Motor Phase A/B Disconnected on Driver 5



  • New Mainboard 6HC replacing a standard old cartesian FDM board. Before printing I verified every stepper connection and tested individual motor movement and it all seemed fine. During my first calibration print though, the error "Motor Phase A/B disconnected on driver 5" popped up before the 15A fuse triggered. I replaced the fuse and everything seems fine, except the same error is still there when I try to test stepper driver 5 (an extruder motor)

    I've tested the original motor and wire on another driver and it works fine. I've tested a different motor of the same model as well as a different connector on driver 5 and get the same error so I have ruled out my motor and wire connector.

    As a temporary fix I've just swapped the extruder on stepper driver 5 with the extruder on driver 4. Seems to work just fine, no errors so far.

    I suspect the driver 5 might have been damaged during that first print, but I would like to see if there is anything I can test other than hardware just in case I am making some error.



  • My config.g

    ; Configuration file for Duet 3 (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.2.2 on Mon Jan 25 2021 18:27:38 GMT-0500 (Eastern Standard Time)
    
    ; General preferences
    G90                                               ; send absolute coordinates...
    M83                                               ; ...but relative extruder moves
    M550 P"Duet 3"                                    ; set printer name
    
    ; Drives
    M569 P0.0 S1                                      ; physical drive 0.0 goes forwards
    M569 P0.1 S0                                      ; physical drive 0.1 goes forwards
    M569 P0.2 S0                                      ; physical drive 0.2 goes forwards
    M569 P0.3 S0                                      ; physical drive 0.3 goes forwards
    M569 P0.4 S0                                      ; physical drive 0.4 goes forwards
    M569 P0.5 S0                                      ; physical drive 0.5 goes forwards
    M584 X0.0 Y0.1 Z2:3 E0.4:0.5                     ; set drive mapping
    M350 X16 Y16 Z16 E16:16 I1                        ; configure microstepping with interpolation
    M92 X98.52 Y99 Z1573.00 E49.38:49.38           ; set steps per mm
    M566 X900.00 Y900.00 Z60.00 E120.00:120.00        ; set maximum instantaneous speed changes (mm/min)
    M203 X30000.00 Y30000.00 Z240.00 E1500.00:1500.00 ; set maximum speeds (mm/min)
    M201 X800.00 Y600.00 Z100.00 E10000.00:10000.00   ; set accelerations (mm/s^2)
    M906 X1330 Y1680 Z1680 E1330:1330 I30             ; set motor currents (mA) and motor idle factor in per cent
    M84 S30                                           ; Set idle timeout
    
    ; Axis Limits
    M208 X0 Y0 Z0 S1                                  ; set axis minima
    M208 X254 Y254 Z254 S0                            ; set axis maxima
    
    ; Endstops
    M574 X1 S1 P"!io0.in"                              ; configure active-high endstop for low end on X via pin io0.in
    M574 Y1 S1 P"!io1.in"                              ; configure active-high endstop for low end on Y via pin io1.in
    M574 Z1 S1 P"!io2.in"                              ; configure active-high endstop for low end on Z via pin io2.in
    
    ; Z-Probe
    M558 P0 H5 F120 T6000                             ; disable Z probe but set dive height, probe speed and travel speed
    M557 X15:215 Y15:195 S20                          ; define mesh grid
    
    ; Heaters
    M308 S0 P"temp1" Y"thermistor" T100000 B4138      ; configure sensor 0 as thermistor on pin temp1
    M950 H0 C"out1" T0                                ; create bed heater output on out1 and map it to sensor 0
    M307 H0 B0 S1.00                                  ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0                                           ; map heated bed to heater 0
    M143 H0 S120                                      ; set temperature limit for heater 0 to 120C
    M308 S1 P"temp2" Y"thermistor" T100000 B4138      ; configure sensor 1 as thermistor on pin temp2
    M950 H1 C"out2" T1                                ; create nozzle heater output on out2 and map it to sensor 1
    M307 H1 B0 S1.00                                  ; disable bang-bang mode for heater  and set PWM limit
    M143 H1 S250                                      ; set temperature limit for heater 1 to 250C
    M308 S2 P"temp3" Y"thermistor" T100000 B4138      ; configure sensor 2 as thermistor on pin temp3
    M950 H2 C"out3" T2                                ; create nozzle heater output on out3 and map it to sensor 2
    M307 H2 B0 S1.00                                  ; disable bang-bang mode for heater  and set PWM limit
    M143 H2 S250                                      ; set temperature limit for heater 2 to 250C
    
    ; Fans
    M950 F0 C"out8" Q500                              ; create fan 0 on pin out8 and set its frequency
    M106 P0 S1 H-1                                    ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"out9" Q500                              ; create fan 1 on pin out9 and set its frequency
    M106 P1 S1 H-1                                    ; set fan 1 value. Thermostatic control is turned off
    M950 F2 C"out6" Q500                              ; create fan 2 on pin out6 and set its frequency
    M106 P2 S0 H-1                                    ; set fan 2 value. Thermostatic control is turned off
    M950 F3 C"out7" Q500                              ; create fan 3 on pin out7 and set its frequency
    M106 P3 S0 H-1                                    ; set fan 3 value. Thermostatic control is turned off
    
    ; Tools
    M563 P1 S"Big" D0 H1 F2                           ; define tool 0
    G10 P1 X0 Y0 Z0                                   ; set tool 0 axis offsets
    G10 P1 R0 S0                                      ; set initial tool 0 active and standby temperatures to 0C
    M563 P0 S"Small" D1 H2 F3                                  ; define tool 1
    G10 P0 X59.5 Y0 Z0                                ; set tool 1 axis offsets
    G10 P0 R0 S0                                      ; set initial tool 1 active and standby temperatures to 0C
    
    ; Custom settings are not defined
    
    ; Miscellaneous 
    M501                                              ; load saved parameters from non-volatile memory
    
    
    

    Extruder Motor(s) Specifications
    Rigidbot.PNG

    M913 and M906 output:

    2/15/2021, 4:18:38 PM	m913
    Motor current % of normal - X:100, Y:100, Z:100, E:100:100
    2/15/2021, 4:18:22 PM	m906
    Motor current (mA) - X:1330, Y:1680, Z:1680, E:1330:1330, idle factor 30%
    

  • Moderator

    I'm surprised the fuse blew as well. Are you sure you don't have a short somewhere?

    When and where did you purchase the duet3?

    Can you post some clear photos of the board?



  • I tossed the fuse away after putting in a new one, but the internal metal piece was in 2 pieces after the sudden shutdown. If it is a short, it doesn't seem to be in my motor or my connectors since they all work fine on the other drivers.

    The board was purchased from Filastruder on 01/19/2021.

    Board:
    20210217_141123.jpg



  • the crimp jobs on your motor connectors seem bad.

    the end part should hold the outside of the cable.

    do you have a proper crimping tool?



  • @Veti I used this: https://www.amazon.com/gp/product/B00004SBDI

    This was my first project that required crimping and I followed some random video tutorials. I'll definitely redo all the connectors at some point. The other 5 drivers work just fine and I've swapped around all of the connections though, so it doesn't seem like my poor craftsmanship is the culprit.


  • administrators

    to agree with @Veti on this one there are a few points where it looks possible from the phot posted that wire pairs on the motors could actually touch on the connector:

    3b334d98-1e00-4b10-90fe-5d3eaead3122-image.png

    It not definitely that that caused the problem, especially if the 15A fuse blew as well as just popping the stepper driver MOSFETs, however I would fix that before powering your motors further.




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