24 volt fan with PWM control

[Zseven]

Hello, I have a question about the wiring of a fan.
I have a 24 volt fan with PWM control.

My motherboard is a 6XD.

Can anyone help me?


[Phaedrux]

What is your question? Please provide more information.

[Zseven]

@Phaedrux
Which pins can I use?

[Phaedrux]

Can you give some information about your fan?

Have you seen this? https://docs.duet3d.com/en/User_manual/Connecting_hardware/Fans_connecting

[Zseven]

@Phaedrux Yes, I have read it but not understood it.
The fan has 3 pins 1x +24v 1x - 1x pwm

Which is the pwm output?
Outx-
Or outx.tach

[Phaedrux]

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Fans_connecting#connecting-fans-to-duet-fan-pins

Click the tab for 4wire fans.

[Zseven]

@Phaedrux

I have connected the fan and set the parameter Q1000. If I set the speed in the DWC to 95%, the motor burns out!

[Phaedrux]

Can you give more detail about what exactly you are connecting?

[Zseven]

@Phaedrux

Hello ,
I have
+24V at Out5 / V_OutLC1
-Out 5 / GND
PWM at Out 5 / out5-

in config.g

M950 F2 C‘!out5’ Q1000
M106 P2 S0.0 H-1 C ‘Blower’

[oliof]

@Zseven I assume this is a CPAP/vacuum blower control PCB and not a standard fan, is that correct?

[Zseven]

@oliof

Yes !

[oliof]

@Zseven then you need to give us more details. Type of blower, how everything is wired between the PCB and the Blower and the control board, etc.

I highly doubt the Duet board can burn out the big blower because those fan ports are limited to 1A; I assume the blowers pull more than that.

[Zseven]

@oliof

Hello ,
I have requested the data sheet from the manufacturer.

[Zseven]

@oliof

ello ,
I have now got a replacement as the last fan has burnt out.

DC7-24V brushless turbo fan motor 100000 rpm high speed aluminium alloy impeller with brushless motor and speed controller

I have now connected the fan direnkt to the 24V power supply and I can control it very well with the potentiometer

I have now measured the voltage at the potentiometer and between the red and black cable are 5V

The yellow cable should be the PWM signal.

How can I now control this fan with the Duet 6xd?

Witch pins ?

[oliof]

The wiring on the photo does not match the wiring on the PCB graphics.

If you could provide a link to the listing and/or a full spec sheet that would help. "PWM control" can mean different things, in this case it could be 0-5V for example which would require extra circuitry.

[Zseven]

@oliof

I have fix it !

[oliof]

@Zseven please share your fixed setup for the benefit of all (-;

[Zseven]

@oliof

Hello ,
here is my solution for the 6XD board