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    Heater fault when extruder start.

    Duet Hardware and wiring
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    • eRick
      eRick last edited by

      Hello,
      Every time when i start extrusion, heater have fallout (2000 C). On cold extrusion too. I use PT100. What could be causing this?

      ;--- Heaters
      M308 S0 P"bedtemp" Y"thermistor" A"Bed" T100000 B4138	; configure sensor 0 as thermistor on pin bedtemp
      M950 H0 C"bedheat" T0									; create bed heater output on bedheat and map it to sensor 0
      M307 H0 B0 S1.00										; disable bang-bang mode for the bed heater and set PWM limit
      M140 H0													; map heated bed to heater 0
      M143 H0 S120											; set temperature limit for heater 0 to 120C
      M308 S1 P"spi.cs1" Y"rtd-max31865" A"Extruder"			; configure sensor 1 as thermocouple via CS pin spi.cs1
      M950 H1 C"e0heat" T1									; create nozzle heater output on e0heat and map it to sensor 1
      M307 H1 B0 S1.00										; disable bang-bang mode for heater  and set PWM limit
      
      
      jay_s_uk 1 Reply Last reply Reply Quote 0
      • jay_s_uk
        jay_s_uk @eRick last edited by

        @eRick could well be interference from the motor cables.
        Does the PT100 cables run in the same bundle as the motor?

        1 Reply Last reply Reply Quote 0
        • eRick
          eRick last edited by

          @jay_s_uk said in Heater fault when extruder start.:

          Does the PT100 cables run in the same bundle as the motor?

          Yes, but on my old configuration he worked correctly.

          jay_s_uk 1 Reply Last reply Reply Quote 0
          • jay_s_uk
            jay_s_uk @eRick last edited by

            @eRick you'll have to elaborate a bit more on what your old configuration was

            1 Reply Last reply Reply Quote 0
            • eRick
              eRick last edited by

              @jay_s_uk said in Heater fault when extruder start.:

              @eRick you'll have to elaborate a bit more on what your old configuration was

              He was same but wichout covers and with old firmware.

              I will try separate motor cable from heater cable.

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              • eRick
                eRick last edited by

                @eRick said in Heater fault when extruder start.:

                I will try separate motor cable from heater cable.

                God damn, it work. @jay_s_uk thanks for help :3

                1 Reply Last reply Reply Quote 1
                • eRick
                  eRick last edited by

                  @jay_s_uk
                  When I will replace extruder cable on shielded cable then that will it helps?

                  jay_s_uk 1 Reply Last reply Reply Quote 0
                  • jay_s_uk
                    jay_s_uk @eRick last edited by

                    @eRick that would certainly reduce things but I think a shielded cable for the PT100 is also a good idea

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                    • eRick
                      eRick last edited by

                      Ok thanks.

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