Did Fusion Break?

Did Fusion Break?

Anonymous
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Message 1 of 3

Did Fusion Break?

Anonymous
Not applicable

So I'm working on my most complicated model to date, and doing really well for me. I started out well, but then modified the design midway through to accommodate suggestions my friend made. I define some user parameters to maintain scale if the model size changes, and I was gonna continue designing, but decided to change to see for myself. I changed from a solarsystem =250 to 225. Scale was maintained between the planets and solar system, but pluto's orbit shrank to be equivalent to Neptune's orbit. At solarsystem = 200, pluto's orbit was SMALLER than Neptune's orbit.

 

I have constantly rechecked the values, and don't see how this can be for any positive value when pluto's orbit = solarsystem * 1, and neptune's orbit = solarsystem * 0.9. Pluto's plane is at an angle, but that should not have any impact, as the orbits are concentric. What am I missing? Cause I keep checking and everything looks in order, but it doesn't look like it computes.

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jeff_strater
Community Manager
Community Manager

when you change solarsystem to 200, if you edit the "8" sketch, you will see that the solve fails.  It's easier to see if you roll back to just after "Pluto Sketch".  The error refers to two coincident constraints in the "8" sketch that are causing the failure:

Screen Shot 2021-06-15 at 7.54.07 PM.png

 

You can find the coincident by selecting in the error dialog.  I found this constraint:

Screen Shot 2021-06-15 at 7.56.24 PM.png

 

and, after deleting it, the sketches seem to update correctly.  There are some downstream failures that I did not investigate, though.

 

 

 


Jeff Strater
Engineering Director
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Anonymous
Not applicable

I feel like this was a fairly complex model to discern, I know I'd have a lot of trouble if I didn't design it, so thanks for taking a look.

 

I actually did find the 2 coincidents in question before I posted, and I noticed the downstream failures as well. I didn't investigate it too much, as more things started breaking, but what I really can't wrap my head around is how 2 coincidents that have - from what I can tell - absolutely nothing to do with the outer orbits - could have possibly affected things that have no relation to them. The only constraints in the 8 sketch are concentric for the circles, and all the orbits (circle diameters) are controlled by a user parameter and a coefficient. I'm just not seeing any sort of dependency. It seems like that element was randomly chosen as something that interferes when solarsystem value reduces. What am I missing?

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