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    Switch to Pt-100

    Tuning and tweaking
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    • CarlBosson
      CarlBosson last edited by

      So I changed to a Pt-100 for high temp printing. I can manually enter "M305 P1 X200" and the control will display the correct temp. I would like to make this change permanent. Below is the line from the config.g in settings. I tried M305 P1 X200 B4138 R4700 with no luck. Can someone tell me how to fix this?

      M305 P1 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 1

      I would also like to know how to adjust the temp limits for the bed and extruder. I plan to print PEKK so I need to adjust up to 140C on the bed temp and 360C on the extruder.

      deckingman 1 Reply Last reply Reply Quote 0
      • Veti
        Veti last edited by Veti

        @carlbosson said in Switch to Pt-100:

        M305 P1 X200

        just replace the line with exactly that. no B or R value

        for the max value adjust these lines

        M143 H0 S120 ; set temperature limit for heater 0 to 120C
        M143 H1 S280 ; set temperature limit for heater 1 to 280C

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

          Sorry adding just "M305 P1 X200" Seems to have done the trick.☺

          1 Reply Last reply Reply Quote 0
          • deckingman
            deckingman @CarlBosson last edited by deckingman

            @carlbosson As you have discovered, when using a PT100 you don't need the B and R parameters. Simply replace your existing M305 line with M305 P1 X200.

            The maximum temperature limits are set using M143 https://duet3d.dozuki.com/Wiki/Gcode#Section_M143_Maximum_heater_temperature

            Edit - we must have been typing at the same time so I missed you last post.

            Ian
            https://somei3deas.wordpress.com/
            https://www.youtube.com/@deckingman

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            • CarlBosson
              CarlBosson @Veti last edited by

              @veti Thank you, I missed adding the adjustment after S. All seems to be working now! Thanks

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