@phaedrux @fcwilt Thanks for the M140 P comment I have added this to the code, and made the other described changes it should be up to date.

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Wed Jun 23 2021 23:47:21 GMT-0400 (Eastern Daylight Time)

; General preferences
G90                                             ; send absolute coordinates...
M83                                             ; ...but relative extruder moves
M550 P"Duet 3"                                  ; set printer name
M669 K1                                         ; select CoreXY mode

; 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 S1									; physical drive 0.4 goes forwards
M569 P0.5 S1									; physical drive 0.5 goes forwards                                			
M569 P1.1 S1                                    ; physical drive 1.1 goes forwards
M569 P1.2 S1                                    ; physical drive 1.2 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4:0.5 E1.1:1.2        ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X40.00 Y40.00 Z400.00 E420.00:420.00        ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00:120.00      ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z120.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z10.00 E250.00:250.00      ; set accelerations (mm/s^2)
M906 X1500 Y1500 Z1500 E800:800 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 X600 Y540 Z496 S0                          ; set axis maxima

; Endstops
M574 X1 S1 P"!io4.in"                           ; configure active-low endstop for low end on X via pin !io1.in
M574 Y1 S1 P"!io5.in"                           ; configure active-low endstop for low end on Y via pin !io5.in
M574 Z2 S1 P"!io3.in"                           ; configure active-low endstop for low end on Z via pin !io3.in

; Z-Probe
M950 S0 C"io7.out"                              ; create servo pin 0 for BLTouch
M558 P9 C"^io7.in" H7 F120 T6000                ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z1.67                            ; set Z probe trigger value, offset and trigger height
M557 X10:600 Y10:540 S100                        ; define mesh grid

; Heaters

M308 S0 P"1.temp0" Y"thermistor" T100000 B4138  ; configure sensor 0 as thermistor on expansion board pin 1.temp0
M950 H0 C"1.out0" T0                            ; create nozzle heater output on 1.out0 and map it to sensor 0
M307 H0 B0 S1.00                                ; disable bang-bang mode for heater  and set PWM limit
M143 H0 S280                                    ; set temperature limit for heater 0 to 280C
M308 S1 P"1.temp1" Y"thermistor" T100000 B4138  ; configure sensor 2 as thermistor on expansion board pin 1.temp1
M950 H1 C"1.out1" T1                            ; create nozzle heater output on 1.out2 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

; bed heater0
M308 S2 P"0.temp0" Y"thermistor" T100000 B4138    ; configure sensor 2 as thermistor on mainboard pin temp0
M950 H2 C"0.out9" T2                            ; create bed heater output on 1.out0 and map it to sensor 2
M140 P0 H2                                         ;assign H2 to bed heater0
M307 H2 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H2 S120                                     ;set temperature limit for heater 0 to 120C 

; bed heater1
M308 S3 P"0.temp1" Y"thermistor" T100000 B4138    ; configure sensor 3 as thermistor on mainboard pin temp1
M950 H3 C"0.out6" T3                             ; create bed heater output on 1.out0 and map it to sensor 3
M140 P1 H3                                         ;assign H2 to bed heater0
M307 H3 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H3 S120                                     ;set temperature limit for heater 0 to 120C

; bed heater2
M308 S4 P"0.temp2" Y"thermistor" T100000 B4138    ; configure sensor 4 as thermistor on mainboard pin temp2
M950 H4 C"0.out5" T4                             ; create bed heater output on 1.out0 and map it to sensor 4
M140 P2 H4                                          ;assign H2 to bed heater0
M307 H4 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H4 S120                                     ;set temperature limit for heater 0 to 120C

; bed heater3
M308 S5 P"0.temp3" Y"thermistor" T100000 B4138    ; configure sensor 5 as thermistor on mainboard pin temp3
M950 H5 C"0.out4" T5                             ; create bed heater output on 1.out0 and map it to sensor 5
M140 P3 H5                                      ;assign H2 to bed heater0
M307 H5 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H5 S120                                     ;set temperature limit for heater 0 to 120C



; Fans
M950 F0 C"1.out7" Q500                          ; create fan 0 on pin 1.out7 and set its frequency
M106 P0 S0 H-1                                  ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"1.out8" Q500                          ; create fan 1 on pin 1.out8 and set its frequency
M106 P1 S1 H-1                                  ; set fan 1 value. Thermostatic control is turned off

; Tools
M563 P0 D0 H0 F0                                ; define tool 0
G10 P0 X23.9 Y-28.21 Z0                          ; set tool 0 axis offsets
G10 P0 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H1 F1                                ; define tool 1
G10 P1 X-23.9 Y-28.21 Z0                         ; set tool 1 axis offsets
G10 P1 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
M575 P1 S1 B57600                               ; enable support for PanelDue

@fcwilt
Yea each stepper has its own driver all of the drivers are tied to the z axis in the config file.

