First layers with special auxiliary fan
How many layers at the start use a separate speed on the auxiliary fan. On printers without that fan, like the A1, this does nothing.
How it works
Some printers (several Bambu Lab ones among them) have an auxiliary fan that blows on the part from the side, in addition to the fan on the print head. These settings control it the same way as the part cooling fan: some initial layers with their own speed, an optional ramp and a speed for the rest.
The A1 has no auxiliary fan (its machine profile says so). The slicer shows these settings anyway, but without that fan they do nothing.
When to change it
- If your printer has no auxiliary fan (like the A1): don't touch it.
- With a printer that has one: 1 or more, so it doesn't blow on the first layer.
Typical values
| Value | What for |
|---|---|
| 1 | PLA Basicdefault |
Watch out for
- Don't confuse it with the part cooling fan (the one on the print head), set further up in this same tab.
Goes well with
What Bambu Studio saysits help card, quoted
What Bambu Studio says
Set special auxiliary cooling fan for the first certain layers.
Bambu Studio tooltip for this setting · AGPL-3.0
Read more at the official source
In your profileBambu PLA Basic @BBL A1 · 1 layers
In Bambu Studio, the profile Bambu PLA Basic @BBL A1 sets it to1 layers
Using another slicer? Look for the idea, not the name: in Orca Slicer almost everything has the same name; in PrusaSlicer or Cura it may be called something else, or not exist.