DeslicebetaES

Process › Speed› Other layers speedouter_wall_speed

Outer wall speed

How fast the visible face of the part is printed. Lowering it improves the finish more than any other speed, and it adds the least to the print time.

How it works

The outer wall is the only line you see and touch. At high speed the print head shakes after every corner and leaves ripples (“ghosting”), the plastic goes down less evenly and the sheen changes. That's why it runs slower than the inner walls (300 mm/s) and the infill (270 mm/s).

Since the outer wall is a small share of everything that gets printed, slowing it down barely lengthens the print: it's the cheapest way to improve the finish.

When to change it

  • A figure to give as a gift, or a vase in silk or shiny filament: lower it to 100–150 mm/s.
  • A prototype for testing dimensions, where the finish doesn't matter: raise it to 250 mm/s. Above that, with PLA the nozzle can't melt plastic fast enough and the printer trims the speed on its own.

Typical values

ValueWhat for
100Best finish; silk and shiny filaments
200Defaultdefault
250Quick prototypes

Watch out for

  • The actual speed on each stretch is also capped by the filament's flow limit (21 mm³/s for PLA Basic) and by the minimum layer time needed for cooling: the printer may go slower than you ask.
  • On overhangs (parts that stick out into the air), “Slow down for overhang” takes over, not this speed.
  • So that speed changes don't show, the outer wall acceleration is also set separately.

Goes well with

Inner wallOuter wallSlow down for overhangSmall perimetersOuter wall
What Bambu Studio saysits help card, quoted

What Bambu Studio says

Speed of outer wall which is outermost and visible. It's used to be slower than inner wall speed to get better quality.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source

Bambu Lab wiki (index)
In your profile0.20mm Standard @BBL A1 · 200 mm/s · changes with the profile

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to200 mm/s

It changes with the Bambu Lab A1 factory profile:0.08mm Extra Fine200 mm/s0.08mm High Quality60 mm/s0.12mm Fine200 mm/s0.12mm High Quality60 mm/s0.16mm High Quality60 mm/s0.16mm Optimal200 mm/s0.20mm Standard200 mm/s0.20mm Strength60 mm/s0.24mm Draft200 mm/s0.28mm Extra Draft200 mm/sWhy does it change?

Helps with

Bands of shine on the wallsThe part breaks or the layers splitRipples or echoes next to corners

In other slicers

Orca Slicer
Outer wallSpeed › Other layers speed
PrusaSlicer
External perimetersSpeed › Speed for print moves
Cura
Outer Wall SpeedSpeed

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