@alankilian config.json
Here's my config file; Only inconsistency I see is that the probe offset is set to 8mm, which isn't what it's configured to be. Other than that, it should be mostly right.

@gixxerfast I checked the cables by bridging the wires together and trying to turn the motor; That's how I checked if the wiring was right, because that was my first thought too. They're all wired up correctly.

@deckingman okay, thanks. That's very insightful. Yes, I did some google-fu, on how to add a second stepper for the Z-axis, and the answer was to simply add a second extruder to the configurator, then re-map it in the config file, which is probably how I ended up with double values for two extruders.

@alankilian I take it you're referring to the 1200:180 type of format?
The Reprap config tool made the numbers xxx:yyy, I didn't do that myself. Should I change it to be a single value, instead of two?

@engikeneer Yes, I checked the wiring. I used the cable for the extruder with the X axis - works the same as before. I also tried using a different stepper motor that is identical to the other motors for the extruder - also doesn't work. I tried using a different, known-good cable, also doesn't work.

These issues only happen on the extruder axis, what drive I set it to, or what hardware I use doesn't seem to matter.

I'm setting up a new printer, all the drives work, except for the Extruder. All it does is vibrate, not turning. I've swapped:

• Motors (to make sure the extruder wasn't broken)
• Cables (Also none broken)
• Drivers (Issue moves with different assigned driver)
  around, to amke sure nothing is borked in the hardware. Everything works, if I attach it to a different axis.

... So I came to the conclusion that I did something wrong in the Firmware. To get it out of the way, I'm a g-code noob, I configured this with the online tool, and only made some changes to the Z-axis, since I'm re-using a CR10 as the motion System. I've gone over it multiple times the past hour, and cannot figure out what I'm doing wrong, so I'm asking people that do know what they are doing.

The extruder is a Hemera Direct drive kit, (409 steps/mm, according to the spec sheet)

Here's my config, I hope that helps:

; Configuration file for Duet 3 (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Wed Dec 29 2021 10:35:39 GMT+0100 (Mitteleuropäische Normalzeit)

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"CR10"                           ; set printer name

; Network
M551 P"duetcr10"                               ; set password

M540 PBE-73-31-35-53-3F		       ; MAC Adress
M552 P192.168.27.7                           ; set static IP
M554 P192.168.27.1			       ; gateway
M553 P255.255.255.0			       ; netmask

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

M552 S1										   ; Enable Network

; Drives
M569 P0.0 S1                                   ; physical drive 0.0 goes forwards
M569 P0.1 S1                                   ; physical drive 0.1 goes forwards
M569 P0.2 S1                                   ; physical drive 0.2 goes forwards
M569 P0.3 S1                                   ; physical drive 0.3 goes forwards
M569 P0.4 S0                                   ; physical drive 0.4 goes forwards
M584 X0 Y1 Z2:4 E3                        ; set drive mapping      old-> M584 X0.0 Y0.1 Z0.2 E0.3:0.4
M671 X-20:320 Y0:0 S1.0		   ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
M350 X16 Y16 Z16 E16:16 I1                     ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E409.00:409.00       ; set steps per mm
M566 X900.00 Y900.00 Z100.00 E120.00:60.00      ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z500.00 E1200.00:180.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z30.00 E250.00:20.00      ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1200:1200 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 X300 Y300 Z400 S0                         ; set axis maxima

; Endstops
M574 X1 S1 P"io0.in"                           ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io0.in
M574 Y2 S1 P"io1.in"                           ; configure switch-type (e.g. microswitch) endstop for high end on Y via pin io1.in
M574 Z2 S2                                     ; configure Z-probe endstop for high end on Z


; Z-Probe
M558 P5 C"^io3.in" H5 F120 T6000 			   ;Removed the !
G31 P500 X50 Y0 Z2.5                           ; set Z probe trigger value, offset and trigger height
M557 X50:285 Y15:285 S20                       ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138   ; 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 B1 S1.00                               ; enable 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"temp1" Y"thermistor" T100000 B4138   ; 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 S280                                   ; set temperature limit for heater 1 to 280C

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

; Tools
M563 P0 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

I hope someone can spot what's wrong here (I sure can't, unfortunately), so thank you in advance, and happy printing.