@Phaedrux Update: I tried M556 S100 X5 Y5 Z5 and there's a definite visible change, so I guess my changes were too conservative. I'll keep tuning. Thanks for the bump in the right direction.

@Phaedrux They're much larger than the (working) values for the other machines — what is a better value to try? X5 Y5? I want to test but don't want to break anything.

Hi, all. I purchased Vector3D's excellent Calilantern and have used it to tune most of my printers. I have four Duet-based machines: three Duet 3 Mini 5+ boards and one Duet 2 Wifi + DueX5 (Railcore).

On all three Duet 3 Mini 5+ machines, I was able to run the calibration file, fill out the spreadsheet to get the M556 adjustment, apply it, and observe an immediate improvement. The Duet 2 system seems to be categorically ignoring this value, and I'm out of ideas on what to look at.

I started with this system on 2.05 and have manually upgraded it all the way to 3.5.2 in the hopes that it would resolve this issue. I've tried putting in very silly values for M556, verifying that they're in place by running the bare M556, running a file, and verifying that the M556 is still in place after the file... but the printed file doesn't change. It's always roughly the same amount of 0.56mm off on a 100mm distance.

If you have any ideas on what could be causing this, please let me know. I'm also very happy to run tests and be wrong about things.

Config.g:

; Configuration file for RailcoreII 300ZL Series Printers
; updated for RRF3 on 2024-04-24

; Debugging
M111 S0                                 ; Debug off
M929 P"eventlog.txt" S1                 ; Start logging to file eventlog.txt
M550 P"RailCore"                        ; Machine name and Netbios name (can be anything you like)

; General preferences
M555 P2                                 ; Set output to look like Marlin
M575 P1 B57600 S1                       ; Comms parameters for PanelDue
G21                                     ; Work in millimetres
G90                                     ; Send absolute coordinates...
M83                                     ; ...but relative extruder moves

; Axis and motor configuration
M669 K1                                 ; CoreXY mode

; Drives
M584 X0 Y1 Z5:6:7 E3:4:8:9  ; Map Z to drivers 5, 6, 7. Define unused drivers 3,4,8 and 9 as extruders
M569 P0 S1                  ; Drive 0 goes forwards (change to S0 to reverse it)| X stepper
M569 P1 S0                  ; Drive 1 goes backwards(change to S1 to reverse it)| Y Stepper
M569 P2 S1                  ; Drive 2 goes forwards                             | Unused
M569 P3 S1                  ; Drive 3 goes forwards                             | Extruder S1 for Bondtech, S0 for Titan
M569 P4 S1                  ; Drive 4 goes forwards                             | Extruder (unused)
M569 P5 S0                  ; Drive 5 goes backwards                            | Front Left Z
M569 P6 S0                  ; Drive 6 goes backwards                            | Rear Left Z
M569 P7 S0                  ; Drive 7 goes backwards                            | Right Z

;Leadscrew locations
M671 X-10:-10:333 Y22.5:277.5:150 S7.5 ;Front left,(-10,22.5) Rear Left (-10.,227.5) , Right (333,160) S7.5 is the max correction - measure your own offsets, to the bolt for the yoke of each leadscrew

; Axis and motor configuration
M350 X16 Y16 Z16 E16 I1                 ; Set 16x microstepping for axes & extruder, with interpolation.
;M574 X1 Y1 Z0 S1                        ; Set homing switch configuration (x,y at min, z at max) IF YOU NEED TO REVERSE YOUR HOMING SWITCHES CHANGE S1 to S0
M574 X1 S1 P"xstop"
M574 Y1 S1 P"ystop"
M574 Z0 P"nil"

M906 X650 Y500 Z600 E500 I60            ; Motor currents (mA) - WARNING: Conservative - May trigger stallguard (and prematurely during homing) if sensorless.

; M201 X500 Y500 Z02 E500                 ; Accelerations (mm/s^2) - WARNING: Conservative
M201 X800 Y800 Z02 E500                 ; Accelerations (mm/s^2) - WARNING: Conservative

M203 X3000 Y3000 Z50 E1800              ; Maximum speeds (mm/min) - WARNING: Conservative

; M566 X200 Y200 Z5 E10                   ; Maximum jerk speeds mm/minute - WARNING: Conservative
M566 X400 Y400 Z5 E10                   ; Maximum jerk speeds mm/minute - WARNING: Conservative

M92 X200 Y200 Z1600                     ; Steps/mm for X.Y
M92 Z1600                               ; Steps/mm for Z - TR8*2 / 1.8 deg stepper or TR8*4 / 0.9 deg stepper
M92 E837                                ; Extruder - 0.9 deg/step (ProjectR3D kit with E3D stepper MT-1701HSM140AE or Standard Titan stepper 42BYGHM208P4.5-15-X2) 

