Hi all.

I have rewired everything. That was it. I had 105% belief in Duet that it’s not faulty. I do hope it fixed the issue for good and i think i know exact reason: me not puting everithing on a mount and due to using breakout boards not being fixed and cables constantly moved all over during “makeover”, it left those little hairs doing nasty business to thermistor cable (and maybe other places).
Everything looked ok for a freshly assembled proto-mod of chinese base machine, yet it is/was everything but a nice and tidy thing. The box is printing

As i redid the crimping, & replaced AC power switch, all is fine. I didn’t suspect the breakup board of vga cables to printheads early on..

How does it come to a state, when you can make testing, heating, moving etc, but it fails to operate on gcode?
And coincidentaly, couldnt it be a sort of check-up test?

i edited/deleted because i thought you won't get it

i'll call my coding brain friend and will share if anything comes out of this.

Thank you for a very constructive debate.

@Phaedrux as promissed, the pictures of a build in progress

https://ibb.co/9qDPTWn
https://ibb.co/CsGbTPb
https://ibb.co/6b5DQxL

It got pretty compact.
Needs a lot of work still to get the flat round cabling routed to both sides of X gantries from the bottom, then flat cables from there to each head, make breakout boards on toolheads for ribbon cables etc.
But all in all. There is progress

@droftarts yes. if i set it as it should be, then the U and A are swapped, so if i select T1, the T2 is moving and vice versa. The only thing i figured to do, to solve this, was to swap the X motor mapping for the tools.

it does work, it does the offset right, but... it's weird, because tools 1 and 2 need to be set wrong to work right.

oh yeah.... i almost forgot about my issue with this...
this is nice... *uck those motors. i can post readable config!!!

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
; by MaracMB
; General preferences
G90                                                         ; send absolute coordinates...
M83                                                         ; ...but relative extruder moves
M550 P"MarX-Quad"                                              ; set printer name

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

; Drives
M569 P0 S0                                              ; physical drive 0 goes backwards - X0 X
M569 P1 S1                                              ; physical drive 1 goes forwards - Z1
M569 P2 S1                                              ; physical drive 2 goes forwards - Y
M569 P3 S1 												; Physical drive 3 goes forwards - X2 A
M569 P4 S1 												; Physical drive 4 goes forwards - Z2
M569 P5 S1 												; Physical drive 5 goes forwards - X1 U
M569 P6 S1 												; Physical drive 6 goes forwards - X3 B
M569 P7 S0                                              ; physical drive 7 goes backwards - e1
M569 P8 S0                                              ; physical drive 8 goes backwards - e2
M569 P9 S0                                              ; physical drive 9 goes backwards - e3
M569 P10 S0                                             ; physical drive 10 goes backwards - e4

; Drive mapping
M584 X0 Y2 Z1:4 U5 A3 B6 E7:8:9:10  ; Drive mapping X=0, Y=2, Z=1 and 4, X2=U=5, X3=A=3, X4=B=6 and Z2=V=4,extruder motors 7,8,9,10. Drive 1 and 4 is combined Z.			
M584 V4 P6 								; Drive mapping Z2=V=4, 6 axes are visible
M350 X32 Y32 Z32 U32 A32 B32 V32 I1  	; Configure microstepping with interpolation
M350 E16:16:16:16 I0  	        	; Configure microstepping without interpolation

