Ironing flow
How much plastic the nozzle releases while ironing, as a percentage of what it releases on a normal layer. Too little won't fill the grooves; too much leaves the surface lumpy.
How it works
When ironing, most of the work is done by the heat of the nozzle; the extra plastic only fills the valleys between lines. That's why the value is small: Bambu's profiles use 10% of normal.
Since ironing lines are very close together, the nozzle passes over each spot several times. That 10% is already enough material.
When to change it
- An ironed box lid that still shows grooves: raise it to 12 or 15%.
- A sign that ends up with bumps, a lip on the edge or strings: lower it to 8% and check “Ironing line spacing”.
- A filament that drips a lot from the nozzle, like some PETG: start at 8%.
Typical values
| Value | What for |
|---|---|
| 8% | Filaments that drip |
| 10% | Defaultdefault |
| 15% | Grooves that won't close |
Watch out for
- If the surface ends up with “waves” or a lip on the edge, the usual cause is too much plastic: it's material piling up as the nozzle pushes it along.
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% · changes with the profile
In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to10%
In other slicers
- Orca Slicer
- Ironing flowQuality › Ironing
- PrusaSlicer
- Flow rateInfill › Ironing
- Cura
- Ironing FlowTop/Bottom
Names taken from each program's code (Orca Slicer 2.4.2, PrusaSlicer 2.9.6, Cura 5.13.0). Credits