Same thermistor and setting but reads different temp



  • 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



  • 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


  • administrators

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



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


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