StepDown 24V-->12V for Noctua Fan

dc42

@d0minik96 said in StepDown 24V-->12V for Noctua Fan:

I did some more testing:

The buck converter works. I directly solderd my fan to the buck converter and i had 12 V on the fan and the fan was moving quieter than before.

But after using the cables of my Artillery it is running with 24 V again.

So there must be a problem with the wiring. I am using the preinstalled
ribbon cables of my Artillery. There is a small pcb inside of the printer where the cables change from ribbon to normal. Im sure that i have the right pair, as the fan is not moving when disconnect this 2 specific wires. My guess is that on the PCB is something that converts my 12 V to 24 V but i am not sure why. I will check google if this is common Artillery problem....

Most likely that PCB is using a common positive wire for the hot end heater and the fan.

d0minik96

@dc42 yes i just found out, that the 24V line is shared, so that is where my problem is comming from. I solved it by placing the buck converter between my PCB and the Fan at the hotend.

jens55

... and this is why I am reluctant to help people over the internet. You just can't rely on them to convey the true nature of the situation. It is always tainted by the same mind that can't see the forest for the trees.
If we had known that the wiring involved the printer rather than going straight from the power supply to the buck converter and straight from the converter to the fan then instead of 22 posts on this issue it would have been just a hand full.

That's a whole lot of people trying to help one person that can't be bothered to fully explain how things are connected.

d0minik96

I'm sorry that i wasted your lifetime. Ty all for your suggestions. Helped me to find the problem !

alankilian

@d0minik96 said in StepDown 24V-->12V for Noctua Fan:

Ty all for your suggestions. Helped me to find the problem !

Hey, you got a working step-down converter and fan, so it's all good.

I hope next time when someone says "...just in case you missed something, can you post a photograph of your wiring and maybe a video of your testing?" you can take the time to do that. I could have saved you a lot of time and frustration.

MarkJohnston09

I have also checked the converter with my drone DJI Mini, and it worked quite well.