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Any idea how to fix this "multiple shells" error?

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Any idea how to fix this "multiple shells" error? [message #49926] Sun, 17 June 2012 06:59 UTC Go to next message
avatar terrymisu  is currently offline terrymisu
Messages: 0
Registered: June 2012
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Junior Member

My STL file passed the automated check, but was rejected later by shapeways due to it having "multiple shells".

Attached is an image.

Any idea how to make this become one shell?

I'm using AutoDesk Inventor. I extruded the teeth from the cylinder and I'm new to this. I'm really not sure why it's not working as expected.


  • Attachment: 330690 -1.JPG
    (Size: 152.99KB, Downloaded 53 time(s))

Re: Any idea how to fix this "multiple shells" error? [message #49929 is a reply to message #49926 ] Sun, 17 June 2012 07:55 UTC Go to previous messageGo to next message
avatar stop4stuff  is currently offline stop4stuff
Messages: 3193
Registered: June 2010
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Shapie Expert
To me, it looks like the green teeth are not touchng the surface of the blue part, drop the teeth so that their bases intersect with the blue part, and then upload the .stl file to NetFabb Cloud Service - the service will 'repair' your model and boolean the teeth with the main part which you can then download from them. The cloud service will also tell you how many shells there are, one is a good number Smile

Once this is done and your model is one shell, you shouldn't have any issues with odering from Shapeways.

Re: Any idea how to fix this "multiple shells" error? [message #49930 is a reply to message #49926 ] Sun, 17 June 2012 07:57 UTC Go to previous message
avatar pfeiffer stylez  is currently offline pfeiffer stylez
Messages: 0
Registered: August 2011
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Junior Member

Does the connection between the cylinder and the teeths look kinda like that ?

  • Attachment: 3.png
    (Size: 23.28KB, Downloaded 147 time(s))

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