I have a DUET 3 Mainboard 6XD, it was working fine with YAT which means that I was able to send G-Codes from YAT Serial Terminal, but the next time I tried connecting to YAT, no serial port was being detected, I also checked in the Device Manager but port was not being shown there as well. Also, 3.3V LED is not turned on, does it mean that my board is fried?

@Phaedrux said in Extruder Heater and Thermocouple not working:

M98 P"config.g"

yes, I run it but have not got any result yet, does it take a long time.

@Phaedrux yes, now I have define H1:3 with Tool 0 which is extruder. Now, I am getting this error
m303 h1 p1 s100 t0
Error: M303: heater 1 reported error 'unknown sensor' at start of auto tuning<LF>ok<LF>

What can b ethe reason?

Yes I am using two thermocouple daughter boards and three T type thermocouples.

Hi,

Can anyone guide me, how to run heaters? Which GCode should be used to run heaters? In the configuration file, heaters are defines as follows:

; 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 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 S120                                  ; set temperature limit for heater 0 to 120C
M308 S1 P"spi.cs1" Y"thermocouple-max31856" K"T" ; configure sensor 1 as thermocouple via CS pin spi.cs0
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
M308 S2 P"spi.cs2" Y"thermocouple-max31856" K"T" ; configure sensor 2 as thermocouple via CS pin spi.cs1
M950 H2 C"out2" T2                            ; create nozzle heater output on out2 and map it to sensor 2
M307 H2 B0 S1.00                              ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                  ; set temperature limit for heater 2 to 280C
M308 S3 P"spi.cs3Y6" Y"thermocouple-max31856" K"T" ; configure sensor 3 as thermocouple via CS pin spi.cs2
M950 H3 C"out3" T3                            ; create nozzle heater output on out3 and map it to sensor 3
M307 H3 B0 S1.00                              ; disable bang-bang mode for heater  and set PWM limit
M143 H3 S280                                  ; set temperature limit for heater 3 to 280C

now how can I run them, using M104 GCode?

@Phaedrux by this I mean that I am not getting any voltage from thermocouple and heaters do not run.

Hi, following is my config file, but my heaters are not working```
; Configuration file for Duet 3 MB 6XD (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Thu Dec 01 2022 15:05:36 GMT-0700 (Mountain Standard Time)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Duet 3 6XD Test" ; set printer name

; Network
M552 S0 ; disable network

; Drives
M569 P0.0 S0 T10 R0 ; physical drive 0.0 goes backwards
M569 P0.1 S0 T10 R0 ; physical drive 0.1 goes backwards
M569 P0.2 S1 T10 R0 ; physical drive 0.2 goes forwards
M569 P0.3 S1 T10 R0 ; physical drive 0.3 goes forwards
M584 X0.0 Y0.1 Z0.2 E0.3 ; set drive mapping
M92 X40.00 Y40.00 Z40.00 E420.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X1800.00 Y1500.00 Z1200.00 E180.00 ; set maximum speeds (mm/min)
M201 X40.00 Y40.00 Z40.00 E250.00 ; set accelerations (mm/s^2)
M906 X3150 Y3150 Z4030 E800 ; set motor currents (mA)
M84 S0 ; Disable motor idle current reduction

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X850 Y700 Z365 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 Y1 S1 P"io1.in" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io1.in
M574 Z1 S1 P"io2.in" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io2.in

; Z-Probe
M558 P0 H5 F120 T360 ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:195 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 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 S120                                 ; set temperature limit for heater 0 to 120C
M308 S1 P"spi.cs0" Y"thermocouple-max31856" K"T"; configure sensor 1 as thermocouple via CS pin spi.cs0
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
M308 S2 P"spi.cs1" Y"thermocouple-max31856" K"T"; configure sensor 2 as thermocouple via CS pin spi.cs1
M950 H2 C"out2" T2                           ; create nozzle heater output on out2 and map it to sensor 2
M307 H2 B0 S1.00                             ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                 ; set temperature limit for heater 2 to 280C
M308 S3 P"spi.cs2" Y"thermocouple-max31856" K"T"; configure sensor 3 as thermocouple via CS pin spi.cs2
M950 H3 C"out3" T3                           ; create nozzle heater output on out3 and map it to sensor 3
M307 H3 B0 S1.00                             ; disable bang-bang mode for heater  and set PWM limit
M143 H3 S280                                 ; set temperature limit for heater 3 to 280C

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

; Tools
M563 P0 S"Extruder" D0 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 res to 0C

; Custom settings are not defined

Are there any mistakes in the configuration file?