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Process › Support› Support ironingenable_support_ironing

Support interface ironing

Smooths the top of the support interface (or of the raft) with the nozzle before the part rests on it, so the part's underside comes out smoother.

Greyed out (you can see it but not change it) unless “Enable support” is on and “Top interface layers” is greater than 0. See Enable support, Top interface layers.

How it works

Ironing is a pass of the hot nozzle, laying almost no plastic, over a freshly printed surface: it melts the ridges between lines and leaves it smooth. It's normally used on the top face of the part; here it's used on the top face of the support, right where the part will rest.

Turning it on reveals its own pattern, speed, flow, spacing, inset and direction settings, just like regular ironing.

When to change it

  • The underside of a part that will be on show and that you can't orient any other way (the wing of a toy plane), with support filament in the interface.
  • A part resting on a raft whose base you want as smooth as possible.
  • It isn't worth it on parts where the supported face doesn't matter: it only adds time.

Typical values

ValueWhat for
OffDefaultdefault
OnSmoother underside; needs a solid interface

Watch out for

  • It only works if the interface is solid: “Top interface spacing” at 0 and an “Interface pattern” other than “Grid”. Otherwise, the slicer doesn't iron.
  • It's grayed out unless you have support with interface layers or a raft of more than one layer.

Goes well with

Top interface spacingInterface patternSupport ironing flowIroning Type
What Bambu Studio saysits help card, quoted

What Bambu Studio says

Ironing is using small flow to print on same height of surface again to make flat surface more smooth. This setting controls whether support interface or raft interface will be ironned.Support ironing could only works on solid interface,that is, support_interface_spacing was zero and support_interface_pattern was't grid

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 · No

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

In other slicers

Orca Slicer
Ironing Support InterfaceSupport › Support ironing
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