I am replacing the fans for a quieter experience, thanks to those who posted ideas. I have a 24v fan for the extruder but it only has 2 wires, while the connector has 4. Any way to fake out the machine to get this working or am I going to need to find a fan with the proper connector? TIA
You can disable the tachometer function by editing printer.cfg.
[fan]
pin: extra_mcu:PB0 #FAN3
max_power: 1.0
tachometer_pin: extra_mcu:PA3
tachometer_ppr: 2
tachometer_poll_interval: 0.00125
[heater_fan hotend_fan]
pin: extra_mcu:PA7 #FAN2
max_power: 1.0
kick_start_time: 0.5
heater: extruder
heater_temp: 45
tachometer_pin: extra_mcu:PA2
tachometer_ppr: 2
tachometer_poll_interval: 0.0015
To
[fan]
pin: extra_mcu:PB0 #FAN3
max_power: 1.0
# tachometer_pin: extra_mcu:PA3
# tachometer_ppr: 2
# tachometer_poll_interval: 0.00125
[heater_fan hotend_fan]
pin: extra_mcu:PA7 #FAN2
max_power: 1.0
kick_start_time: 0.5
heater: extruder
heater_temp: 45
# tachometer_pin: extra_mcu:PA2
# tachometer_ppr: 2
# tachometer_poll_interval: 0.0015
So a 2 wire fan goes [+] on PB0 OR PA7 and [-] on the GNG of the same plug.
You could also wire 24V and GNG for the heatsink and it would run 100% at all times.
fantastic info, thanks so much! will give it a try