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Filling in holes only when duplicating object


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Posted (edited) · Filling in holes only when duplicating object

I hate to only be posting when I think I found a bug, but here it is. I put a bunch of parts to print in Cura, and fortunately, I examined the layers before printing it, because on three objects out of eleven, it had filled very important screw holes. Puzzled, I remodelled my objects multiple times in Blender, reloaded them in Cura, to no avail. Earlier, I had printer multiple individual parts to test the fit, and it printed fine. So I tried loading just one model at a time, starting with one which hole had been mistakenly filled. When I spliced it again, suddenly, the hole was there. So I duplicated it, because I needed two, and then boom! Holes were gone again.

 

I think that there is really a bug this time, and it seems like when I duplicate objects with holes in them, Cura fills those holes.

 

Edit: I just tried duplicating the files instead of duplicating them in Cura, and adding them one by one. I add the first one: no problem. I add a second one: both objects end up with their holes plugged.

 

Cura-Duplicate.png

Cura-Duplicate-2.png

Edited by JonathanFV
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    Posted · Filling in holes only when duplicating object

    Thank you so much! And wow, this is crazy! Before exporting my STL file from Blender, my normals look fine! Then when I import my STL file again, the normals look all messed up. Guess I'll go ask if that's a Blender bug! Thanks a ton, again. Would you have an explanation as to why a single instance of the object sliced correctly, but two of them didn't? I'm just really curious.

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    Posted · Filling in holes only when duplicating object

    Sorry, I don't know much about models, I expect someone else could answer your question.

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    Posted · Filling in holes only when duplicating object

    That's very fair, thank you so much again for your help!

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