I think the auto bed leveling is exactly what I am looking for, but I just need to do some reading to understand how to do this with my set-up.

@dc42 The cable did the trick sir. Thank you for your advice!

@deckingman thank you very much for this info. Especially the M584 comment, I had this all messed up. And in my head I was wondering how the code was tying heater to its respective extrusion drive. So this comment answers this question for me, it is in the tool definition. @Phaedrux thank you for the guidance you were correct I had not added the expansion board in the config tool. After doing this I was able to see the format that you displayed in your answer. I am posting my updated config.g file below.

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Wed Jun 23 2021 23:47:21 GMT-0400 (Eastern Daylight Time)

; General preferences
G90                                             ; send absolute coordinates...
M83                                             ; ...but relative extruder moves
M550 P"Duet 3"                                  ; set printer name
M669 K1                                         ; select CoreXY mode

; 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 S1									; physical drive 0.4 goes forwards
M569 P0.5 S1									; physical drive 0.5 goes forwards                                			
M569 P1.1 S1                                    ; physical drive 1.1 goes forwards
M569 P1.2 S1                                    ; physical drive 1.2 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4:0.5 E1.1:1.2        ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X40.00 Y40.00 Z400.00 E420.00:420.00        ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00:120.00      ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z120.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z10.00 E250.00:250.00      ; set accelerations (mm/s^2)
M906 X1500 Y1500 Z1500 E800:800 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 X600 Y540 Z496 S0                          ; set axis maxima

; Endstops
M574 X1 S1 P"!io4.in"                           ; configure active-low endstop for low end on X via pin !io1.in
M574 Y1 S1 P"!io5.in"                           ; configure active-low endstop for low end on Y via pin !io5.in
M574 Z2 S1 P"!io3.in"                           ; configure active-low endstop for low end on Z via pin !io3.in

; Z-Probe
M950 S0 C"io7.out"                              ; create servo pin 0 for BLTouch
M558 P9 C"^io7.in" H7 F120 T6000                ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z1.67                            ; set Z probe trigger value, offset and trigger height
M557 X10:600 Y10:540 S100                        ; define mesh grid

; Heaters

M308 S0 P"1.temp0" Y"thermistor" T100000 B4138  ; configure sensor 0 as thermistor on expansion board pin 1.temp0
M950 H0 C"1.out0" T0                            ; create nozzle heater output on 1.out0 and map it to sensor 0
M307 H0 B0 S1.00                                ; disable bang-bang mode for heater  and set PWM limit
M143 H0 S280                                    ; set temperature limit for heater 0 to 280C
M308 S1 P"1.temp1" Y"thermistor" T100000 B4138  ; configure sensor 2 as thermistor on expansion board pin 1.temp1
M950 H1 C"1.out1" T1                            ; create nozzle heater output on 1.out2 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

; bed heater0
M308 S2 P"0.temp0" Y"thermistor" T100000 B4138    ; configure sensor 2 as thermistor on mainboard pin temp0
M950 H2 C"0.out9" T2                            ; create bed heater output on 1.out0 and map it to sensor 2
M140 P0 H2                                         ;assign H2 to bed heater0
M307 H2 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H2 S120                                     ;set temperature limit for heater 0 to 120C 

; bed heater1
M308 S3 P"0.temp1" Y"thermistor" T100000 B4138    ; configure sensor 3 as thermistor on mainboard pin temp1
M950 H3 C"0.out6" T3                             ; create bed heater output on 1.out0 and map it to sensor 3
M140 P1 H3                                         ;assign H2 to bed heater0
M307 H3 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H3 S120                                     ;set temperature limit for heater 0 to 120C

; bed heater2
M308 S4 P"0.temp2" Y"thermistor" T100000 B4138    ; configure sensor 4 as thermistor on mainboard pin temp2
M950 H4 C"0.out5" T4                             ; create bed heater output on 1.out0 and map it to sensor 4
M140 P2 H4                                          ;assign H2 to bed heater0
M307 H4 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H4 S120                                     ;set temperature limit for heater 0 to 120C

