Slicer prints floating circle instead of doing a bridge

[VCoves]

Description of the bug

Slicer prints floating circle instead of doing a bridge. https://github.com/user-attachments/assets/d59e71f4-be80-4cdc-8159-06fcc4dc1f32

Project file & How to reproduce

cylinder.3mf.zip

Checklist of files included above

• [X] Project file
• [X] Screenshot

Version of PrusaSlicer

Version 2.8.0+MacOS-arm64

Operating system

macOS 14.6.1 (23G93)

Printer model

sovol sv06 plus

[fe60]

How do you expect this to be printed without support?

In such cases I make the geometry of my models printable. I change from the larger diameter to the lower one, by adding two intermediate layers. First the larger lower hole is reduced to a rectangle (not a real one, because of the round short edges) [1] and with the next layer the hole becomes square-cut [2]. After these two helper layers the smaller hole can be printed.

[1] height = layer height, width = diameter of upper hole, length = diameter of lower hole [2] height = layer height, width/length = diameter of upper hole

Screenshots of sliced example

First/Large Inner Diameter

First Helper Layer

Second Helper Layer

Second/Small Inner Diameter