Stepper Driver Blown



  • Dear Duet3D Team,
    we recently bought a Duet 2 WiFi and connected it to our Ender 3 V2 in order to upgrade it to dual extrusion. Everything worked fine except the stepper motor driver E1 which blew up immediately after addressing it (see picture below).
    IMG_0230.JPG
    The second stepper motor we used is the same type as the one that came with the Ender. We checked both stepper motor and wires after the incident and couldn't detect an issue.
    We used the RepRap Firmware Configuration Tool to update the config.g file for two extruders as shown below.

    ; Drives
    M569 P0 S0                                         ; physical drive 0 goes backwards
    M569 P1 S0                                         ; physical drive 1 goes backwards
    M569 P2 S1                                         ; physical drive 2 goes forwards
    M569 P3 S0                                         ; physical drive 3 goes backwards
    M569 P4 S0                                         ; physical drive 4 goes backwards
    M584 X0 Y1 Z2 E3:4                                 ; set drive mapping
    M350 E128:128 I0                                   ; configure microstepping without interpolation
    M350 X16 Y16 Z16 I1                                ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E93.00:93.00             ; set steps per mm
    M566 X600.00 Y600.00 Z60.00 E300.00:300.00         ; set maximum instantaneous speed changes (mm/min)
    M203 X9000.00 Y9000.00 Z600.00 E6000.00:6000.00    ; set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z120.00 E5000.00:5000.00      ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E900:900 I30                   ; set motor currents (mA) and motor idle factor in per cent
    M84 S30                                            ; Set idle timeout
    

    We are unable to detect the fault ourselves and are hoping to get some insights here.
    Thanks in advance!



  • There is a hole in the chip, the only additional information would come from the output of M122 and errors on the usb/web interface like short to ground on driver 4 or similar when trying to move the driver



  • Yes, we would see a short-to-ground error in the web interface after the driver failed



  • I purchased the board via filafarm on November 2nd, would this be applicable for replacement under warranty?



  • I'm sure Phaedrux or one of the others will be along shortly to approve a warranty replacement after verifying the fault isn't the motor or wiring as the board is still under the 6 month warranty and purchased from an authorized reseller.

    Maybe elaborate on how you tested the wiring and motor while you wait?



  • Thank you very much bearer! We measured the resistance of both components


  • Moderator

    It appears you may have suffered infant mortality on that driver. Please contact Filafarm and initiate a warranty exchange. Include a link to this thread as authorization.

    Do be sure to double check and identify your motor phases and wiring crimps etc before trying the new board.

    https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motors#Section_Identifying_the_stepper_motor_phases



  • @Phaedrux
    I will do that! Thank you!


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