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Process › Others› Prime towerenable_prime_tower

Prime tower

A throwaway tower where the nozzle gets rid of leftovers from the previous color after each filament change. With several colors, it's what keeps the colors clean.

How it works

When you change filament, some of the old plastic stays in the nozzle. The printer purges most of it through the waste chute at the back, but not all: the tower takes the last leftovers and steadies the pressure in the nozzle before going back to the part.

It comes turned on, but it only shows up on the plate if the print has several filaments, if “Timelapse” is set to “Smooth”, or if you turn on “Enable clumping detection”. On a single-color print it isn't generated.

When to change it

  • A two-color keychain or a sign with letters in another color: leave it on.
  • A multicolor prototype to check dimensions, where a few smudges at color changes don't matter: you can turn it off to save plastic.

Typical values

ValueWhat for
OnDefaultdefault
OffSaves plastic, with color smudges

Watch out for

  • It can't be combined with printing by object or with “Independent support layer height”.
  • The tower goes up to the last layer with a color change: if the changes are near the top, the tower is taller and uses more; rotating the part can save a lot.
  • How much gets purged at each change is set in the flushing volumes (next to the filament list), not here.

Goes well with

WidthRib wallFlush into objects' infillTimelapse
What Bambu Studio saysits help card, quoted

What Bambu Studio says

The wiping tower can be used to clean up the residue on the nozzle and stabilize the chamber pressure inside the nozzle, in order to avoid appearance defects when printing objects.

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 · Yes

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

In other slicers

Orca Slicer
EnableMultimaterial › Prime tower
PrusaSlicer
EnableMultiple Extruders › Wipe tower
Cura
Enable Prime TowerDual Extrusion

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