set_fan
Control 3D printer fan speed to cool bridges and overhangs. Set part, auxiliary, or chamber fan from 0 to 100 percent on supported printers.
Instructions
Set the speed of a printer fan.
Supported on Bambu Lab, OctoPrint, Moonraker/Klipper printers, and
Elegoo's Centauri Carbon (FDM). Prusa Link has no raw G-code endpoint, so
fan control isn't available there
(https://github.com/prusa3d/Prusa-Link/issues/832). Elegoo's resin/MSLA
printers (Saturn, Mars) have no part-cooling fan and are refused.
Args:
node: Which fan to set. ``"part"`` (part-cooling / model fan, the
one that cools each layer) works on every supported printer.
``"aux"`` (auxiliary / big fan) and ``"chamber"`` (chamber /
exhaust fan) are Bambu-only — generic Marlin/Klipper firmware has
no standard auxiliary or chamber fan Kiln can address without
knowing that machine's own G-code macros. Defaults to ``"part"``.
percent: Fan speed 0-100. ``0`` turns the fan off, ``100`` is full
speed. Defaults to ``100``.
Use this to add cooling for bridges and overhangs (part fan), or — on
Bambu — pull heat with the auxiliary fan or run the chamber/exhaust fan
for materials like ABS/ASA. The Bambu chamber fan only exists on
enclosed models — X1 Carbon, X1E, P1S, P2S, H2S — not on open-frame
models (A1, A1 Mini, A2L, P1P), where a chamber command is a no-op. The
printer's own thermal management may override a manual fan speed during
a print.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| node | No | part | |
| percent | No |