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Filament › Cooling› Part cooling fancooling_slowdown_logic

Cooling slowdown logic

What the printer slows down when a layer is too short: everything equally, or infill and inner walls first.

How it works

“Uniform cooling” (default) slows everything equally. “Consistent surface” slows infill and inner walls first and leaves the outer wall at its speed: a more even shine and fewer fine vertical marks on glossy filaments.

When to change it

  • Almost always: uniform cooling.
  • Glossy or silk filaments with bands or vertical marks: consistent surface.

Typical values

ValueWhat for
Uniform coolingDefaultdefault
Consistent surfaceGlossy filaments

Watch out for

  • With “Consistent surface” you also get “Perimeter transition distance”.
  • Only shown with Develop mode turned on in Preferences.

Goes well with

Don't slow down outer wallsPerimeter transition distance
What Bambu Studio saysits help card, quoted

What Bambu Studio says

Determines how the printer slows down when minimum layer time isn't reached. 'Uniform cooling' slows down all print features equally (current default behavior). 'Consistent surface' prioritizes slowing infill and internal perimeters first, preserving external perimeter speed for better surface finish on glossy filaments. This helps reduce VFA (Vertical Fine Artifacts) and maintains consistent surface shine.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source

This setting on the Bambu Lab wiki
In your profileBambu PLA Basic @BBL A1 · Uniform cooling

In Bambu Studio, the profile Bambu PLA Basic @BBL A1 sets it toUniform cooling

Helps with

Bands of shine on the walls

In other slicers

Orca Slicer
No clear equivalent.
PrusaSlicer
Cooling slowdown logicCooling › Enable
Cura
No clear equivalent.

Names taken from each program's code (Orca Slicer 2.4.2, PrusaSlicer 2.9.6, Cura 5.13.0). Credits