| Non-manifold after stacking several model parts. [message #8540] Thu, 24 December 2009 17:56 UTC |
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Hello Shapers!
I'm having problems with a model I made.
The problem is as followed: The model is perfectly printable aslong as the parts are not stacked together. BUT, whenever I stack the parts together it gives me the non-manifold error.
This image might show what I mean. The 5 parts on the right are stacked on top of eachother to form the 2 objects on the left.
The 5 parts exported seperatly work perfectly, the 2 models on the right give me the non-manifold errors.
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Does anybody know what causes this? (does the server try to boolean the object together before sending them too the printer?) And is there a way of fixing this?
Thank you for your help 
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| Re: Non-manifold after stacking several model parts. [message #8541 is a reply to message #8540 ] Thu, 24 December 2009 19:09 UTC |
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I am very new to this, so I may be wrong. But I have noticed that when I try to stack parts like this in Sketchup I get the same problem. I think it is because where the parts touch it shows as a surface within the part. If you can delete that surface without affecting the rest of the model it should clear up the problem I think.
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| Re: Non-manifold after stacking several model parts. [message #8542 is a reply to message #8541 ] Thu, 24 December 2009 19:43 UTC |
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Ye that's what i was thinking off aswell, problem is that i need these parts to intersect because it has to be 1 piece. If I these parts don't intersect it might cause fragile seams on the places where 2 objects come together.
But it's worth a shot, maybe a tiny offset is enough to fix this problem. Thanks for the help 
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| Re: Non-manifold after stacking several model parts. [message #8603 is a reply to message #8540 ] Tue, 29 December 2009 16:14 UTC |
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Try deliberately overlapping your objects.
If you have objects that you are aligning exactly, then you may get vertices with the same x,y,z position. If the export or import merges any of these identical vertices, then your resulting mesh will be non-manifold.
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| Re: Non-manifold after stacking several model parts. [message #8610 is a reply to message #8540 ] Wed, 30 December 2009 00:13 UTC |
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Hmm sounds like something that might work, the problem is that that's part of the design. And I can't really change the design.
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| Re: Non-manifold after stacking several model parts. [message #8716 is a reply to message #8540 ] Mon, 04 January 2010 09:02 UTC |
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Wolfdagon is right: when you're joining these objects you are probably left with internal and coincident faces, and these are detected as being nonmanifold. You'll have to clean up your mesh, I'm afraid..
Cheers,
Bart
Community Manager Europe | Shapeways
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