Exporting simplest of shapes results in unprintable STL

[nkloski]

Hi all.....I created a super simple shape....a cylinder 20mm tall, with a flat hole cut down 18mm inside.  Should be easily 3D printable, right?  Not so much!  The file does not slice properly, and looking at the STL export, I see tons of lines that originate ouside the model, going through the skin, and back outside...the slicer freaks out at that and makes the print unprintable.  Can someone explain how maybe to increase the STL export resolution for the number of facets on the cylinder, or just help me understand why this is happening?

The picture below is with the bottom removed to show internal geometry....

Thanks!

[SallyYang]

I've tried your file that removed bottom with latest Fusion 360(2.0.1082), the preview doesn't contains any lines out of model:

Consider the different result on my side, could you share the build version of Fusion 360 which could be found from:

If you are using older version, could you upgrade it to the latest, and let me know if you still can reproduce it.

[nkloski]

Thanks, Sally...that is thre version I am using.......If you look at the bottom of the exported STL, it is completely non-manifold, but with a shell that does nto connect, even though it should:

And If you do the manifold check in another program (Iher,e Blender) you get a ton of non-manifold places:

Any ideas?  This only shows up on the exported STL model.

Thanks!

[SallyYang · Accepted solution]

Thanks for the further information, I can recreate the issue now.

There is a local translator that could help you on exporting STL too, you can find a command "Save As STL" from the context menu of body in browser. The result is much better than export from dashboard. You can also set refinement option to get different level of quality.

[nkloski]

Yep, that works well, with a perfect STL generated.  Thanks!