Solved 4 pin 5V fan on 3 Mini
Hi, I have a 4 pin 5V fan I would like to use as a hot end fan on the on 3 Mini. Just want to check how to wire it.
I'm supplying EXT 5V anyway to power LEDs.
If I use OUT 3 to control the fan, can I connect as follows
Fan Black to OUT3 - GND
Fan Yellow to OUT3 - out3.tach
Fan Blue to OUT3 - out3-
Can I just connect Fan Red to 5V PWM - 5V_EXT ?
@richardmckenna yes that should work.
@dc42 Perfect thanks
@dc42 ok not quite working. If I config like:
M950 F1 C"out3" Q25000 M106 P1 C"Fan" S0 H-1
Also tried inverting the pin with, which I think you are supposed to do with 4 wire PWM fans
M950 F1 C"!out3" Q25000 M106 P1 C"Fan" S0 H-1
M106 P1 S1and
M106 P1 S0doesn't do anything.
If I disconnect the Blue PWN wire the fan operates at 100% as it should (according to it's datasheet) so it's getting power.
ok I have got somewhere, connecting as above I could not get it to work.
So I'm now connected:
Fan Red (+) -
Fan Black (-) -
Fan Blue (PWM) -
Fan Yellow (FOO) -
and in the config I have:
M950 F1 C"vfd+out3" Q25000