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Smoked y driver on Duet 2 wifi after swapping out a motor.

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  • undefined
    Redheadrambo
    last edited by Redheadrambo 2 Jan 2020, 02:31 1 Feb 2020, 02:26

    So I was having trouble with y-axis losing steps here and there so I upped the current to 900mA. Worked for a while but I decided to replace the motor with a slightly larger nema 17 that I had laying around. The new motor just vibrated so I figured I had the wires in the wrong order(they were). Fixed them and it still did the same thing and there was a grounding error on screen. Next I put a motor I know was good on the y driver. Smoke. Panic. Kill power.

    Now what do I do?

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    • ?
      A Former User
      last edited by A Former User 2 Jan 2020, 02:45 1 Feb 2020, 02:32

      Did you swap the order with power applied?

      In any case https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond should be your best bet to diagnose wihtout further damage (if possible)

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      • undefined
        Redheadrambo
        last edited by 1 Feb 2020, 02:47

        Nope. Turned of power before pulling wires.

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        • ?
          A Former User
          last edited by 1 Feb 2020, 02:51

          Goodie, you should be able to safely work though the steps in wiki that states to do so wihtout Vin.

          Have you got a multimeter on hand?

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          • undefined
            Redheadrambo
            last edited by 1 Feb 2020, 05:59

            yes I do

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            • undefined
              dc42 administrators
              last edited by dc42 2 Apr 2020, 07:33 1 Feb 2020, 12:12

              Unfortunately, connecting a motor with the wires in wrong order does blow the driver sometimes. The reason is that the driver thinks it is applying a certain voltage to each phase, but in reality the voltages being applied are completely different. This results in very high peak currents. The short-circuit protection built into the driver, which RRF configures to maximum sensitivity, doesn't always kick in fast enough to protect the driver.

              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

              undefined 1 Reply Last reply 3 Feb 2020, 23:44 Reply Quote 0
              • undefined
                Redheadrambo @dc42
                last edited by 3 Feb 2020, 23:44

                @dc42 Damn. Can I use the E1 driver for the y-axis then?

                undefined 1 Reply Last reply 3 Feb 2020, 23:54 Reply Quote 0
                • ?
                  A Former User
                  last edited by 3 Feb 2020, 23:53

                  yeah, wiki should get you going with the config
                  https://duet3d.dozuki.com/Wiki/Gcode#Section_M584_Set_drive_mapping

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                  • undefined
                    droftarts administrators @Redheadrambo
                    last edited by 3 Feb 2020, 23:54

                    @Redheadrambo said in Smoked y driver on Duet 2 wifi after swapping out a motor.:

                    @dc42 Damn. Can I use the E1 driver for the y-axis then?

                    Yes. Set motor driver direction for E1 with M569 (copy from existing Y motor), then change M584 to use E1 on Y. eg if you had this before:

                    ; Drives
                    M569 P0 S1 ; physical drive 0 goes forwards (X)
                    M569 P1 S0 ; physical drive 1 goes backwards (Y)
                    M569 P2 S1 ; physical drive 2 goes forwards (Z)
                    M569 P3 S1 ; physical drive 3 goes forwards (E0)
                    M584 X0 Y1 Z2 E3 ; Set drive mapping

                    Change to

                    ; Drives
                    M569 P0 S1 ; physical drive 0 goes forwards (X)
                    ;M569 P1 S0 ; physical drive 1 goes backwards (Y) BROKEN!
                    M569 P2 S1 ; physical drive 2 goes forwards (Z)
                    M569 P3 S1 ; physical drive 3 goes forwards (E0)
                    M569 P4 S0 ; physical drive 4 goes backwards (E1, now Y)
                    M584 X0 Y4 Z2 E3 ; Set drive mapping

                    Ian

                    Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

                    undefined 1 Reply Last reply 4 Feb 2020, 00:05 Reply Quote 1
                    • undefined
                      Redheadrambo @droftarts
                      last edited by 4 Feb 2020, 00:05

                      @droftarts Hey thanks a bunch I'll swap it over when I get home and be WAY more careful with this one.

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