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Options for setup a board fan....

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  • undefined
    peirof
    last edited by peirof 26 Feb 2022, 03:41

    Hi,

    I would like to add a box fan, which is above the drivers. I've read that it's not necessary, but I'd still like to... And I have some questions:

    • I have the shockets for 2 pin fans occupied, can I connect a 2-wire vent to a 4-pin shocket?

    • If I can't, what other shock do you recommend? , it sounds to me that in Duet 3 mini there are 2 2-pin shockets.

    • Duet 3 mini does not monitor the temperature of the plate... So to control that fan I can think of three ideas. Which do you see better:
      A - Configure as always on fan
      B - Set it as a layer fan, when it reaches a certain layer it will turn on, this system I like but it has the drawback, that if the material does not use layer ventilation, it will not turn on. No
      C - Set it as temperature controlled? when the hotend reaches a certain temperature that turns on.... This seems like the best option
      D - install a thermistor over drivers, and control these fan with thermistor?

    Do you use something similar? How do you have it configured

    Thx

    undefined 1 Reply Last reply 26 Feb 2022, 06:39 Reply Quote 0
    • undefined
      Barracuda72 @peirof
      last edited by 26 Feb 2022, 06:39

      @peirof The 4 pin Fan ports also support 2 wire Fans.( see [https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mini_5+_Hardware_Overview]
      the cooling pads of the driver are on the backside of the PCB..so best would be if the cooling air comes from the side.
      In my Voron i used this solution:

      M950 F5 C"out5" Q100 ; Creates Case Fan 1
      M106 P5 T40 L0.4 X0.4 H3 ; Case Fan 1 Settings (Turns on at 40°C tool temp) at low speed
      M950 F6 C"out6" Q100 ; Creates Case Fan 2
      M106 P6 T40 L0.4 X0.4 H3 ; Case Fan 2 Settings (Turns on at 40°C tool temp) at low speed
      and hooked them up to the MCU Temp
      M308 S3 A"MCU" Y"mcu-temp"

      Others connected the fans to the hotend tempsensor...so if you start to print it starts to cool the board

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