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    Thermistor daughterboard beginner question.

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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      Post a photo of the sensor and the board.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • sd_mattundefined
        sd_matt @Phaedrux
        last edited by

        @Phaedrux 20200802_121400.jpg ![0_1596401451712_20200802_134550.jpg](Uploading 100%) ![0_1596401481981_20200802_134550.jpg](Uploading 100%)

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        • sd_mattundefined
          sd_matt @Phaedrux
          last edited by

          Screenshot (26).png

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          • sd_mattundefined
            sd_matt @Phaedrux
            last edited by

            @Phaedrux With the wire, or a 100 ohm resistor, or simply with the "daughterboard" removed I get the same result.......2000 and faultScreenshot (27).png

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            • dc42undefined
              dc42 administrators
              last edited by dc42

              Use the 100 ohm resistor. A wire will give you a 2000 reading.

              If you send the M305 P3 X201 command from the console, does it respond with an error message?

              What is the response if you send M305 P3 X200?

              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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              • Phaedruxundefined
                Phaedrux Moderator @sd_matt
                last edited by

                @sd_matt said in Thermistor daughterboard beginner question.:

                Screenshot (26).png

                That is a thermistor, not a PT100 sensor.

                Either connect the thermistor directly to the thermistor inout on the Duet board, or get a PT100 sensor like this to use with the daughterboard.

                https://e3d-online.com/products/pt100-temperature-sensor

                Z-Bot CoreXY Build | Thingiverse Profile

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                • sd_mattundefined
                  sd_matt @dc42
                  last edited by

                  @dc42 said in Thermistor daughterboard beginner question.:

                  If you send the M305 P3 X201 command from the console, does it respond with an error message?
                  What is the response if you send M305 P3 X200?

                  If you send the M305 P3 X201 command from the console, does it respond with an error message?
                  No

                  What is the response if you send M305 P3 X200?
                  M305 P3 X200
                  Error: Failed to initialise RTD: bad response from sensor

                  dc42undefined 1 Reply Last reply Reply Quote 0
                  • sd_mattundefined
                    sd_matt @Phaedrux
                    last edited by

                    @Phaedrux Ordered the part

                    Phaedruxundefined 1 Reply Last reply Reply Quote 0
                    • dc42undefined
                      dc42 administrators @sd_matt
                      last edited by

                      @sd_matt said in Thermistor daughterboard beginner question.:

                      @dc42 said in Thermistor daughterboard beginner question.:

                      If you send the M305 P3 X201 command from the console, does it respond with an error message?
                      What is the response if you send M305 P3 X200?

                      If you send the M305 P3 X201 command from the console, does it respond with an error message?
                      No

                      What is the response if you send M305 P3 X200?
                      M305 P3 X200
                      Error: Failed to initialise RTD: bad response from sensor

                      You can also try sending just M305 P3. The response should include a description of the last error.

                      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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                      • Kayjayundefined
                        Kayjay
                        last edited by

                        @sd_matt it would appear that you are trying to connect a thermistor to the daughterboard. The daughterboard you have is for use with a PT100, there are links above taking you to a page that shows very clearly how to connect it.
                        If you connect the PT100 to the connector you have the wire linked in the photo then use M305 P3 X201, if you use the other connector then select channel 200 instead of 201.

                        If you want to use the thermistor then it will need to be connected to the appropriate terminal on the Duet motherboard not the daughterboard.

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                        • Phaedruxundefined
                          Phaedrux Moderator @sd_matt
                          last edited by

                          @sd_matt said in Thermistor daughterboard beginner question.:

                          @Phaedrux Ordered the part

                          Great. In the meantime, you should try using the resistor that came with the daughterboard to check that the daughterboard and your configuration is working, so that when the sensor arrives you can connect it and be up and running quickly.

                          https://duet3d.dozuki.com/Wiki/PT100_temperature_sensor_daughter_board

                          https://duet3d.dozuki.com/Wiki/Connecting_PT100_temperature_sensors

                          Z-Bot CoreXY Build | Thingiverse Profile

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