fans not turning on | VORONDesign | Page 1

delicate spruce Jan 16, 2026, 9:15 PM

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sb combo v2

fans are in aux board PB0 and PB11
fans tested work fine

when i turn them on in klipper the dont turn on

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i know the aux board is getting power because the rgbs are on

zinc plume Jan 16, 2026, 9:21 PM

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delicate spruce sb combo v2 fans are in aux board PB0 and PB11 fans tested work fine when i tu...

are these three pin tacho fans?

delicate spruce Jan 16, 2026, 9:25 PM

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no 2 pin

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and they are wired correctly

zinc plume Jan 16, 2026, 9:27 PM

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delicate spruce no 2 pin

i believe you should be using PB5 (fan1) for the hotend fan and PB6(fan2) for the part cooling fan

see here

delicate spruce Jan 16, 2026, 9:28 PM

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no thats what the aux board is for so its easier to take the faceplate off

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the 2 fan ports and rgb port on the aux is designed specifically for the face plate parts

zinc plume Jan 16, 2026, 9:32 PM

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delicate spruce the 2 fan ports and rgb port on the aux is designed specifically for the face pl...

i'm just going by what the documentation says

unfortunately, it doesn't really give much information on those 2 ports on the aux board

delicate spruce Jan 16, 2026, 9:33 PM

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zinc plume Jan 16, 2026, 9:34 PM

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delicate spruce

where is this from?

delicate spruce Jan 16, 2026, 9:37 PM

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google, but again they are 24v fan ports and as long as i set the config to [fan] & [heater_fan hotend_fan] and use correct pins it should work

zinc plume Jan 16, 2026, 9:38 PM

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delicate spruce google, but again they are 24v fan ports and as long as i set the config to [fan...

so, that's likely ai bs, it has a habit of hallucinating

delicate spruce Jan 16, 2026, 9:38 PM

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but what i said should work

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i even asked fystec themselves and they said it should

zinc plume Jan 16, 2026, 9:39 PM

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delicate spruce but what i said should work

ok, lets see photos of where they're plugged into

delicate spruce Jan 16, 2026, 9:39 PM

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ok 1 moment need to take it off the printer

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WhatsApp_Image_2026-01-16_at_21.40.55.jpeg

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ignore the tape its just to hold the wires down atm

slender pumice Jan 16, 2026, 9:45 PM

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I have my hotend fan on the aux board.

delicate spruce Jan 16, 2026, 9:45 PM

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do you have a sb combo v2?

slender pumice Jan 16, 2026, 9:45 PM

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Yep

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The printer is currently in first testing but hotend fan works.

delicate spruce Jan 16, 2026, 9:46 PM

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is your config the same as mine?

slender pumice Jan 16, 2026, 9:46 PM

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Do any of them work?

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The hotend heater fan needs more config than that.

delicate spruce Jan 16, 2026, 9:47 PM

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im just trying to get the fans to turn on no fans work but the rgb turns on

zinc plume Jan 16, 2026, 9:48 PM

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delicate spruce im just trying to get the fans to turn on no fans work but the rgb turns on

you have the correct voltage fans, 24v?

delicate spruce Jan 16, 2026, 9:49 PM

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yes

slender pumice Jan 16, 2026, 9:50 PM

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Try the default config first to see if you can at least control them manually.

pin: sb_can_th:PB0
max_power:1.0
shutdown_speed:0.0
cycle_time:0.5
hardware_pwm:false
kick_start_time:0.10
off_below:0.1
tachometer_pin: sb_can_th:PB10
#tachometer_ppr:
#tachometer_poll_interval:

[fan_generic ext_fan1]  # on the AUX board
pin: sb_can_th:PB7
max_power:1.0
shutdown_speed:0.0
cycle_time:0.5
hardware_pwm:false
kick_start_time:0.10
off_below:0.1
tachometer_pin: head:PA7
#tachometer_ppr:
#tachometer_poll_interval:```

delicate spruce Jan 16, 2026, 9:52 PM

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still not spinning

low dust Jan 16, 2026, 9:53 PM

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Did you change the pin to what they posted

delicate spruce Jan 16, 2026, 9:53 PM

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yea its the same pin as mine

slender pumice Jan 16, 2026, 9:54 PM

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Next step would be to confirm the fans actually work.

delicate spruce Jan 16, 2026, 9:54 PM

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tested fans already they work

slender pumice Jan 16, 2026, 9:54 PM

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I literally used that configuration today

delicate spruce Jan 16, 2026, 9:56 PM

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this is what im trying to figure out i tried this from there template and it just doesnt work

low dust Jan 16, 2026, 9:56 PM

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delicate spruce yea its the same pin as mine

One of them is not, they have pb7 instead of 11

delicate spruce Jan 16, 2026, 9:57 PM

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doesnt make a differance i put them both to 100% so one wouyld have came on

low dust Jan 16, 2026, 9:57 PM

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If you have a meter you should be able to check for 24v

delicate spruce Jan 16, 2026, 9:57 PM

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sadly i dont mine broke last week

slender pumice Jan 16, 2026, 9:58 PM

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Is the board fully setup? CAN or USB?

delicate spruce Jan 16, 2026, 9:58 PM

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USb

slender pumice Jan 16, 2026, 9:58 PM

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Me too.

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Definitely not misaligned the front?

delicate spruce Jan 16, 2026, 9:58 PM

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I HAD THE 1.3 SB WHICH WENT STRAIGHT INTO THE SPIDER V3 BUT THE V2S NEED THE PCB BOARD FOR CAN

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nothing misaligned

zinc plume Jan 16, 2026, 9:59 PM

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delicate spruce I HAD THE 1.3 SB WHICH WENT STRAIGHT INTO THE SPIDER V3 BUT THE V2S NEED THE PCB...

woah, why the shouting? 😆

slender pumice Jan 16, 2026, 9:59 PM

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Are you using the new cable and usb adapter?

delicate spruce Jan 16, 2026, 9:59 PM

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zinc plume woah, why the shouting? 😆

sausage fingers

delicate spruce Jan 16, 2026, 9:59 PM

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slender pumice Are you using the new cable and usb adapter?

usb adaptor

slender pumice Jan 16, 2026, 9:59 PM

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New cable?

delicate spruce Jan 16, 2026, 10:00 PM

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yea

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i would have fried my new board with the old cable lol

slender pumice Jan 16, 2026, 10:01 PM

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Tried plugging into the main toolhead board to check it’s not a faulty aux board?

delicate spruce Jan 16, 2026, 10:02 PM

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no but i can try that now lol

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the board was tested before being sent to me by fystec so it should work

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#fans not turning on