; Motion parameters
M92 X160.00 Y160.00 Z1600.00 U160.00 A160.00 B160.00 V1600.00 	; Set steps per mm
M92 E396.00:396.00:396.00:396.00								; Set steps per mm
M566 X420.00 Y420.00 Z15.00 U420.00 A420.00 B420.00 V15.00  	; set maximum instantaneous speed changes (mm/min)
M566 E320.00:320.00:320.00:320.00 								; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z1200.00 U12000.00 A12000.00 B12000.00 V1200.00 	; set maximum speeds (mm/min)
M203 E1200.00:1200.00:1200.00:1200.00            						; set maximum speeds (mm/min)
M201 X880.00 Y880.00 Z240.00 U880.00 A880.00 B880.00 V240.00 	; set accelerations (mm/s^2)
M201 E6400.00:6400.00:6400.00:6400.00                  		; set accelerations (mm/s^2)
M906 X950 Y1050 Z950 U950 A950 B950 V950 I30 	; set motor currents (mA) and motor idle factor in per cent
M906 E950:950:950:950 I30                          	; set motor currents (mA) and motor idle factor in per cent
M84 S30                                                     ; Set idle timeout
; Axis Limits
M208 X-170 Y-165 Z0 U-135 A-157 B-112 V0 S1 		; Set axis minima
M208 X115 Y155 Z350 U168 A112 B157 V350 S0 		; Set axis maxima
; Endstops
M574 X1 S1 P"!xstop" 					; configure active-low endstop for low end on X via pin Xstop
M574 Y1 S1 P"!zstop" 					; configure active-low endstop for low end on Y via pin Zstop
M574 Z1 S1 P"!ystop" 					; configure active-low endstop for low end on Z via pin Ystop
M574 U2 S1 P"!duex.e2stop" 					; configure active-low endstop for high end on X2 via pin duex.e2stop
M574 A1 S1 P"!e0stop" 				; configure active-low endstop for low end on X3 via pin e0stop
M574 B2 S1 P"!duex.e3stop" 				; configure active-low endstop for high end on X4 via pin duex.e3stop
M574 V1 S1 P"!e1stop" 					; configure active-low endstop for low end on Z2 via pin e1stop
; Z-Probe
;M558 P0 H5 F120 T6000 					; disable Z probe but set dive height, probe speed and travel speed
;M557 X-125:125 Y-125:125 S125 				; define mesh grid
; Heaters and sensors
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 	            ; configure sensor 0 as thermistor on pin bedtemp
M308 S1 P"duex.e2temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin duex.e2temp
M308 S2 P"duex.e3temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 2 as thermistor on pin duex.e3temp
M308 S3 P"duex.e4temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 3 as thermistor on pin duex.e4temp
M308 S4 P"duex.e5temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 4 as thermistor on pin duex.e5temp
M308 S5 Y"mcu-temp" A"MCU" 				    ; Configure sensor for MCU
M950 H0 C"bedheat" T0                                       ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00                                            ; disable bang-bang mode for the bed heater and set PWM limit
M143 H0 S100                                                ; set temperature limit for heater 0 to 120C
M140 H0                                                     ; map heated bed to heater 0
M950 H1 C"duex.e2heat" T1                                   ; create nozzle heater output on duex.e3heat and map it to sensor 1
M143 H1 S300                                                ; set temperature limit for heater 1 to 300C
M307 H1 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M950 H2 C"duex.e3heat" T2                                   ; create nozzle heater output on duex.e4heat and map it to sensor 2
M143 H2 S300                                                ; set temperature limit for heater 2 to 300C
M307 H2 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M950 H3 C"duex.e4heat" T3                                   ; create nozzle heater output on duex.e5heat and map it to sensor 3
M143 H3 S300                                                ; set temperature limit for heater 3 to 300C
M307 H3 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M950 H4 C"duex.e5heat" T4                                   ; create nozzle heater output on duex.e6heat and map it to sensor 4
M143 H4 S300                                                ; set temperature limit for heater 4 to 300C
M307 H4 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
; Fans
M950 F0 C"duex.fan4" Q1000                                  ; create fan 1 on pin duex.fan4 and set its frequency -- TOOL FAN 0
M106 P0 S0 H-1 	                                         	; set fan 1 value. Thermostatic control is turned off -- TOOL FAN 0
M950 F1 C"duex.fan5" Q1000                                   ; create fan 2 on pin duex.fan5 and set its frequency -- TOOL FAN 1
M106 P1 S0 H-1                                         		; set fan 2 value. Thermostatic control is turned off -- TOOL FAN 1
M950 F2 C"duex.fan6" Q1000                                   ; create fan 3 on pin duex.fan6 and set its frequency -- TOOL FAN 2
M106 P2 S0 H-1                                         		; set fan 3 value. Thermostatic control is turned off -- TOOL FAN 2
M950 F3 C"duex.fan7" Q1000                                   ; create fan 4 on pin duex.fan7 and set its frequency -- TOOL FAN 3
M106 P3 S0 H-1                                         		; set fan 4 value. Thermostatic control is turned off -- TOOL FAN 3

M950 F4 C"fan0" Q1000                                   ; create fan 5 on pin fan0 and set its frequency  -- HOTEND FAN tool 0
M106 P4 S0 H1 T45                                           ; set fan 5 value. Thermostatic control is turned on -- HOTEND FAN tool 0
M950 F5 C"fan1" Q1000                                   ; create fan 6 on pin fan1 and set its frequency -- HOTEND FAN tool 1
M106 P5 S0 H2 T45                                          ; set fan 6 value. Thermostatic control is turned on -- HOTEND FAN tool 1
M950 F6 C"fan2" Q1000                                   ; create fan 7 on pin fan2 and set its frequency -- HOTEND FAN tool 2
M106 P6 S0 H3 T45                                          ; set fan 7 value. Thermostatic control is turned on -- HOTEND FAN tool 2
M950 F7 C"duex.fan3" Q1000                                   ; create fan 3 on pin duex.fan3 and set its frequency -- HOTEND FAN tool 3
M106 P7 S0 H4 T45                                          ; set fan 3 value. Thermostatic control is turned on -- HOTEND FAN tool 3


