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Process › Others› Prime towerprime_tower_extra_rib_length

Extra rib length

Makes the prime tower's ribs longer or shorter than what the slicer calculates. Longer, the tower is sturdier, but it takes up more of the plate.

Not always visible. In Bambu Studio this setting only shows up when “Enable” is on and “Rib wall” is on. See Enable, Rib wall.

How it works

The slicer calculates a rib size from the tower's height, and this number is added to it: positive makes them longer, negative makes them shorter.

It can't go below the minimum set by the amount of filament that has to be purged.

When to change it

  • For almost anything: 0, the default.
  • A tall multicolor figure whose tower wobbles: +5 to +10 mm.
  • A plate full of two-color keychains, with a short tower: −5 mm.

Typical values

ValueWhat for
0Defaultdefault
+5 to +10 mmSturdier
−5 mmLess plate space

Watch out for

  • It only exists with “Rib wall” turned on.

Goes well with

Rib wallRib width
What Bambu Studio saysits help card, quoted

What Bambu Studio says

Positive values can increase the size of the rib wall, while negative values can reduce the size.However, the size of the rib wall can not be smaller than that determined by the cleaning volume.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source

This setting on the Bambu Lab wiki
In your profile0.20mm Standard @BBL A1 · 0 mm

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to0 mm

In other slicers

Orca Slicer
Extra rib lengthMultimaterial › Prime tower
PrusaSlicer
No clear equivalent.
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