Duet 3 mini5+ and Ender 3 Pro: "grinding" motors?



  • Installed my Duet 3 mini5+ board on my ender 3 pro this week. Followed the excellent guide, thanks Jason Znack!

    I fired up and all was well...it seemed. When I homed everything, the stepper motors sounded like they were grinding. I used the web interface to move around a little, and they still made the noise? Almost like they had sand in them, that sort of noise? They did not make this sound with the OEM creality board or two other aftermarket boards I have had installed on the printer in the past. This is suggesting to me that its the duet board, my config.g or my wiring (I followed the guide and simple cut off the guides rather than recrimping).

    Since I didnt see any smoke and they were still cool, I started a short 10 minute print. It printed overall pretty good, just the motors sounded like they were grinding away the entire time?

    Any ideas? Thanks!

    Below is my config.g file if that will help diagnose:

    ; Configuration file for Duet 3 Mini 5+ (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.2.2 on Mon Feb 15 2021 16:02:50 GMT-0700 (Mountain Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"E3P" ; set printer name
    M918 P1 E4 F2000000 ; configure direct-connect display

    ; Network
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M569 P0.0 S0 ; physical drive 0.0 goes backwards
    M569 P0.1 S0 ; physical drive 0.1 goes backwards
    M569 P0.2 S1 ; physical drive 0.2 goes forwards
    M569 P0.3 S0 ; physical drive 0.3 goes backwards
    M584 X0.0 Y0.1 Z0.2 E0.3 ; set drive mapping
    M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E93.00 ; set steps per mm
    M566 X900.00 Y900.00 Z60.00 E300.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z600.00 E3600.00 ; set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z200.00 E2500.00 ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E900 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 X235 Y235 Z260 S0 ; set axis maxima

    ; Endstops
    M574 X1 S1 P"io5.in" ; configure active-high endstop for low end on X via pin io5.in
    M574 Y1 S1 P"io6.in" ; configure active-high endstop for low end on Y via pin io6.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 X20:200 Y20:200 S20 ; define mesh grid

    ; Heaters
    M308 S0 P"temp0" Y"thermistor" T98801 B4185 ; configure sensor 0 as thermistor on pin temp0
    M950 H0 C"out0" T0 ; create bed heater output on out0 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 S80 ; set temperature limit for heater 0 to 80C
    M308 S1 P"temp1" Y"thermistor" T98801 B4185 ; configure sensor 1 as thermistor on pin temp1
    M950 H1 C"out1" T1 ; create nozzle heater output on out1 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

    ; Fans
    M950 F0 C"out3" Q500 ; create fan 0 on pin out3 and set its frequency
    M106 P0 C"PartCool" S0 H-1 ; set fan 0 name and value. Thermostatic control is turned off
    M950 F1 C"out4" Q500 ; create fan 1 on pin out4 and set its frequency
    M106 P1 C"HotEnd" S1 H1:0 T45 ; set fan 1 name and value. Thermostatic control is turned on
    M950 F2 C"out5" Q500 ; create fan 2 on pin out5 and set its frequency
    M106 P2 C"CaseFan" S1 H1:0 T45 ; set fan 2 name and value. Thermostatic control is turned on

    ; Tools
    M563 P0 S"HotEnd" D0 H1 F0 ; define tool 0
    G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
    G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

    ; Custom settings are not defined

    ; Miscellaneous
    M501 ; load saved parameters from non-volatile memory
    M911 S22 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
    T0 ; select first tool



  • Add D3 V40 for the X Y and Z motor M569 commands



  • Awesome, thanks, that seemed to fix it. I will have to look up exactly what that did so I'm educated, but it worked!


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