4028 fan setup
hey guys, trying to setup my 4028 fan right now and currently run into this issue, not sure what to do about it
if someone could please help that would be amazing!
53 Replies
issue is that the PA8 pin is already used by the part cooling fan.
plus it is an Mosfet output, which cant be used for the tacho signal
was following this wiring guide
which header should i put the pwm into
sorry, thats what im trying to get working, currently fan just isnt working at all
PWM is not the Tacho
i realized that now reading
oh wait the fan is working now, i just power cycled it weird
Tacho is a signal cable that gives a puls or two each rotation. that way klipper can check if the fan is actually moving
it doesnt seem like its turning off
right now both my fans in mainsail say 0 percent but they are both on
with no pwm signal the 4028 will mostlikely default to full speed
so the hotend fan is working but part cooling when i try adjusting just isnt changing speed
thats the part ive come to lol
I have the exact same problem right now in my thread just below!
let me hop on into that
haha
No I think yours is a bit different
gotcha
yeah my 4028 is just running right now
My machine was working fine for a year, stopped using it for a month and now when PWM is at zero it’s 100%
i dont think mine is at 100
or else i would here it, and the ducts dont feel like it
What 4028 fan are you using?
i think sanyo forgot and label is below
Are you using the tacho wire by accident? or the PWM wire
what board are you using?
3 or 4 wires?
3 wires
Octopus 1.1
red black yellow
Yeah same as me
which ports are you power and tach plugged into
i think maybe my wiring is a bit messed up
If it only has 3 wires there are no tachs
Just Power GND and PWM
So you can’t really mess it up
Is it a 12V sanyo?
yep
i changed jumper
which port is the pwm supposed to be in then
yep have that
Lemme look at your CFG
1min
no prob
thanks!
[fan]
pin: !fan_part_cooling_pin
shutdown_speed: 1.0
Put this in your user overide section
this whole section looks strange tbh
3 time defining the same fan
i deleted that
since it was pwm
yeah nuke this
just define it in the user overide section at the bottom of your CFG
alright did that
the problem is you are asking the machine to do 3 different things
fan is still just idlying
idling
i put that in, no difference at 0 vs 100 percent
is it like 50%
yeah roughly
well that must mean the PWM is working, as these fans just go to 100% if there is a PWM failure
When you turn on the machine does it go to 100% straight off the bat then slow down?
like just kill power?
yeah it kinda sounds like it
then after a few secs it goes to thsi 50% idle mode?
hold on, checking continuity on the pwm wire and its not reading, may need to recrimp
ok, so its still sitting at around 50 percent when i turn the printer on and such
when i try turning fan on same thing just sits at 50
and now the pi isnt connecting to the internet
yeah sorry bro, i think we are at the same roadblock, im not smart enough to figure it out lol 🤷♂️
Not a problem lol. My pi ain’t working now so gotta figure that out
@Jack is NOT tech Support gimme the actual part # pls
Crying will do when home. I ordered a new fan tho
ok another issue i ran into it seems, with the rat toolhead it doesnt seem to hit the y endstop lmao
Did you change the endstop, when changing the toolhead?
yeah
i fixed it added stand offs
fan is the one thing holding me back still
well what is the part number of the fan
https://discord.com/channels/582187371529764864/1271589957320048691/1272294238322688060
I had a similar issue. I updated Ratos and added stuff to my config.