I’m a newbie to 3D printing. Downloaded an Stl file, am getting nonmanifold edges. Only PC bambu studio can fix automatically. Naturally I have a mac. Can anyone explain what I need to fix? I know I can create a PC on the mac, want to understand manifold edges.
Non-manifold geometry is defined as any edge shared by more than two faces. This can occur when a face or edge is extruded but not moved, which results in two identical edges directly on top of one another.
So basically you have overlapping edges that cannot be printed.
Thank you. I would never have guessed that meaning.
After importing a car model exported from Archicad in STL file format, I encountered the same error message. I have a partial understanding of the issue, but could you kindly explain the possible reasons behind the absence of layers in the preview model?
can be fixed by searching “free online stl repair tool” online. formware has one, but I cant include the link on this forum.
the formware tool is awesome! thnx
Yes, the FormWare tool works well. Now that many have found it, I often have to wait hours for my turn in the queue.
Does it take .3mf files, not sure if that is the issue I am having or just an error when I upload a file
I find the same thing. I upload my file and then it sits, and I wait, but then it times out and never gets fixed.
In my case, it was solved by activating supports.
While there isa lot of online tools to fix model geometry issues or to turn them into solids, there is also the option to just abuse a slicer that does even if your printer does not support it.
Same for modelling softwares, quite a few are able to fix models already upon import, simply check or activate the a fix manually and then save the repaired model.
I am not a Mac user but I know from forum visits that quite a few Mac users deal with bad models and fix them.
If Bambu does not fix your models check what else can that works on a Mac.
No need to learn how the entire software works if all you need is the build in repair options 
I have an older Windows PC, so I can share .stl files with it and fix them in Bambu Studio there. That’s the only thing I use if for, Mac marginalization. I know there is a lot of information that I don’t have about Windows, but there are a lot of things that don’t make any sense on either platform. More things make sense to me on a Mac, so I guess I’ll have to resort to these sorts of workarounds when my Mac lacks a sufficient solution.
I had the same issue. Nothing fixed the model. Nothing online, nor Babu studio when you click on “fix model”.
The easy way to do it is download “mesh mixer”.
Import your model, and click “make solid”.
That solved my issue after hours of messing around.
Does anyone know what happens if you try to print despite this issue?
I guess this a try and had no issue, but, perhaps, it depends on the model.
My problem with this is that my printer was working fine, then I suddenly get this error on everything. If I try to print the item, all I get is garbage. The problem seems to be with Bambu Studio, as there is no way possible that every one of my .stl files have “non uniform edges”. (This error message is coming up even on projects that have printed properly before.) My solution at this time is wiping Bambu Studio completely and reinstalling it. Don’t know what else to do.
right click it, export it as a stl and that might work
A bit late, but since this thread still gets found: the underlying problem is edges shared by more than two triangles (internal fins) or by only one (open holes). Blender’s 3D-Print add-on will show you exactly where they are if you want to understand the geometry rather than just fix it.
If you just want it fixed and you’re on a Mac, I built a free web tool for this, so it runs in the browser on anything: it shows the defect report first (non-manifold edges, holes, flipped normals, duplicates) with before/after dimensions, then gives you a watertight STL. There’s a check-only mode too. Full disclosure: it’s my own tool: STL Checker & Repair Online — Defect Report + Watertight Fix | Converter Flow
If you have questions, I will be happy to address them.
As a Mac user, I was interested to see your post and try your converter.
I uploaded a 1.4 mb file that I knew had issues. After about 7 minutes processing, it indicated success, and then returned a 39 byte file, with no geometry.
I tried to contact you via the contact page on your website, but there is some issue with your Captcha tool, as it indicates “Success!” verifying I am human, but then fails to send the message, indicating that “Captcha verification failed”.
Let me know if / when you fix the Captcha issue, and if you’d like to see the files, as well as the transcript from the conversion session.
Hopefully you can get this all working, as I am sure many of us would appreciate and use it.
Thanks for the effort so far!
The contact form had a genuine error; it was not sending the captcha token to the server correctly. Fixed now, and I added file attachments too, so you can send the file directly (25Mb limit).
On the conversion: a “success” that returns a 39 byte empty file is worse than an honest error. It now fails clearly instead of handing back an empty mesh. I’d still like your file to see what happened over those 7 minutes. If possible please send it through the contact form (or the session ID if you have it) and I’ll dig in.
Thanks again.