Support ironing flow
How much plastic the nozzle lays while ironing the support interface, as a percentage of a normal layer. Too little doesn't fill the grooves; too much leaves bumps.
How it works
Ironing isn't just heat: the nozzle lays a very thin thread of plastic that fills the valleys between lines. About 10% of a normal layer is roughly what fits in those valleys.
With less, the grooves stay; with more, there's excess plastic that the nozzle drags along, leaving waves or a ridge. It works just like the top surface “Ironing flow”.
When to change it
- Most parts: the default 10%.
- The underside of the part still comes out striped after ironing the interface: 12–15%.
- Bumps or a ridge appear at the edges: 6–8%.
Typical values
| Value | What for |
|---|---|
| 10% | Defaultdefault |
| 6–8% | If there's excess plastic |
| 12–15% | If grooves remain |
Watch out for
- It only shows up with support interface ironing turned on.
Goes well with
What Bambu Studio saysits help card, quoted
What Bambu Studio says
The amount of material to extrude during ironing. Relative to flow of normal layer height. Too high value results in overextrusion on the surface
Bambu Studio tooltip for this setting · AGPL-3.0
Read more at the official source
In your profile0.20mm Standard @BBL A1 · 10%
In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to10%
In other slicers
- Orca Slicer
- Support Ironing flowSupport › 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