Nesting Feature Grabs Wrong Sketch Outline

[dave.bruford]

I'm just playing around with the new Nesting feature, and one of the parts in the Nest is using the wrong sketch detail as the "part".  Using the compare tool validates this, but the sketch seems fine in design, and there is another similar part with slots that came in ok.  Any ideas what the issue could be?

[dave.bruford · Accepted solution]

Never mind...I created a sketch-from-3D-geometry from the part face and the outline wasn't a closed loop - not sure why as it was originally extruded from a closed loop sketch?  Anyway, I closed the loop, re-extruded the part and used the "new" part and it works now.

[MattWynn]

Glad you found the issue.

LMK if you get any other parts that don't get the proper outer profile.

[dave.bruford]

Hi @MattWynn,

Once the nest is complete and exported as a .dxf, I'm bringing it back into Fusion and there are a lot of open end-points.  In fact, there is only one instance of one detail that is a closed loop (even though there are x8 copies of each in the nest).  Are there other export settings that I'm missing that would correct this?  Also, is there an option to export lines and arcs only vs splines?  Thanks! 

[phillip.doup]

Hello @dave.bruford ,

How did you export the nest to DXF? The workflow you used is key to helping understand where the problem may have started.

[dave.bruford]

Hi @phillip.doup,

I did a right mouse click on the "sheet" inside the nest result and did the export form there (see pic).

[MattWynn]

The nest sheet export to dxf does export only lines and arcs.  It works strictly with the nest results and currently does not use Fusion's standard DXF writer.

Why would you want to import that DXF back to Fusion?  There is nothing you can do with that dxf in Fusion that can't be done a better way than export/import.  What is the final result you are after?

[dave.bruford]

Hi @MattWynn,

I only brought it back into Fusion as we were having trouble with open lines in our laser software.  I brought it back into Fusion and saw the same thing, so I was assuming it was a bad .dxf to start.  Ideally, we would create the laser program inside of Fusion, but we're still working out the post processor edits.  Thanks.

[MattWynn]

Yes, right. 

What kind of laser are you running?  LMK if you continue to have trouble with the post.

[feman43]

I am having a similar trouble and cannot figure it out. I have gone back and reaerated the part, have made a new part using the original profile and have made a new sketch profile and the nesting routing is doing the same thing. What is occurring is that the function is connecting to a slot cut in the part and using that for its base. I also tried assigning a sketch to the part and that doesn't work either. I am a novice and this is my first effort at nesting. I have step by step followed along with the tutorial and I cannot sort this out. I think I have tried so many "fixes" that weren't that now I don't even get my nested panels. I'm afraid I broke it....

Mark

[javiar]

@feman43 ,

You may try projecting the profile onto a sketch and see if it returns a closed loop or has some disconnected endpoints. It is possible that the shape extraction is returning an open contour. Are you able to share the model?

Ravi J

[feman43]

I tried that and it didn't fix the issue. The problem is some errant geometry is coming from some place in the construction line. Most likely it comes in from the way I created the tabs on the part. I managed to get around the nesting trouble by using t he arrange function. I have managed to create a workable laser sheet. I'll be more diligent on the next project to keep the construction cleaner. I had deleted some projections along the way which lost the control features that I fixed by converting to a Direct Model feature.