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    Thermistor at 2000c

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    • Bewarenundefined
      Bewaren @Phaedrux
      last edited by

      @Phaedrux I do not no, I am using the thermistor provided with the E3D Hotend for the smart effector, I believe it is a PT100, correct? It was a while back since I bought it.

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      • Bewarenundefined
        Bewaren @Phaedrux
        last edited by

        @Phaedrux I have pins T3 - T4 wired up, is that correct?

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        • Phaedruxundefined
          Phaedrux Moderator
          last edited by

          I'm not sure what you bought. 😀

          To use a pt100 you'll need the pt100 daughter board.

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          • Phaedruxundefined
            Phaedrux Moderator
            last edited by

            Can you post some photos?

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            • Bewarenundefined
              Bewaren @Phaedrux
              last edited by

              @Phaedrux alt text20200616_005347.jpg 20200616_005354.jpg

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              • Bewarenundefined
                Bewaren @Phaedrux
                last edited by

                @Phaedrux Hope these help

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                • Bewarenundefined
                  Bewaren
                  last edited by

                  The wiring it a little messy at the moment, please excuse it xD

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                  • Phaedruxundefined
                    Phaedrux Moderator
                    last edited by

                    Well we need to verify what sensor you are actually using. Is it a thermistor or PT100. If it's a PT100 you will need the daughter board before you can use it.

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                    • Bewarenundefined
                      Bewaren @Phaedrux
                      last edited by

                      @Phaedrux 20200616_010917.jpg

                      This is the thermistors or PT100 I am using, not sure if it helps identify it

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                      • Phaedruxundefined
                        Phaedrux Moderator
                        last edited by Phaedrux

                        I believe the E3D PT100s use red wires and the thermistors are blue. But I'm not sure if that's a hard rule, but I think that's generally the case.

                        https://e3d-online.com/collections/printer-parts-electrical/products/thermistor-cartridge
                        https://e3d-online.com/collections/printer-parts-electrical/products/pt100-temperature-sensor

                        You should try to verify with your invoice or email confirmation from your purchase to be sure.

                        You'll need a daughter board to be able to read the PT100.
                        https://duet3d.dozuki.com/Wiki/Connecting_PT100_temperature_sensors

                        https://e3d-online.com/products/pt100-daughterboard-for-duet-wifi?_pos=4&_sid=8859bba4b&_ss=r

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                        • Bewarenundefined
                          Bewaren
                          last edited by

                          Alright I can confirm it's a PT100, found the invoice. I will get one ordered asap.

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                          • Phaedruxundefined
                            Phaedrux Moderator
                            last edited by

                            Glad we got that sorted out. Once you have the daughterboard installed and connected you'll need to make a change to your temp sensor config to point to the PT100.

                            M308 S1 P"spi.cs1" Y"rtd-max31865"             ; 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
                            

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                            • A Former User?
                              A Former User @Phaedrux
                              last edited by

                              You should try to verify with your invoice or email confirmation from your purchase to be sure.

                              suppose its still possible they could have shipped the wrong one, to be sure use a multimeter and measure the resistance at room temperature; PT100 should be about 100 ohm, and PT1000 should be about 1000 ohm.

                              (Techincally PT100 is 100 ohm at 0°C and closer to 110 at room temperature, and 1100 ohm for PT1000)

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                              • Bewarenundefined
                                Bewaren @A Former User
                                last edited by

                                @bearer comes back at 109 ohm

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                                • sg2020undefined
                                  sg2020 @Phaedrux
                                  last edited by

                                  @phaedrux I was also trying to get my E3D PT100 sensor to work and your code helped. Could you explain why this works? Why does it need p"spi.cs1"? why is it configuring the sensor 1 as a thermocouple?

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                                  • Phaedruxundefined
                                    Phaedrux Moderator @sg2020
                                    last edited by

                                    @sg2020 said in Thermistor at 2000c:

                                    @phaedrux I was also trying to get my E3D PT100 sensor to work and your code helped. Could you explain why this works? Why does it need p"spi.cs1"? why is it configuring the sensor 1 as a thermocouple?

                                    Ignore the comment on that line. It's not actually a thermocouple, that's just the comment that the config tool has added. It seems to be the same regardless of what type of daughterboard you've chosen.

                                    The important thing is that you're telling it what pin you're using (spi.cs1) and what type of daughterboard chip you're using (rtd-max31865).

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                                    • tony449777undefined
                                      tony449777 @Phaedrux
                                      last edited by

                                      @phaedrux So if the channel 1 on the card is “spi.cs1”
                                      And you have one daughter board with the two ports, then is the second port for the same card “spi.cs2”?

                                      Is there any pages that you can recommend that would help me understand what this means?

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                                      • Phaedruxundefined
                                        Phaedrux Moderator @tony449777
                                        last edited by

                                        @tony449777 said in Thermistor at 2000c:

                                        Is there any pages that you can recommend that would help me understand what this means?

                                        https://duet3d.dozuki.com/Wiki/Temperature_sensors
                                        https://duet3d.dozuki.com/Wiki/Connecting_PT100_temperature_sensors
                                        https://duet3d.dozuki.com/Wiki/PT100_temperature_sensor_daughter_board

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