Good .stl files import with serious errors

Good .stl files import with serious errors

Postby Fablicator » 02 Aug 2018, 11:04

I reloaded some files in 1.6.3 successfully sliced with 1.5.1 and noticed some parts were showing major mesh errors.

This part, a letter "F" was the simplest example I could find. When imported it asks about voids (which it has none) and then shows an inverted bottom surface.

If I transform the part (flip upside-down) the errors disappear.

File is here: https://www.dropbox.com/s/21a2rkbuv4ebg4p/F.STL?dl=0

Inverted F.png
Inverted F.png (5.56 KiB) Viewed 454 times
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Re: Good .stl files import with serious errors

Postby pjr » 02 Aug 2018, 15:14

That is interesting; neither Netfabb nor makeprintable.com show any errors in the file, but the "repaired" version opens without error.

I will add this to the list.

Thanks.

Peter
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Re: Good .stl files import with serious errors

Postby frozen.rabbit » 03 Aug 2018, 08:07

30 open edges, 25 overlapping vertices, not an error free model. Doesn't show errors in KS1.5

checked with 3dsMax
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Re: Good .stl files import with serious errors

Postby Fablicator » 03 Aug 2018, 09:35

frozen.rabbit wrote:30 open edges, 25 overlapping vertices, not an error free model. Doesn't show errors in KS1.5

checked with 3dsMax


Interesting.

It is a solidworks export fwiw, which usually are very reliable.
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Re: Good .stl files import with serious errors

Postby pjr » 03 Aug 2018, 18:25

Huh. Just checked with Slic3r PE - says there are 30 "edges fixed".

Peter
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Re: Good .stl files import with serious errors

Postby mhackney » 05 Aug 2018, 08:55

I use Rhino (CAD) for my design work for one very simple reason-it has excellent tools for creating and editing meshes. Here is what Rhino's mesh evaluation shows:
Screen Shot 2018-08-05 at 9.50.54 AM.png


This is NOT a well formed STL, it absolutely has naked edges. The fact that Netfabb and makeprintable.com don't show this is troublesome.

Interestingly, KISS shows exactly the same edge issues in its display - that's a good thing.

cheers,
Michael
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Re: Good .stl files import with serious errors

Postby Fablicator » 06 Aug 2018, 08:26

OK, so there are errors...

Why do those errors disappear when the mesh is transformed?

If an older version was tolerant to these errors, shouldn't the current version be at least as tolerant?
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Re: Good .stl files import with serious errors

Postby mhackney » 06 Aug 2018, 08:32

You'd have to ask the developer those questions.
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