Where does the temperature daughter board go on Duet3?



  • I can't find anything in any documentation - Where do I install it, and in what orientation?

    Tried this - it seemed logical, is this correct?

    IMG_3046.JPG

    I'm connecting it to a Ultimaker K-Type thermocoupler - is my configuration correct?

    ; Heaters
    M308 S0 P"spi.cs0" Y"thermocouple-max31855" ; configure sensor 0 as thermocouple via CS pin spi.cs0
    M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
    M143 H0 S120 ; set temperature limit for heater 0 to 120C
    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
    M308 S1 P"spi.cs1" Y"thermocouple-max31855" ; configure sensor 1 as thermocouple via CS pin spi.cs1
    M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1
    M143 H1 S280 ; set temperature limit for heater 1 to 280C
    M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

    Thank you.



  • From your picture, you are using Pt100 daughterboard. As far as i know, thermocouple needs another daughterboard, for thermocouple. Pt100 board will not work with thermocouples.
    https://duet3d.dozuki.com/Wiki/Thermocouple_daughter_board



  • Thank you - turns out the UM2 does not use Thermocoubles, but a PT100 RTD (Resistance Temperature Detectors) Device, so I did have the correct daughter board, I just had to short the solder pins (red circles) and my config (that works) is:

    ; Heaters
    M308 S0 P"spi.cs0" Y"rtd-max31865" ; configure sensor 0 as thermocouple via CS pin spi.cs0
    M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
    M143 H0 S120 ; set temperature limit for heater 0 to 120C
    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
    M308 S1 P"spi.cs1" Y"rtd-max31865" ; configure sensor 1 as thermocouple via CS pin spi.cs1
    M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1
    M143 H1 S280 ; set temperature limit for heater 1 to 280C
    M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

    IMG_3048.JPG


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