Filament › Cooling› Part cooling fanoverhang_fan_speed
Fan speed for overhangs
How fast the fan runs when the nozzle prints a bridge or a wall that overhangs a lot.
How it works
What's printed in the air has to harden quickly so it doesn't sag. On those sections, the fan goes up to this speed even if the rest of the layer gets less air.
When to change it
- PLA: 100%, as it comes.
- ABS or ASA cracking at the overhangs: lower it.
Typical values
| Value | What for |
|---|---|
| 100% | PLA Basicdefault |
Watch out for
- Only used with “Force cooling for overhang and bridge” on.
Goes well with
What Bambu Studio saysits help card, quoted
What Bambu Studio says
Force part cooling fan to be at this speed when printing bridge or overhang wall which has large overhang degree. Forcing cooling for overhang and bridge can get better quality for these part
Bambu Studio tooltip for this setting · AGPL-3.0
Read more at the official source
In your profileBambu PLA Basic @BBL A1 · 100 %
In Bambu Studio, the profile Bambu PLA Basic @BBL A1 sets it to100 %
Helps with
In other slicers
- Orca Slicer
- Overhangs and external bridges fan speedCooling › Part cooling fanIn Orca internal bridges have their own setting: internal_bridge_fan_speed.
- PrusaSlicer
- Bridges fan speedCooling › Fan settings
- Cura
- Bridge Fan SpeedExperimentalOnly for bridges, not overhangs, and only with bridge_settings_enabled.
Names taken from each program's code (Orca Slicer 2.4.2, PrusaSlicer 2.9.6, Cura 5.13.0). Credits