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Process › Others› G-code outputreduce_infill_retraction_mode

Reduce infill retraction

Whether the printer pulls the filament back (retraction) when it moves without printing inside the infill. “Auto” skips it for filaments that ooze little (PLA) and keeps it for those that ooze more (PETG).

How it works

Retraction keeps the nozzle from oozing while it travels from one spot to another. Inside the infill, a little string doesn't matter because nobody sees it, so skipping retraction on those moves saves time and wear. But with filaments that ooze a lot, the plastic that comes out builds up and can poke through or leave blobs.

“Auto” decides based on the filament type; “Enabled” never retracts in the infill; “Disabled” always retracts.

When to change it

  • For almost everything: Auto (default).
  • A PETG part with blobs or strings in the infill that show through the top: Disabled.
  • A batch of quick PLA parts where you want to save every minute: Enabled.

Typical values

ValueWhat for
AutoDefaultdefault
DisabledAlways retracts
EnabledNever in the infill

Watch out for

  • Only affects moves that stay inside the infill area.

Goes well with

Avoid crossing wallSparse infill pattern
What Bambu Studio saysits help card, quoted

What Bambu Studio says

Controls whether retraction is skipped when traveling within the infill area. "Auto" enables this optimization for filaments with low metal stickiness (e.g. PLA) and disables it for medium/high metal stickiness filaments (e.g. PETG) to avoid oozing artifacts. "Enabled" always skips retraction in infill areas regardless of filament type. "Disabled" always retracts normally.

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 · Auto

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

In other slicers

Orca Slicer
Reduce infill retractionOthers › G-code outputIt's a checkbox: it doesn't have the automatic mode.
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