; It doesn't seem to matter what the M906 command says -- the current never changes and stepper 6 overheats. This command fixes it, though
M913 X75 Y75 Z60 E65

; Set axis minima:maxima switch positions (Adjust to suit your machine and to make X=0 and Y=0 the edges of the bed)
; These values are conservative to start with, adjust during commissioning.
M208 X0:250 Y0:250 Z-0.2:230        ; Conservative 300ZL/T settings (or 250ZL)

; Thermistors
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 R4700          ; Bed thermistor
M308 S1 P"spi.cs1" Y"rtd-max31865" ; create sensor number 1 as a PT100 sensor in the first position on the Duet 2 daughterboard connector
;M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 R4700  ; Hotend thermistor
M308 S2 P"e1temp" Y"thermistor" T100000 B4725 C7.06e-8 R4700  ; Chamber thermistor

; old thermistor data
;M305 P0 S"Bed" T100000 B3950 R4700 H0 L0          ; BOM thermistor values. Put your own H and/or L values here to set the bed thermistor ADC correction
;M305 P1 S"E0" T100000 B4725 C7.06e-8 R4700 H0 L0  ; E3D Semitec 104GT2 thermistor values. Put your own H and/or L values here to set the first nozzle thermistor ADC correction
;M305 P2 S"Chamber" T100000 B4725 C7.06e-8 R4700 H0 L0 ; Heated Chamber

;Heaters
M950 H0 C"bedheat" T0    ; define bed heater
M140 H0                  ; map heated bed to heater 0
M950 H1 C"e0heat" T1     ; define hotend heater

M143 H0 S150                               ; Maximum H0 (Bed) heater temperature
M143 H1 S400                               ; Maximum H1 (Extruder) heater temperature (Revo HT hotside)
M140 S-273 R-273                           ; Standby and initial Temp for bed as "off" (-273 = "off")
M141 H2                                    ; Heated Chamber

M143 H1 P0 S390 A2 ; switch off heater 1 temporarily if it exceeds 390°C
M143 H1 P1 S400 A0 ; raise a heater fault if it exceeds 400C
; Default heater model
;M307 H0 A270.7 C90.4 D6.7 B0 S1.0          ; Default Bed Heater Parameters, before tuning / if config-override.g is missing
;M307 H1 A508.1 C249.0 D3.8 S1.00 V24.2 B0  ; Default Tool Heater Parameters, before tuning / if config-override.g is missing

M950 F0 C"fan0" ; define fan0
M950 F1 C"fan1" ; define fan1
M950 F2 C"fan2" ; define fan2


; M106 P1 T45 S0.7 H1:2
; Fans
M106 P0 H-1                             ; Disable thermostatic mode for fan 0
M106 P1 H-1                             ; Disable thermostatic mode for fan 1
M106 P2 H-1                             ; Disable thermostatic mode for fan 2
M106 P0 S0                              ; Turn off fans
M106 P1 S0
M106 P2 S0

; Tool definitions
M563 P0 D0 H1                           ; Define tool 0
G10 P0 S-273 R-273                      ; Set tool 0 operating and standby temperatures(-273 = "off")

; Z probe
M558 P9 H10 A1 T3000 S0.02 C"zprobe.in" ; Z probe - raise probe height.
					; H10 - dive height
					; A bigger dive height prevents a situation where the bed is out of alignment by more than the dive height
					; on any corner, which can crash the hot-end into the bed while moving the head in XY.
					; Probing speed and travel speed are similarly reduced in case the Z probe isn't connected properly (or
					; disconnects later after moving to a point) giving the user more time to stop.

;M556 S100 X0.1390 Y0.1990 Z0.2590       ; CaliLantern Skew Profile
;M556 S100 X-0.0990 Y-0.0600 Z000000     ; CaliLantern Skew Profile, try 2
;M556 S100 X-0.1190 Y0.0250 Z0.0000      ; CaliLantern Skew Profile, try 3
M556 S100 X1 Y1 Z0                      ; test skew value
M557 X50:200 Y50:200 S150 S150          ; Set Default Mesh (conservative)

M98 P"config-user.g"                    ; Load custom user config

M501                                    ; Load saved parameters from non-volatile memory

config-user.g:

;File     : config-user.g for the Project R3D Kit
;Effect   : Provides a custom configuration area for the Railcore user.
;Use-case : By keeping any custom definitions in this file (such as Z probe attributes, axis minima/maxima and anything else that you wish to override in config.g
;         : it will enable the user to easily keep track of their own changes to the default config, as well as provide a simple upgrade path for future Github releases.

