What we tested
| File | Bambu Studio said | Actual problem | Result |
|---|---|---|---|
| T-shaped part, 40 mm bar on a 10 mm post | It seems object t-cantilever.stl has floating cantilever. … | Clean solid; the arms overhang with nothing underneath | Sliced; the arms start in mid-air with supports off |
| Block exported with its boolean cutter | It seems object block-with-cutter.stl has floating cantilever. … | Cutter exported as a second solid (148 self-intersections, overlapping parts) | Cutter sliced as a solid cylinder through the block |
What is going on
Bambu Studio checks whether each object needs support before it generates any and warns when supports are off (source). The check (source) reports "floating cantilever" when a part reaches out more than 6 mm with nothing under it, and "floating regions" when a part starts in mid-air. The message table also has a "large overhangs" variant, but this version never produces it.
Repairing the mesh does not change the shape, so it does not clear this warning. It matters only when the overhang is leftover geometry, such as a cutter that was hidden in the modelling program but still exported.
What was actually wrong
How to fix it
- Slice with supports off and look at where the model overhangs; the warning names the object, not the spot.
- If the overhang is meant to be there, enable supports or re-orient the part and slice again.
- If it should not be there, check the file in FixSTL: an exported boolean cutter shows up as overlapping parts.
- Remove the leftover geometry in your modelling program and export again.
Source: Seen in our tests · Bambu Studio 02.08.02.61 on macOS