Outer wall acceleration
How hard the print head speeds up and brakes on the outer wall, the face you see. It's set lower than the normal acceleration so corners don't leave ripples.
How it works
Every corner on the outer wall is a hard stop and a restart. If they're abrupt, the head vibrates for an instant after the corner, and that vibration gets printed as ripples (so-called “ghosting”). At 5000 mm/s² (the default), a little below the normal acceleration, corners come out clean on a printer with vibration compensation, like Bambu printers.
When to change it
- A box or a cube with ripples right after each corner: lower to 2000–3000.
- Shiny or silk filaments, where every ripple catches the light: 2500.
- A prototype that's only for checking measurements: you can match the normal acceleration (6000).
Typical values
| Value | What for |
|---|---|
| 2500 | Very clean corners; shiny filaments |
| 5000 | Defaultdefault |
| 6000 | Same as normal acceleration |
Watch out for
- Lowering it adds little print time: the outer wall is a small share of the total.
- If the ripples are still there at 2000, run the printer's vibration compensation calibration.
Goes well with
What Bambu Studio saysits help card, quoted
What Bambu Studio says
Acceleration of outer wall. Using a lower value can improve quality
Bambu Studio tooltip for this setting · AGPL-3.0
Read more at the official source
In your profile0.20mm Standard @BBL A1 · 5000 mm/s² · changes with the profile
In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to5000 mm/s²
Helps with
In other slicers
- Orca Slicer
- Outer wallSpeed › Acceleration
- PrusaSlicer
- External perimetersSpeed › Acceleration control (advanced)
- Cura
- Outer Wall AccelerationSpeedOnly used with acceleration_enabled on.
Names taken from each program's code (Orca Slicer 2.4.2, PrusaSlicer 2.9.6, Cura 5.13.0). Credits