[Review request] Support multiple part cooling fans

[Viesturz]

Just for reference there have been several threads requesting this:

Is adding multiple part cooling fans possible?

So i have a toolchaning corexy with 3 hotends, everything works fine but i can’t figure out how to add more part cooling fans and assign them to a hotend. If anyone knows how I would really appreciate it. my config down below if it’s of any interest. # This file contains common pin mappings for the BigTreeTech Octopus. # To use this config, the firmware should be compiled for the # STM32F446 with a "32KiB bootloader" and a "12MHz crystal" clock reference. # See docs/Config_Reference.md for a…

Multiple Part Cooling Fans (M106/M107 controlled)

I have been running Klipper with a toolhead that has two part cooling fans that both run off of the same signal. Therefore, when an M106 command is run, they both operate in parallel. I am experimenting with a new tool head that requires each part cooling fan (there are 2) to be controlled independently. I have the second part cooling fan controlled using a [fan_generic] section and I am able to manually control it using SET_FAN_SPEED command. [fan_generic extruder1_partfan] #controls right …