want to change the connection plane of a Joint. The second properties is that they can be added to saved components and be used over and over when the component is used withing an assembly. They can carry added information, such as offset, angle, etc. in their properties. Below I demonstrate the property of re-orienting a Joint Origin.
John Hackney, Retired
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You said, "You can't do it with a Joint straight up"
No Joint Origin. (I have acknowledged the reorient function cases.)
Using primitives makes it a little more difficult / restrictive but it is a primitive after all is said and done, but not impossible.
@engineer1984 - it's actually a very good question. The truth, in an "under the hood" sense is: All Joints in Fusion are built with Joint Origins. It's just that some are not explicitly shown (not in the browser, nor in the timeline). Further, if you go back in time, at one time in Fusion's history, you had to create Joint Origins to create a Joint. People grumbled about this workflow, as it required 3 distinct steps: 2 Joint Origins + 1 Joint, so we added the "implicit Joint Origin" workflow to the Joint command.
So, whether this is bad practice or not is not objectively answerable. If you like the flexibility of creating your own Joint Origins, in my opinion, that is a perfectly valid workflow. Explicit Joint Origins are way more flexible than Implicit Joint Origins (although we relatively recently made them more flexible with the addition of "between two faces", and "two edge intersection" options in the Joint command. You will have more items in your timeline, and in your browser, but at the internal level, those objects and features still exist, they are just hidden. So, there is no effect on performance or stability. If anything, Explicit Joint Origins, if they do fail, are more easily repaired.
Hope this helps.
Jeff Strater
Engineering Director
As others have mentioned, explicit joint origins are perfectly fine.
They can be very helpful when the geometry does not offer any convenient snap points and are particularly helpful when you re-use component/designs.
This thread reminded me to report two, or three bugs related to joint origins, but none of them are deal breakers. They just diminish the joy of working with explicit joint origins.
Something not many users are aware of is that you can drag-snap joint origins to create a joint, which is indeed very useful.
Hi,
Maybe someone can show me where to find the required rotation axis when editing the joint.
günther
@engineer1984 wrote:
Speaking off bugs... when I have a component selected (component selected is solid.. rest of drawing is see thru) and I select Joint and then cancel Joint.. all the components become / remain visible.
Not a biggie, but to fix it I have to select a different component and then re-select the component to get back to the correct view (one component is solid and the others are see thru).
Again, not a biggie in the grand scheme of things, but definitely seems like a bug to me.
@engineer1984 I've noticed this behavior as well.
@jeff_strater @Phil.E can you log these bugs please ?
