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    Duet 3 Mini 5 with 8 fans

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    Duet Hardware and wiring
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    • JADoglioundefined
      JADoglio
      last edited by JADoglio

      I need a bit of information on the VFD pin and a sanity check on the rest. I think this should work, does anyone see any issues I am missing ?

      I am building a Voron 2.4r2. I want to add active chamber heating by adding fans under the bed to distribute heat to the chamber more efficiently. Many have successfully done this and I am using a published mod to add 4 - 4015 fans to the chamber. The problem is that the Duet 3 Mini 5 only has 4 fan inputs (Out 3, Out 4, Out 5, and Out 6). The configurator seems to indicate I can also use the VFD pins for a fan but I have not found any documentation on that. The bed on the Voron is 110V and will be connected with a 24vdc to 110vac SSR.

      So, my plan is as follows:
      Heaters:
      Out 1 = Hot End Heater
      Out 2 = Bed Heater
      Fans
      Out 3 = Parts Cooling Fan
      Out 4 = Hot End Cooling Fan
      Out 5 = Electronics Cooling Fan 0
      Out 6 = Electronics Cooling Fan 1
      FVD = Not Sure can some one tell me if this can be used for a fan and if it can how should it be wired?

      As a result, I have Out 0 open because I am not powering the bed with it. Therefore, I would like to connect 4 fans, using a header, to this power source so all 4 chamber fans can be controlled with a P1000 probe on Temp 3.

      Thanks for any assistance.

      dc42undefined 1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators @JADoglio
        last edited by

        @JADoglio the VFD output is controlled by the same microcontroller output as OUT6 as described at https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mini_5+_Hardware_Overview so you can't use both.

        You can use OUT0 to drive fans as you are not using it to control a heater.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

        JADoglioundefined 1 Reply Last reply Reply Quote 0
        • JADoglioundefined
          JADoglio @dc42
          last edited by

          @dc42 Thanks. I did read that and I thought that would be the case but I wasn't sure and wanted to check. Appreciate the quick response.

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