Fusion360 Exporting 1 body as multiple bodies

[Blumbejt]

Hi,

I am having a problem that I can not figure out for the life of me. I have modeled something out in fusion (pretty simple), but when I go to export as a .stl it exports fine, but all of my 3D printing slicers (Simplify3D and Cura) see it as two objects and won't print it as one. This is really frustrating as when I print it one of the bolt connectors is basically a break away piece. Any help on this would be greatly appreciated. I have also tried taking the piece into netfabb and doing extended repairs and nothing.

Thanks in advance for your help!

[jeff_strater]

can you share the design here?  We can take a quick look.  What happens if you re-import the STL back into Fusion?  Does it come in as one mesh, or 3?

[Blumbejt]

Here is the download link https://a360.co/3dlSOt. It seems like when importing the stl back into fusion it is two separate pieces as well. Kinda hard to tell though.

[jeff_strater]

that link does not seem to work for me.  I wonder if something got lost in the copy/paste of the link.

[Blumbejt]

oops seem like it did see blow

https://a360.co/3dlSOtv

[jeff_strater]

thanks.  I can access it now.  While waiting for the download, I can tell even in Fusion Team that there are multiple bodies here.  Each body will produce a separate STL.

[Blumbejt]

Yeah I understand that. Right now I am looking at body 42 where it all seems to be one thing.

[jeff_strater]

if I turn off all bodies except 42, and export that body, it seems to come into Cura as a single body:

in Cura:

though I admit that I am not familiar with Cura to know if there is something wrong there.  Attached the STL I get

[Blumbejt]

Hi Jeff,

I downloaded your STL and tried it myself, and same problem see pics attached. In solid view it does not show it, but in layer view which is what it tells the printer to do the problem still persists.

[jeff_strater]

I suspect that this is a geometry problem with your design.   This body has a few areas that look questionable, and I believe this is causing Cura to do weird things.  I did not spend any time trying to find the source of these, but here are a couple:

I was able to fix one of them using Delete, which heals this area of the body.  I would recommend that you clean up these geometry effects, and see if that helps

[Blumbejt]

Ok Thanks! I tried doing this with the problem area, but if I hit delete it takes away the whole piece. I extrudered it all from one sketch do you know why it is doing this? 

[jeff_strater · Accepted solution]

I looked at this area.  The problem is an inaccurate sketch.  If I find and edit the Extrude that made this geometry, you can see the problem from the Extrude selection preview.  Red lines in the profile selection show areas where there are open edges in the profile:

this red edge is an indication of the problem.  Once I found and edited that sketch, I could see that there were 4 separate lines in this area, which is never a good idea.  Zooming in, you can see that there is a very narrow gap, and that is the source of your geometry problem.  In the screencast below, I show how to fix the extrude, which should close this narrow gap.  But, this is not the correct way to fix this - you probably should go into that sketch and fix up all that sloppy geometry to prevent that gap from existing in the first place.  

[Blumbejt]

All fixed thank you for your help