;Extra fan ports
M950 F8 C"duex.fan8" Q500                                   ; create fan 8 on pin duex.fan8 and set its frequency -- HOTEND FAN tool 3
M106 P8 S0 B0.5 L0.3 H4 T45 C"extFan"                                         ; set fan 8 value. Thermostatic control is turned on -- HOTEND FAN tool 3

;M950 F4 c"allwayson" Q500			; Assign Fan 4 to onboard Fan1 Port
;M106 P4 L0.2 X1 B0.1 H3 T40:65		; Set fan 4 PWR fan. Turns on when MCU temperature hits 40C and full when the MCU temperature reaches 65C	
;M950 F5 C"duex.pwm" 			; create port for LEDs on pin duex.fan8
;M106 P5 S0 C"LIGHTS" 			; LED control

; Tools
M563 P0 S"FrontLeft" D0 H1 F0			; define tool 0
G10 P0 X0 Y0 Z0 U0 A0 B0					; set tool 0 axis offsets
G10 P0 R0 S0 								; set initial tool 0 active and standby temperatures to 0C
M563 P1 S"FrontRight" D1 H2 F1 X3  			; define tool 1, ports X axis to U - motor 5
G10 P1 X0 Y0 Z0 U0.44 A0 B0					; set tool 1 axis offsets
G10 P1 R0 S0 								; set initial tool 1 active and standby temperatures to 0C
M563 P2 S"BackLeft" D2 H3 F2 X5 			; define tool 3, ports X axis to A - motor 3
G10 P2 X0 Y161.7 Z0 U0 A0.40 B0				; set tool 2 axis offsets
G10 P2 R0 S0 								; set initial tool 1 active and standby temperatures to 0C
M563 P3 S"BackRight" D3 H4 F3 X6 			; define tool 3, ports X axis to A - motor 6
G10 P3 X0 Y175 Z0 U0 A0 B1.08 				; set tool 3 axis offsets
G10 P3 R0 S0  								; set initial tool 1 active and standby temperatures to 0C

; Automatic saving after power loss is enabled
M911 S23.00 R23.50 P"M913 X0 Y0 U0 V0 A0 B0 G91 M83 G1 Z3 E-5 F3000" ; Set voltage thresholds and actions to run on power loss
; Miscellaneous
M501                                                        ; load saved parameters from non-volatile memory

@droftarts thanks, but this makes no sense. The axes U, A, B work and do ok on their own. They did alright before i had some mishap. The config was the same, nothing other than numbering changed.

Also, if W counted, then everything else would just collapse. Now, i have to swap 3 and 5. These are not consequtive numbers. and i have to swap them within tools definitions.

So... still nothing.

At least offsets seem to work as set.

So.. i have another super weird issue regarding multiple X carriages.
I had a mishap, so i had to rewire stuff.

All the axes move as they should. Home as they should. But tools.... tools are one weird stuff.

I map the drives like so:

M584 X0 Y2 Z1:4 U5 V4 A3 B6 E7:8:9:10 ; Drive mapping X=0, Y=2, Z=1 and 4, X2=U=5, X3=A=3, X4=B=6 and Z2=V=4,extruder motors 7,8,9,10. Drive 1 and 4 is combined Z.

so this is:
X is front left, X drives motor 0
U is front right, X drives motor 5
A is back left, X drives motor 3
B is back right, X drives motor 6

But when i map the X drives to tools, i have to swap the
M563 P0 S"FrontLeft" D0 H1 F0
M563 P1 S"FrontRight" D1 H2 F1 X3
M563 P2 S"BackLeft" D2 H3 F2 X5
M563 P3 S"BackRight" D3 H4 F3 X6

For some weird reason, i have to switch the motor mapping of tools to work correctly. This will probably mess up my tool offsets and all.

I have no idea why this is.

Duet2, fw 3.2-beta2
DWC 3.2.0-beta2

@bearer exactly.

Duet3D, the best thing that happened to RepRap.

@dc42 thank you

@dc42 yes, it’s one at a time scenario. For extruders.
Ok, so only step and dir, ok. Even better

Edit the firmware to send signal through GPIO?

I thought of just adding muxing sequence in toolchange scripts...
Like

M84 E4
Dwell for like 500 ms
M42 P100 S1
M42 P101 S0
M42 P102 S0
M42 P103 S0

So this is not enough?
What would i need to change in firmware if that’s not ok?

Hello,
Can i MUX the En,Step and Dir pins for the external stepper driver ? I guess the breakout boards for stepper drivers would just share the operating 3.3v & GND and wouldn’t be muxed.
I know i have to disable idle current prior to switching...
I would like to do it with analog multiplexer and utilize the unused 100-103 GPIO pins on the Duex5 board for multiplexer control.

I would need only one (13.th) stepper motor, but since 4 GPIO pins can multiplex 16 channels, this might just open new possibilities for me 😉