Basic Information: Printer Model: Ender 3v2 MCU / Printerboard: SKR Mini E3 v3.0 Host / SBC Raspberry Pi 3B+ klippy.zip (1.3 MB) Description of the issue: I just set up my new Motherboard as a replacement of the Stock Creality 4.2.2 board. So far everything works fine besides the PWM fans. I…

Could you draw a picture of how you tried to wire the fan? Pictures of the actual wiring would be helpful. What are you going to try and return, the fan or the “motherboard”? I don’t think you can do either as it’s really your fault that you killed them.

[image] reneas: Okay so today I tried this setup and it broke my motherboard… Sh*t! But you are alive. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ [image] hcet14: I guess you have little electronics experience. You never answered that question. Please ask, what to do…

[image] hcet14: Sh*t! But you are alive. I really apprechiate your concerns but I don’t think it was that dangerous since everything running here has a mximum of 24V DC coming from the PSU. It is then even converted to 12 V before going to the fan. [image] hcet14: You never answered that…

[image] reneas: My wiring looks like this: [Wiring_Noctua] Why did you connect your 24V/12V converter to the fan output and not the printer’s power supply? Going back over the thread, that’s NOT what @hcet14 drew (although, to be fair, he doesn’t make it clear you need a common Ground betw…

[image] mykepredko: Why did you connect your 24V/12V converter to the fan output and not the printer’s power supply? At first I wanted to do that but then all the outputs of the board will run on 12V and I thought that the heaters for the bed and the extruder need 24V to work properly. I mea…

Power connection should be so: [grafik]

Okay but the ground of the converter needs to be connected as well?

[image] reneas: [image] mykepredko: Regardless, you connected the yellow wire to the power coming in to the SKR Mini E3 V3 at a fan connector BUT you connected the black wire to the switched output of the fan and this will be floating UNLESS you have the fan running with a 100% duty cycle. …

[image] reneas: I don’t have a lot of experience working with electronics but I am aware of the basics :cry: [image] mykepredko: When you said you knew some basic rules in electronics, I suggest that you add “Have a common Ground to all the circuits.” I like that. Reminds of “Good Eve…

[image] hcet14: … and come out with something like this [fan_pin_conv_all_fine] All the latest schematics are nonsense in my eyes! Okay will try this! [image] hcet14: In my connection proposal are the used heathers close together, it should be easy to connect with a multicore cable. D…

Noctua 4-pin PWM fan speed control

General Discussion

EddyMI3D July 4, 2024, 1:00pm 18

Power connection should be so:

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Noctua 4-pin PWM fan speed control

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