; Z probe and compensation definition
; *** WARNING - **Always** make sure your cables are correct, secure and test them thoroughly before homing Z for the first times!
; INSTRUCTIONS :   1) Uncomment your configuration lines
;                  2) M558 *** Do not add the Fxxx parameter for M558 here, it is set in homez.g
;                  3) G31 configuration
;                   a) Customize your offsets appropriately, where the probe is X Y is offset from the nozzle.
;                   b) Z is the trigger height (how high your nozzle is from the bed when the probe triggers). You need to dial those in.
; c) Tip: A larger trigger height in G31 moves you CLOSER to the bed

; ** REMEMBER to place deployprobe.g and retractprobe.g from the bltouch directory into the /sys directory and read the README CAREFULLY.
M552 S1                             ;Turn Wifi on  
M558 P9 H5 A3 T6000 C"^zprobe.in" F500:50   ; Set 5mm dive height, 3 probes and 6000 travel speed.

;G31 X45.4 Y40.5 Z2.440 P25         ; BL-touch - Z Offset set to 0, determine your own Z-Offset and enter it here
                                    ; (Note: Positive number is closer to the bed)
G31 X45.4 Y40.5 Z1.8 P25
M574 Z0 P"nil"
M308 S2 P"e1temp" Y"thermistor" T100000 B4725 C7.06e-8 R4700  ; Chamber thermistor
M950 S0 C"duex.pwm1"                ; define heater 3 on the duex

;Lead Screw offset
M671 X-18:-18:331 Y-5:249:121 S7.5

; Axis and motor configuration - Faster speeds, so uncomment only when fully commissioned!
M906 X1300 Y1300 Z1800 E1030 I60    ; Set motor currents (mA) 2352 max
M203 X24000 Y24000 Z900 E7000
M201 X2500 Y2500 Z20 E3000
M566 X850 Y850 Z30 E600              ; Maximum jerk speeds mm/minute

; Drives
M569 P3 S0                          ; Project R3D : Drive 3 goes backwards - Extruder 

; Set axis minima:maxima switch positions (Adjust to suit your machine and to make X=0 and Y=0 the edges of the bed)
M208 X0:290 Y0:280 Z-0.2:330        ; 300ZL
M557 X45.4:330 Y45.4:310 S240 S240      ; Set Default Mesh - NOTE: take probe offset into account 
                                     ; E.G. If probe offset is 42 on Y, then Y50:290 will take the hotend to Y08 to Y248)
;Hemera settings
M92 X201.5 Y201.5 Z1600 E409

;Thermostatic Fan Control
M106 P1 T45 H1

; Tool definition
M563 P0 S"E3D Hemera" D0 H1         ; Define tool 0 uses extruder 0, heater 1 
G10 P0 X0 Y0 Z0                     ; Set tool 0 axis offsets
M143 H1 S400                        ; Maximum H1 (Extruder) heater temperature (Revo HT hotside installed)

;M98 P"wifi.g"                       ; Run WiFi configuration file , only run wifi.g UNTIL YOU ARE CONNECTED AND THEN DELETE.  
                                    ; As well as being a security hazard, writing the access point parameters to WiFi chip every
                                    ; time you start the Duet may eventually wear out the flash memory.

config-override.g:

; config-override.g file generated in response to M500 at 2024-07-18 14:53
; This is a system-generated file - do not edit
; Heater model parameters
M307 H0 R0.394 C773.300:773.300 D9.30 S1.00 V24.1 B0 I0
M307 H1 R2.761 C237.851:237.851 D6.80 S1.00 V24.2 B0 I0
; Workplace coordinates
G10 L2 P1 X0.00 Y0.00 Z0.00
G10 L2 P2 X0.00 Y0.00 Z0.00
G10 L2 P3 X0.00 Y0.00 Z0.00
G10 L2 P4 X0.00 Y0.00 Z0.00
G10 L2 P5 X0.00 Y0.00 Z0.00
G10 L2 P6 X0.00 Y0.00 Z0.00
G10 L2 P7 X0.00 Y0.00 Z0.00
G10 L2 P8 X0.00 Y0.00 Z0.00
G10 L2 P9 X0.00 Y0.00 Z0.00

Any advice is appreciated; thanks for your time!

