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Weird temperatures displayed with Duet Maestro 1

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  • undefined
    Biggsis
    last edited by Biggsis 4 Mar 2020, 22:40 3 Apr 2020, 22:38

    Hello,

    I want to upgrade a D-Bot with a Duet Maestro 1 I have here for a while.
    Now the weird thing is, that both (Bed and E3D Hotend) Thermistor Temps are shown as around 9° degrees celsius, although the room temperature is around 22°C.
    If I connect both Thermistors to a Duet Wifi, the readings are correct. Only the Maestro shows the 9°C

    Firmware is 2.05 and the Thermistor Lines are the usual:

    M305 P0 R4700 H0 L0
    M305 P1 R4700 H0 L0

    Anyone has an idea, what is wrong?

    Hypercube Evolution User Group : https://www.facebook.com/groups/Hypercubeevolution/
    Kossel Delta XL / XXL User Group : [https://www.facebook.com/groups/KosselXXL/]

    undefined 1 Reply Last reply 3 Apr 2020, 22:51 Reply Quote 0
    • undefined
      droftarts administrators @Biggsis
      last edited by 3 Apr 2020, 22:51

      @Biggsis Maestro doesn't have the same series resistors as Duet Wifi, so R4700 is wrong. Remove it, as the firmware knows the correct value to put in for the hardware, or change it to R2200.

      I'm assuming you actually have more numbers in your M305 than that, eg something like
      M305 P0 T100000 B4138 R2200

      Otherwise, see https://duet3d.dozuki.com/Wiki/Gcode#Section_M305_Set_temperature_sensor_parameters

      Ian

      Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

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      • undefined
        Biggsis
        last edited by 3 Apr 2020, 22:55

        You are right, thank you very much. With the correct parameters the readings are now correct.

        Hypercube Evolution User Group : https://www.facebook.com/groups/Hypercubeevolution/
        Kossel Delta XL / XXL User Group : [https://www.facebook.com/groups/KosselXXL/]

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