Non-manifold stl files I have found a number of projects that I would like to print from "thingiverse" but "Repetier Host" complains that some of the STL files are non-manifold and when I try to slice with Slic3r the preview has holes and gaps in it. I have tried repairing with Slic3r and various online services but often without success :-( Other people dont seem to have problems printing these files - so why do so many stls have this problem? Is it that Slic3r is more sensitive to this ? or that something like Cura could handle better ? What do other people do about these files ?? Any advice very welcome. Dave https://reprap.org/forum/read.php?263,881825,881825#msg-881825 Mon, 17 Aug 2026 22:49:34 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?263,881825,884978#msg-884978 Re: Non-manifold stl files https://reprap.org/forum/read.php?263,881825,884978#msg-884978
I just had to fix one that was not created in Sketchup. I modeled my whole printer in Sketchup. But alas, it won't print. But when I build it, it came together perfectly.]]> dustinoff Slic3r Sun, 11 Jul 2021 20:43:34 -0400 https://reprap.org/forum/read.php?263,881825,881855#msg-881855 Re: Non-manifold stl files https://reprap.org/forum/read.php?263,881825,881855#msg-881855
Two rules for happy 3D printing:

1) stay away from Thingiverse
2) stay away from Sketchup]]> the_digital_dentist Slic3r Tue, 23 Feb 2021 16:08:13 -0500 https://reprap.org/forum/read.php?263,881825,881850#msg-881850 Re: Non-manifold stl files https://reprap.org/forum/read.php?263,881825,881850#msg-881850
Mike]]> leadinglights Slic3r Tue, 23 Feb 2021 13:22:08 -0500 https://reprap.org/forum/read.php?263,881825,881825#msg-881825 Non-manifold stl files https://reprap.org/forum/read.php?263,881825,881825#msg-881825
I have tried repairing with Slic3r and various online services but often without success :-(

Other people dont seem to have problems printing these files - so why do so many stls have this problem?

Is it that Slic3r is more sensitive to this ? or that something like Cura could handle better ?

What do other people do about these files ??

Any advice very welcome.
Dave]]> softfoot Slic3r Mon, 22 Feb 2021 16:09:36 -0500