@deckingman we're in the same boat then; everything seems to be happy now with the latest wire change, so I suppose I'll keep an eye on it and see what happens? The current temperatures look great and totally expected (with the exception of the mild curve on the rise):

Thanks a lot for taking a look and I'm sorry this isn't a more satisfying ending lol

Test print went perfectly. I'll run another longer one, and if that works I'll look at updating the firmware (though I definitely don't want to lol).

M307 H1
Heater 1 model: gain 853.7, time constant 199.1, dead time 1.6, max PWM 1.00, calibration voltage 24.2, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P25.8, I1.443, D29.1
Computed PID parameters for load change: P25.

and now it's rock solid. I'm so confused. Guess it's test print time?

@deckingman I just finished replacing the cable with a custom one and it makes it all the way to 220 in one go now and doesn't trigger the heater fault -- haven't changed anything else. Running a PID tune now, then will post the M307 results from the tune. Maybe this is just cable 'going bad' as opposed to breaking entirely. Two in a row though is weird.

@deckingman Oh crap, I'm sorry, reading comprehension failure on my part. Config override attached:

; config-override.g file generated in response to M500 at 2023-07-02 02:14
; This is a system-generated file - do not edit
; Heater model parameters
M307 H0 A304.4 C773.3 D9.3 S1.00 V24.1 B0
M307 H1 A812.0 C265.2 D0.6 S1.00 V24.2 B0
M307 H2 A340.0 C140.0 D5.5 S1.00 V0.0 B0
M307 H4 A340.0 C140.0 D5.5 S1.00 V0.0 B0
M307 H5 A340.0 C140.0 D5.5 S1.00 V0.0 B0
M307 H6 A340.0 C140.0 D5.5 S1.00 V0.0 B0
M307 H7 A340.0 C140.0 D5.5 S1.00 V0.0 B0
G10 L2 P1 X0.00 Y0.00 Z0.00
G10 L2 P2 X0.00 Y0.00 Z0.00
G10 L2 P3 X0.00 Y0.00 Z0.00
G10 L2 P4 X0.00 Y0.00 Z0.00
G10 L2 P5 X0.00 Y0.00 Z0.00
G10 L2 P6 X0.00 Y0.00 Z0.00
G10 L2 P7 X0.00 Y0.00 Z0.00
G10 L2 P8 X0.00 Y0.00 Z0.00
G10 L2 P9 X0.00 Y0.00 Z0.00

@deckingman Roger that.

M307 H1
Heater 1 model: gain 812.0, time constant 265.2, dead time 0.6, max PWM 1.00, calibration voltage 24.2, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P97.2, I7.703, D40.8
Computed PID parameters for load change: P97.

; Configuration file for RailcoreII 300ZL Series Printers
; Do NOT change this file. All customizations should occur in config-user.g

; Debugging
M111 S0                                 ; Debug off
M929 P"eventlog.txt" S1                 ; Start logging to file eventlog.txt
M550 P"RailCore"                        ; Machine name and Netbios name (can be anything you like)

M552 P0.0.0.0                           ; Use DHCP
M552 S1

; General preferences
M555 P2                                 ; Set output to look like Marlin
M575 P1 B57600 S1                       ; Comms parameters for PanelDue
G21                                     ; Work in millimetres
G90                                     ; Send absolute coordinates...
M83                                     ; ...but relative extruder moves

; Axis and motor configuration
M669 K1                                 ; CoreXY mode

; Drives
M584 X0 Y1 Z5:6:7 E3:4:8:9  ; Map Z to drivers 5, 6, 7. Define unused drivers 3,4,8 and 9 as extruders
M569 P0 S1                  ; Drive 0 goes forwards (change to S0 to reverse it)| X stepper
M569 P1 S0                  ; Drive 1 goes backwards(change to S1 to reverse it)| Y Stepper
M569 P2 S1                  ; Drive 2 goes forwards                             | Unused
M569 P3 S1                  ; Drive 3 goes forwards                             | Extruder S1 for Bondtech, S0 for Titan
M569 P4 S1                  ; Drive 4 goes forwards                             | Extruder (unused)
M569 P5 S0                  ; Drive 5 goes backwards                            | Front Left Z
M569 P6 S0                  ; Drive 6 goes backwards                            | Rear Left Z
M569 P7 S0                  ; Drive 7 goes backwards                            | Right Z

;Leadscrew locations
M671 X-10:-10:333 Y22.5:277.5:150 S7.5 ;Front left,(-10,22.5) Rear Left (-10.,227.5) , Right (333,160) S7.5 is the max correction - measure your own offsets, to the bolt for the yoke of each leadscrew

; Axis and motor configuration
M350 X16 Y16 Z16 E16 I1                 ; Set 16x microstepping for axes & extruder, with interpolation.
M574 X1 Y1 Z0 S1                        ; Set homing switch configuration (x,y at min, z at max) IF YOU NEED TO REVERSE YOUR HOMING SWITCHES CHANGE S1 to S0
M906 X650 Y500 Z600 E500 I60            ; Motor currents (mA) - WARNING: Conservative - May trigger stallguard (and prematurely during homing) if sensorless.

