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    New duet wifi, stepper driver fried

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    Duet Hardware and wiring
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    • Zasquatchundefined
      Zasquatch
      last edited by

      I am testing the electronics for my coreXY machine before final assembly- first is the x-y axis before moving on to frame construction and z-axis.

      After setting up power and comms, I hooked up x and y steppers and x/y end stops.

      I sent a "move x axis 10mm" gcode and at that point the X stepper driver exploded and started smoking.

      I held back hysterical crying because my wife was in the room, and disconnected everything. I took a lap and calmed down.

      I then tested all remaining stepper drivers with the motor and confirmed everything else was still functional. All other drivers move the motor without issue.

      Based on the analysis above, I think i must have the 1:1,000,000 defective board. Can someone please help? I have a picture showing the damage (two charred holes in the x-driver chip) that I can send via email.

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      • number40fanundefined
        number40fan
        last edited by

        Upload them to imgbb.com and paste the BBB code here.

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        • Zasquatchundefined
          Zasquatch
          last edited by

          Thanks for the tip

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          • number40fanundefined
            number40fan
            last edited by

            Ouch. I have only been on here for a couple of months and seen a small handful of driver meltdowns. So you're not alone.

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            • dc42undefined
              dc42 administrators
              last edited by

              I'm sorry to hear that one of your stepper drivers has failed. Please ask your supplier for a replacement Duet under warranty. Also check the wiring between that driver and the motor, and test the stepper motor for short circuits across the winding, between windings, and between the windings and the frame.

              For statistical purposes, please tell us what model of stepper motor was connected to the faulty driver, what current it was set to, and what VIN voltage you were using.

              Given the number of these stepper drivers that we buy, it's not surprising that a few of them suffer infant mortality. However, the rate is higher than we would like, and I raised this in a meeting with the manufacturer last month.

              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

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              • Zasquatchundefined
                Zasquatch
                last edited by

                Awesome, thank you!!

                Steppers were these:

                https://www.omc-stepperonline.com/hybrid-stepper-motor/nema-17-bipolar-18deg-65ncm-92ozin-21a-336v-42x42x60mm-4-wires-17hs24-2104s.html?search=Nema%2017%20bipolar&limit=100

                Current was set to 0.8A

                Board is powered by 24V meanwell PS

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