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    E0/E1 Terminal pins are backwards on silkscreen for DuetWifi

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    Duet Hardware and wiring
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    • jamesarm97undefined
      jamesarm97
      last edited by

      The silkscreen for the DuetWifi I downloaded shows E0/VIN backwards from what my board has. This normally would not matter but I use the E0 +12V output as a common to feed the two fans so they polarity matters. The VIN on both E0 and E1 are closer to the LED's and - are closer to the stepper connectors.

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      • Dougal1957undefined
        Dougal1957
        last edited by

        Why not use the Onboard Fan Headers?

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        • T3P3Tonyundefined
          T3P3Tony administrators
          last edited by

          Yes there is an error on the silkscreen, please use this as a reference: https://duet3d.com/wiki/Duet_WiFi_wiring_diagrams

          www.duet3d.com

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          • deckingmanundefined
            deckingman
            last edited by

            But as Doug said, why do you want to connect fans to the heater terminals?

            Ian
            https://somei3deas.wordpress.com/
            https://www.youtube.com/@deckingman

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            • hairy_kiwiundefined
              hairy_kiwi
              last edited by

              @deckingman:

              But as Doug said, why do you want to connect fans to the heater terminals?

              Doing so reduces the total number of wires required between controller and extruder. Mendel90 is a good example: To fit an E3DV6 hotend with its active cooling fan, without running any extra wires (ribbon cable, remember) requires using a common 12V for heater and fan, while still making use of (independent) switched grounds for both those circuits.

              Page 67 of the Mendel90 build manual shows only the (switched) ground connected to the Melzi controller board:
              https://github.com/nophead/Mendel90/blob/master/dibond/manual/Mendel90_Dibond.pdf

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              • T3P3Tonyundefined
                T3P3Tony administrators
                last edited by

                Yes this is fine for the shared VIN. Just be careful with grounds especially with thermistor ground as that is on a seperate circuit.

                www.duet3d.com

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