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    Duet3 6HC v1.02 and later

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    • Sophiechkaundefined
      Sophiechka
      last edited by

      Hi, In the Duet3 documentation (https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6XD_Hardware_Overview) have read that the maximum voltage intput for Duet 3 Mainboard 6HC v1.02 and later is V48. Not 32V. Is the version written on the board? How do I know which version I would be buying?

      I am hoping to use a stepper motor, either NEMA 34 or stronger, with the Duet 3 Mainboard 6HC. Does the board have the same output voltage as the input?

      If not, can I add an external power supply to the stepper motor?

      oliofundefined dc42undefined 2 Replies Last reply Reply Quote 0
      • oliofundefined
        oliof @Sophiechka
        last edited by oliof

        @Sophiechka I believe the actual version number is part of the silkscreen of the back of the board. Input voltage is output voltage for the motors, other IO is either VIN or 12V (switchable per bank).

        <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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        • Sophiechkaundefined
          Sophiechka
          last edited by

          Thank you. Since the input voltage is the output voltage, I just need to make sure to buy the Duet 3 Mainboard 6HC with version 1.02 or later.

          Is it possible to have an external power supply or a higher voltage than 48V for the stepper driver? As the maximum voltage the stepper driver can handle is 60V?

          oliofundefined 1 Reply Last reply Reply Quote 0
          • oliofundefined
            oliof @Sophiechka
            last edited by

            @Sophiechka you also need to consider the maximum voltage of the capacitors, the capacitors variance (5 or 10 percent, depending), and the PCB design limits. Just because the nominal maximum of the drivers is 60V doesn't mean it's a safe practical maximum in this particular application.

            NB: 48V is already in the danger zone (i.e. you should treat it like 110/220V AC in terms of safety precautions).

            <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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            • dc42undefined
              dc42 administrators @Sophiechka
              last edited by

              @Sophiechka maximum recommended voltage for the 6HC 1.02 is 50V. When you turn off a stepper motor, it feeds power back into the power rail, causing the voltage to rise. That's why you need to keep the power voltage well below the stepper driver rating of 60V.

              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

              Sophiechkaundefined 1 Reply Last reply Reply Quote 0
              • Sophiechkaundefined
                Sophiechka @dc42
                last edited by

                @dc42 hello
                thank you for the info. I will use V48. would V48 goes in the range of the power voltage well below the stepper driver rating of 60V?

                If I use one NEMA 34 and four NEMA 23 together with the Duet3 6HC v1.02, would the correct/sufficient voltage will be distributed to the stepper motors by the driver? e.g V48 for NEMA 34 and V36 for NEMA 23

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