Rat Rig Minion Fan issues
I have 3 Noctuna fans I want to put on for the controller board and hot end (not part cooling). Part cooling works fine but controller box and hot end fan act like they're dead.
Tried each different locations, different wiring. they are running on the 12V rail on the SKRat
25 Replies
Your title says you are having an issue, but your post doesn't describe what your issue is?
wise-white•12mo ago
fixed
well looking at https://github.com/bigtreetech/SKRat/blob/master/Hardware/BTT_SKRat_V1.0_PIN.pdf you are going to have a problem.
You want to have
* part cooling fan
* hotend cooling fan
* controller fan 1
* controller fan 2
* controller fan 3
that's a total of 5, but your board only allows you to control 4 of them
GitHub
SKRat/BTT_SKRat_V1.0_PIN.pdf at master · bigtreetech/SKRat
Contribute to bigtreetech/SKRat development by creating an account on GitHub.
wise-white•12mo ago
part cooling works fine it's the others
2 fans in the controller box dont work nor does the one on the hotend
so do i need to specify the pins in config?
* part cooling fan
* hotend cooling fan
* controller fan
are all included with the pin definitions already. Have you verified the fans work? Have you verified that the board is outputting 12v?
wise-white•12mo ago
verified fans work. the SKrat board has rails for jumpers for 24, 12, and 5v. the jumpers and the fans are connected to are 12v (they're 12v fans)
No power going to it
Shit
Wait helps to turn stuff on...
No dice
Ugh
wiring looks good
just redid the wiring, same result
probably yet another shitty BTT board
did you test with a multimeter?
wise-white•12mo ago
yeah
no voltage
checked the wire and nothing wrong with it
upload a picture of your board and wiring
wise-white•12mo ago
It's a rats nest (lol) because I'm still in process of some updates
wise-white•12mo ago
In the one with my thump you can barely see the jumpers but all except the first are on 12v. All the fans I'm trying to run are 12v
Nm the one without my had in the jumpers
let me check something, something looks off with the jumpers now that i see the pic
nm the jumpers are good
yeah that probably isn't helping you. Clean up your wiring - disconnect things that don't matter for right now
turn the power off - and disconnect everything that isn't
* DC power in to the board
* thermistors
* fans you are trying to test
wise-white•12mo ago
Now you need to get out your multimeter and test
* dc power in to the board
* turn on fan in mainsail interface and then check port is outputting 12v DC
wise-white•12mo ago
I can't turn on the fans that aren't working
Oh nm I see
I gotta fix the fucking heater now
add
that will turn the toolhead fan on until it reaches 10C
wise-white•12mo ago
Need to fix this weak as fuck thermistor wire now
You really like the word fuck don't you?
wise-white•12mo ago
Apparently
Ok fixed the thermistor I broke, trying what you said now
so mainsail says it's spinning but it isnt. when i checked the voltage it was well below even 5v (like under 1v)
so guessing board issue?
tested on the 12v plugs
These fans don't even work alone on my 12v PSU
nm they work, helps to have the PSU on
Still nothing on the printer
Even the spot for always on isn't working I'm just going to swap this one
and you verified the voltage in is correct?
wise-white•12mo ago
It said 5v when it's supposed to be 12
I'm just exchanging the board
Tired of putting time into this right now
if your PSU is only supplying 5v in to the board, it doesn't matter if you exchange the board
I believe that board wants 24v in, so if you are in 120v land and your PSU is setup for 220v land that could explain why the voltages are wrong
wise-white•12mo ago
the SKRat has jumpers on 3 rails
24v, 12v, and 5v
it wasnt working at all on the 12v
PSU is 120v
I just ordered some 24v fans keys see if they work
Realized I had some 24v fans, same issue
Wait nm
But did you actually measure the output?
wise-white•12mo ago
I did not yet
23.8