; bed heater3
M308 S5 P"0.temp3" Y"thermistor" T100000 B4138    ; configure sensor 5 as thermistor on mainboard pin temp3
M950 H5 C"0.out4" T5                             ; create bed heater output on 1.out0 and map it to sensor 5
M140 P3 H5                                      ;assign H2 to bed heater0
M307 H5 B0 S10.00                                ; disable bang-bang mode for the bed heater and set PWM limit
M143 H5 S120                                     ;set temperature limit for heater 0 to 120C



; Fans
M950 F0 C"1.out7" Q500                          ; create fan 0 on pin 1.out7 and set its frequency
M106 P0 S0 H-1                                  ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"1.out8" Q500                          ; create fan 1 on pin 1.out8 and set its frequency
M106 P1 S1 H-1                                  ; set fan 1 value. Thermostatic control is turned off

; Tools
M563 P0 D0 H0 F0                                ; define tool 0
G10 P0 X23.9 Y-28.21 Z0                          ; set tool 0 axis offsets
G10 P0 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H1 F1                                ; define tool 1
G10 P1 X-23.9 Y-28.21 Z0                         ; set tool 1 axis offsets
G10 P1 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
M575 P1 S1 B57600                               ; enable support for PanelDue

@fcwilt alright perfect so I am doing the homing and then moving the hot end 10mm and setting the absolute x position to 10mm.

This is slightly more difficult and specific to my printer version question, but since I have a dual extruder head. And my positions are relative to the BL touch, which has a nozzle on either side of it in the x direction say +25mm and -25mm. When I do the homing and move 10mm in the x direction, technically only one of my hotends will be above 10mm the other will be out of the specified limits. Will this create any problems, assuming that I compensate for offsets in the tool definition like below?

; Tools
M563 P0 D0 H0 F0                                ; define tool 0
G10 P0 X23.9 Y-28.21 Z0                          ; set tool 0 axis offsets
G10 P0 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H1 F1                                ; define tool 1
G10 P1 X-23.9 Y-28.21 Z0                         ; set tool 1 axis offsets
G10 P1 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C

@fcwilt thanks for the reply. If I make the change to X10:590 what would I do when I home the x-axis? Because once I home the axis I am at 0 and won't be able to move the print head around. Should I get it to move 10mm after homing?

I am trying to figure out how to configure my print bed area versus my hot-end movable area. For example I configure the limits for moving my hot-end using M208:

; Axis Limits
M208 X0 Y0 Z0 S1                              ; set axis minima
M208 X600 Y540 Z496 S0                          ; set axis maxima

but how would I say that my print bed actually ranges from X10 to 590?

@fcwilt
Yea each stepper has its own driver all of the drivers are tied to the z axis in the config file.

I think the auto bed leveling is exactly what I am looking for, but I just need to do some reading to understand how to do this with my set-up.

@fcwilt

Usually I level the print bed by tightening the screws on the 4 corners of the bed, but the steppers are also on the 4 corners of the machine and they lift the frame which the bed sits on (coreXY). I am seeing that the although the bed is leveled on its frame, if the frame is unleveled I will have an unlevel print surface.

This happens because I have a coreXY which moves the bed frame from the ground up the z axis to the hotend. But each z stepper starts from its own ground and moves up, and if the 4 grounds aren't precisely the same I will have an unlevel print surface.

If I were able to command individual z steppers to move I could level my print surface once the bed moves into print position and correct for this unlevel bed frame.
pic 1 is resting condition.

pic2 is printing condition

I have 4 steppers on my z axis and I am looking for a command to instruct one of them to move x millimeters.

Normally I use G1 H2 Z(increment) but this will move all 4 of my steppers which is undesired. How can I move just one?

Below I pasted the portion of the config file that is for drives just in case it helps.

; 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 S1									; physical drive 0.4 goes forwards
M569 P0.5 S1									; physical drive 0.5 goes forwards                                			
M569 P1.1 S1                                    ; physical drive 1.1 goes forwards
M569 P1.2 S1                                    ; physical drive 1.2 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4:0.5 E1.1:1.2        ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X40.00 Y40.00 Z400.00 E837.00:837.00        ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00:120.00      ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z120.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z10.00 E250.00:250.00      ; set accelerations (mm/s^2)
M906 X1500 Y1500 Z1500 E800:800 I30             ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                         ; Set idle timeout

@phaedrux I did this last month I remember. But I don't think I flashed it to the expansion board. Because I ran the M997 B1 and reset the board. Now I can see all 6 temperatures!

