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Thermistor daughterboard beginner question.

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  • undefined
    sd_matt @dc42
    last edited by 2 Aug 2020, 19:16

    @dc42 What info are you missing. I can re post

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    • undefined
      sd_matt @davidvh86
      last edited by 2 Aug 2020, 19:22

      @davidvh86 Is there anything you want me to post to clear up any confusion?

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      • undefined
        Phaedrux Moderator
        last edited by 2 Aug 2020, 20:01

        Post a photo of the sensor and the board.

        Z-Bot CoreXY Build | Thingiverse Profile

        undefined 3 Replies Last reply 2 Aug 2020, 20:51 Reply Quote 0
        • undefined
          sd_matt @Phaedrux
          last edited by 2 Aug 2020, 20:51

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

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          • undefined
            sd_matt @Phaedrux
            last edited by 2 Aug 2020, 20:59

            Screenshot (26).png

            undefined 1 Reply Last reply 2 Aug 2020, 22:14 Reply Quote 0
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              sd_matt @Phaedrux
              last edited by 2 Aug 2020, 21:02

              @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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              • undefined
                dc42 administrators
                last edited by dc42 8 Mar 2020, 06:35 2 Aug 2020, 21:38

                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

                undefined 1 Reply Last reply 3 Aug 2020, 04:01 Reply Quote 0
                • undefined
                  Phaedrux Moderator @sd_matt
                  last edited by 2 Aug 2020, 22:14

                  @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

                  undefined 1 Reply Last reply 3 Aug 2020, 05:35 Reply Quote 0
                  • undefined
                    sd_matt @dc42
                    last edited by 3 Aug 2020, 04:01

                    @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

                    undefined 1 Reply Last reply 3 Aug 2020, 06:48 Reply Quote 0
                    • undefined
                      sd_matt @Phaedrux
                      last edited by 3 Aug 2020, 05:35

                      @Phaedrux Ordered the part

                      undefined 1 Reply Last reply 3 Aug 2020, 22:15 Reply Quote 0
                      • undefined
                        dc42 administrators @sd_matt
                        last edited by 3 Aug 2020, 06:48

                        @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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                        • undefined
                          Kayjay
                          last edited by 3 Aug 2020, 12:01

                          @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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                          • undefined
                            Phaedrux Moderator @sd_matt
                            last edited by 3 Aug 2020, 22:15

                            @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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