Thermistor - read temp only.



  • Building a Railcore II. It has the Duet2 Ethernet and a Duex5.

    The aluminium bed has a groove in for a thermistor which is connected to the bed thermistor input.

    The keenovo heater mat also has a thermistor in it which I would like to just view in DWC.

    I know where to plug it into the Duex5, i think, but do not understand the code.

    Assistance would be appreciated.

    Regards Paul.



  • What I am trying to ask is, What are the thermistor port numbers on the Duex5 please.
    P0 is for the bed heater and P1 is generally for the hotend on the mainboard, but if I am using a thermistor input on the Duex5, what are they please.

    M305 P1 T100000 B4725 C7.060000e-8 ; E3D - Set thermistor + ADC parameters for heater 1

    Regards,
    Paul.


  • administrators

    To view a thermistor without using it to control a heater, in RepRapFirmware 2 you create a virtual heater. Virtual heater numbers 100, 101 and 102 are predefined, so you would normally start yours at 103. Here is a typical command line:

    M305 P103 X5 T100000 B3950 A"Bed heater mat"

    The X5 parameter tells it to use thermistor input 5. Thermistor inputs 0,1,2 are the ones on the Duet. Thermistor inputs 3,4,5,6,7 are on the DueX. The other M305 parameters are the usual thermistor coefficients.



  • @dc42 Thanks for this, greatly appreciated.
    Now I know what I have to do for a room temp.

    Thanks again.

    P.



  • OK, that works and is visable in the 'Temp Chart'.
    Is it possible to display it as numbers in either the tools or Status - Sensors area, please.
    Or is that the only way it can be displayed without assigning it to a tool?

    Regards,

    Paul.


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