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    PWM fan0/fan1 output dead

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    Duet Hardware and wiring
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    • m3phoundefined
      m3pho
      last edited by

      Hi. Do you repair boards? I think I've managed to fry the fan1/fan2 PWM output. It'll give 24v but the fan just whines and won't turn. I've tried other fans and they all do the same. I'm currently using the duex.fan3 and duex.fan4 outputs instead as a getaround. It's been a while since I printed or did anything with the printer so I'm a little rusty so many be even doing something wrong myself??

      it's an E3D Toolchanger, currently no hot end on T3

      ; Fans
      M950 F0 C"Fan0"; create fan 0 on pin fan0
      M106 P0 H-1 C"Tool Fan" ; set Tool fan. Thermostatic control is off
      ;M950 F1 C"fan1"
      ;M950 F2 C"fan2"
      M950 F1 C"duex.fan3"
      M950 F2 C"duex.fan4"
      M950 F3 C"duex.fan5"
      M950 F4 C"duex.fan6"
      M950 F5 C"duex.fan7"
      M950 F6 C"duex.fan8"
      M950 F7 C"fan1"
      M950 F8 C"fan2"

      ; Tools
      M563 P0 S"T0" D0 H1 F2 ; Define tool 0
      G10 P0 X0 Y0 Z0 ; Reset tool 0 axis offsets
      G10 P0 R0 S0 ; Reset initial tool 0 active and standby temperatures to 0C

      M563 P1 S"T1" D1 H2 F4 ; Define tool 1
      G10 P1 X-0.8 Y0.1 Z0 ; Reset tool 1 axis offsets
      G10 P1 R0 S0 ; Reset initial tool 1 active and standby temperatures to 0C

      M563 P2 S"T2" D2 H3 F6 ; Define tool 2
      G10 P2 X-0.75 Y0.3 Z0 ; Reset tool 2 axis offsets
      G10 P2 R0 S0 ; Reset initial tool 2 active and standby temperatures to 0C

      m3phoundefined 1 Reply Last reply Reply Quote 0
      • m3phoundefined
        m3pho @m3pho
        last edited by

        Forgot to mention it's a Duet 2 wifi. I actually have 2 boards with this same fault.

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        • Phaedruxundefined
          Phaedrux Moderator
          last edited by

          It's possible the mosfets for those fan ports are damaged.

          See here for an example along with the part numbers for replacement.

          https://docs.duet3d.com/en/User_manual/Troubleshooting/Parts#fan-mosfet

          We don't offer repairs directly, but you may be able to find a shop locally that can do the repair.

          Z-Bot CoreXY Build | Thingiverse Profile

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