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    Same thermistor and setting but reads different temp

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    Duet Hardware and wiring
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    • stephencundefined
      stephenc
      last edited by

      Hi,

      I have 2 separate identical hotend setup. Heater config below. I was able to print with the 1st hotend so I know that number is correct. but the 2nd hotend puzzle me because it give me higher reading… any idea?

      ; Heaters
      M143 S260 ; Set maximum heater temperature to 260C
      M140 H-1 ; Disable heated bed
      M305 P1 T100000 B4725 C7.06e-8 R4700 ; Set thermistor + ADC parameters for heater 1
      M305 P2 T100000 B4725 C7.06e-8 R4700 ; Set thermistor + ADC parameters for heater 2
      M307 H1 A535.7 C135.1 D2.6 B0 S0.8
      M307 H2 A535.7 C135.1 D2.6 B0 S0.8

      Stephen
      https://github.com/stephenci/ZideX

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      • Dougal1957undefined
        Dougal1957
        last edited by

        try swapping the thermistor leads round (Don't try and print like that though) and see if the temps move with the thermistor if they do then you have a bad Thermistor or the wiring of that

        Doug

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        • dc42undefined
          dc42 administrators
          last edited by

          Also check that you don't have another M305 command later in config.g.

          Duet WiFi hardware designer and firmware engineer
          Please do not ask me for Duet support via PM or email, use the forum
          http://www.escher3d.com, https://miscsolutions.wordpress.com

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          • stephencundefined
            stephenc
            last edited by

            yeah I swapped it with the 1st toolhead connector and 2nd toohead thermistor now reads normal. checking for bad wiring….

            Stephen
            https://github.com/stephenci/ZideX

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