Missing Chamfers in STEP file

[SekA1448]

Description of the bug

Prusa slicer does not recognise all chamfers in STEP file. Object has warning OPEN FACES detected. Chamfers are present in 3DConnection (Spacemouse) viewer 3D file exported from FUSION 360 Exported STL file is OK in that regard

Best regards Aleksander

Project file & How to reproduce

Checklist of files included above

• [ ] Project file
• [X] Screenshot

Version of PrusaSlicer

Prusa slicer 2.7.1

Operating system

Windows 11

Printer model

Voron 2.4 350

[sarusani]

Your model has errors (hence the "warning OPEN FACES"), you need to repair it, after that the chamfers should be recognized correctly.

Click on the explanation mark on the object list (on the right). Or right-click the model and select "Fix by windows repair algorithm".

[neophyl]

This looks like the same problem as this one https://github.com/prusa3d/PrusaSlicer/issues/12033
Just because a model can be rendered visually does not mean it can be correctly sliced.

[clfaye]

I can confirm that Prusa Slicer does not always treat chamfers correctly. Like the OP, I have a solid model from Fusion 360 that is water tight. No errors reported when I use the STL file. If I use the STEP file many (but not all - even though they are identical) of the chamfers are reported as open edges. The STEP file opens watertight with the Autodesk online STEP viewer, the Open Design Alliance STEP viewer, and the NIST STEP File Analyzer and Viewer. main base project file.zip

[kubispe1]

There is a closed duplicate issue: #12271

[kubispe1]

SPE-2257