So the mainboard does appear to be connecting to the expansion board.

@phaedrux said in Firmware for hotend of dual extruder head:

M122

M122

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.3 (2021-06-15 21:45:47) running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956L2-G43S8-6J9DJ-3SJ6N-980QG
Used output buffers: 1 of 40 (13 max)
=== RTOS ===
Static ram: 150904
Dynamic ram: 62680 of which 88 recycled
Never used RAM 140520, free system stack 200 words
Tasks: SBC(ready,5.3%,328) HEAT(delaying,0.0%,325) Move(notifyWait,0.0%,352) CanReceiv(notifyWait,0.0%,799) CanSender(notifyWait,0.0%,374) CanClock(delaying,0.0%,339) TMC(notifyWait,7.1%,93) MAIN(running,87.5%,922) IDLE(ready,0.0%,29), total 100.0%
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:04:48 ago, cause: power up
Last software reset at 2021-08-30 20:54, reason: User, none spinning, available RAM 140812, slot 0
Software reset code 0x0012 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0044a000 BFAR 0x00000000 SP 0x00000000 Task SBC Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 182
MCU temperature: min 29.3, current 43.8, max 43.9
Supply voltage: min 23.7, current 23.7, max 23.8, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 11.9, current 12.0, max 12.0, under voltage events: 0
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Driver 0: position 0, standstill, reads 35775, writes 14 timeouts 0, SG min/max 0/0
Driver 1: position 0, standstill, reads 35776, writes 14 timeouts 0, SG min/max 0/0
Driver 2: position 0, standstill, reads 35776, writes 14 timeouts 0, SG min/max 0/0
Driver 3: position 0, standstill, reads 35776, writes 14 timeouts 0, SG min/max 0/0
Driver 4: position 0, standstill, reads 35776, writes 14 timeouts 0, SG min/max 0/0
Driver 5: position 0, standstill, reads 35776, writes 14 timeouts 0, SG min/max 0/0
Date/time: 2021-08-31 18:07:31
Slowest loop: 0.45ms; fastest: 0.04ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 2 3 4 5 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP* is doing "M122" in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger* is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== CAN ===
Messages queued 2509, received 2110, lost 0, longest wait 2ms for reply type 6049, peak Tx sync delay 248, free buffers 49 (min 48), ts 1442/1441/0
Tx timeouts 0,0,0,0,0,0
=== SBC interface ===
State: 4, failed transfers: 1, checksum errors: 0
Last transfer: 1ms ago
RX/TX seq numbers: 9187/9187
SPI underruns 0, overruns 0
Disconnects: 0, timeouts: 0, IAP RAM available 0x2c818
Buffer RX/TX: 0/0-0
=== Duet Control Server ===
Duet Control Server v3.3.0
Code buffer space: 4096
Configured SPI speed: 8000000Hz
Full transfers per second: 0.14, max wait times: 13.0ms/0.0ms
Codes per second: 0.00
Maximum length of RX/TX data transfers: 3159/836

M122 B1

M122 B1
Diagnostics for board 1:
Board EXP3HC firmware 3.1.0 (2020-05-15b1)
Never used RAM 163.1Kb, max stack 320b
HEAT 1072 CanAsync 1452 CanRecv 1388 TMC 156 AIN 524 MAIN 2184
Last reset 00:06:12 ago, cause: power up
Driver 0: standstill, reads 64061, writes 11 timeouts 0, SG min/max 0/0
Driver 1: standstill, reads 64063, writes 11 timeouts 0, SG min/max 0/0
Driver 2: standstill, reads 64065, writes 11 timeouts 0, SG min/max 0/0
Moves scheduled 0, completed 0, hiccups 0
VIN: 24.0V, V12: 12.2V
MCU temperature: min 43.6C, current 43.8C, max 43.8C
Ticks since heat task active 42, ADC conversions started 372036, completed 372036, timed out 0
Last sensors broadcast 00000000 found 0 45 ticks ago
Free CAN buffers: 36
NVM user row de9a9239 aeecffb1 ffffffff ffffffff

@feynman137 also wanted to add that if I switch the bed heaters to reading a thermistor from the expansion board instead of the mainboard I will no longer be able to get their temperature either. So the errors must be related to the expansion board. I can get the H0 to display a temperature if I list a mainboard thermistor so it likely isn't something related to the H0 config