; M201 X500 Y500 Z02 E500                 ; Accelerations (mm/s^2) - WARNING: Conservative
M201 X800 Y800 Z02 E500                 ; Accelerations (mm/s^2) - WARNING: Conservative

M203 X3000 Y3000 Z50 E1800              ; Maximum speeds (mm/min) - WARNING: Conservative

; M566 X200 Y200 Z5 E10                   ; Maximum jerk speeds mm/minute - WARNING: Conservative
M566 X400 Y400 Z5 E10                   ; Maximum jerk speeds mm/minute - WARNING: Conservative

M92 X200 Y200 Z1600                     ; Steps/mm for X.Y
M92 Z1600                               ; Steps/mm for Z - TR8*2 / 1.8 deg stepper or TR8*4 / 0.9 deg stepper
M92 E837                                ; Extruder - 0.9 deg/step (ProjectR3D kit with E3D stepper MT-1701HSM140AE or Standard Titan stepper 42BYGHM208P4.5-15-X2) 

; It doesn't seem to matter what the M906 command says -- the current never changes and stepper 6 overheats. This command fixes it, though
M913 X75 Y75 Z60 E65

; Set axis minima:maxima switch positions (Adjust to suit your machine and to make X=0 and Y=0 the edges of the bed)
; These values are conservative to start with, adjust during commissioning.
M208 X0:250 Y0:250 Z-0.2:230        ; Conservative 300ZL/T settings (or 250ZL)

; Thermistors
M305 P0 S"Bed" T100000 B3950 R4700 H0 L0          ; BOM thermistor values. Put your own H and/or L values here to set the bed thermistor ADC correction
M305 P1 S"E0" T100000 B4725 C7.06e-8 R4700 H0 L0  ; E3D Semitec 104GT2 thermistor values. Put your own H and/or L values here to set the first nozzle thermistor ADC correction
M305 P2 S"Chamber" T100000 B4725 C7.06e-8 R4700 H0 L0 ; Heated Chamber

;Heaters
M570 S360                                  ; Print will be terminated if a heater fault is not reset within 360 minutes.
M143 H0 S80                                ; Maximum H0 (Bed) heater temperature (Conservative)
M143 H1 S230                               ; Maximum H1 (Extruder) heater temperature (Conservative and in case extruder has PTFE lining)
M140 S-273 R-273                           ; Standby and initial Temp for bed as "off" (-273 = "off")
M141 H2                                    ; Heated Chamber
; Default heater model
M307 H0 A270.7 C90.4 D6.7 B0 S1.0          ; Default Bed Heater Parameters, before tuning / if config-override.g is missing
M307 H1 A508.1 C249.0 D3.8 S1.00 V24.2 B0  ; Default Tool Heater Parameters, before tuning / if config-override.g is missing

; Fans
M106 P0 H-1                             ; Disable thermostatic mode for fan 0
M106 P1 H-1                             ; Disable thermostatic mode for fan 1
M106 P2 H-1                             ; Disable thermostatic mode for fan 2
M106 P0 S0                              ; Turn off fans
M106 P1 S0
M106 P2 S0
M106 P3 S0
M106 P4 S0
M106 P5 S0
M106 P6 S0
M106 P7 S0
M106 P8 S0

; Tool definitions
M563 P0 D0 H1                           ; Define tool 0
G10 P0 S-273 R-273                      ; Set tool 0 operating and standby temperatures(-273 = "off")

; Z probe
M558 H10 A1 T3000  S0.02                ; Z probe - raise probe height.
					; H10 - dive height
					; A bigger dive height prevents a situation where the bed is out of alignment by more than the dive height
					; on any corner, which can crash the hot-end into the bed while moving the head in XY.
					; Probing speed and travel speed are similarly reduced in case the Z probe isn't connected properly (or
					; disconnects later after moving to a point) giving the user more time to stop.

M557 X50:200 Y50:200 S150 S150          ; Set Default Mesh (conservative)

M98 P"config-user.g"                    ; Load custom user config

M501                                    ; Load saved parameters from non-volatile memory

I'm going to change out the wires again because I found another spare; though I don't think it'll fix it, it's worth trying

@deckingman It completed, then got farther than before in the heating. I requested 235 and it tapped out at around 225.