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Process › Speed› Accelerationdefault_acceleration

Normal printing acceleration

How hard the print head speeds up and brakes on any line that doesn't have its own acceleration. More acceleration means less time on short stretches, but more vibration.

How it works

Speed is how fast the head goes once it's moving; acceleration is how quickly it gets to that speed. On a short stretch, just a few millimeters long, the head never reaches the requested speed: it spends the whole stretch speeding up and slowing down. That's why, on detailed parts, acceleration matters more than speed.

At 6000 mm/s² (the default), a printer with vibration compensation (like Bambu printers) doesn't leave ripples at every corner. The outer wall, the top surface, the first layer and travel moves have their own accelerations that override this one; the infill uses a percentage of it.

When to change it

  • Most parts: leave 6000.
  • A box with raised lettering that shows ripples after every corner, even on the inside walls: lower to 4000.
  • A prototype to check measurements, where only finishing fast matters: 8000–10,000.

Typical values

ValueWhat for
3000Gentle; less vibration
6000Defaultdefault
10000Top speed; more marks

Watch out for

  • The printer profile sets a maximum; whatever you put here won't go past it.
  • It only applies to lines whose own acceleration is set to 0.

Goes well with

Outer wallInner wallTop surfaceSparse infillTravel
What Bambu Studio saysits help card, quoted

What Bambu Studio says

The default acceleration of both normal printing and travel except initial layer

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 · 6000 mm/s² · changes with the profile

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to6000 mm/s²

It changes with the Bambu Lab A1 factory profile:0.08mm Extra Fine6000 mm/s²0.08mm High Quality4000 mm/s²0.12mm Fine6000 mm/s²0.12mm High Quality4000 mm/s²0.16mm High Quality4000 mm/s²0.16mm Optimal6000 mm/s²0.20mm Standard6000 mm/s²0.20mm Strength6000 mm/s²0.24mm Draft6000 mm/s²0.28mm Extra Draft6000 mm/s²Why does it change?

Helps with

The part shifts sideways

In other slicers

Orca Slicer
Normal printingSpeed › Acceleration
PrusaSlicer
DefaultSpeed › Acceleration control (advanced)
Cura
Print 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