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-273 on maestro e0temp pins

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Duet Hardware and wiring
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  • undefined
    ejarmo
    last edited by 8 Oct 2020, 12:03

    Re: 2000c on Bed and Hot End

    can anyone confirm for me whether I damaged my board by improperly configuring a thermistor. it is reading -273c (open circuit). I have checked the thermistor resistance and the wiring continuity all the way to the board.

    ? 1 Reply Last reply 8 Oct 2020, 12:23 Reply Quote 0
    • ?
      A Former User
      last edited by A Former User 10 Aug 2020, 12:08 8 Oct 2020, 12:08

      What firmware are you on ?

      As I have already reported this as an issue on RRF-3 with the latest DWC

      When I switch back to RRF-2 and the older DWC the problem disappears

      1 Reply Last reply Reply Quote 0
      • undefined
        ejarmo
        last edited by 8 Oct 2020, 12:10

        I am running v.3 but I had no problems with a pt-100 for a year before that

        1 Reply Last reply Reply Quote 0
        • undefined
          ejarmo
          last edited by 8 Oct 2020, 12:14

          can you think of any reason I would damage the board. when I configured the thermistor i used the internal resistor setting for a wifi board which is 4700 instead of the maestro which is 2700.

          undefined 1 Reply Last reply 8 Oct 2020, 12:23 Reply Quote 0
          • ?
            A Former User @ejarmo
            last edited by 8 Oct 2020, 12:23

            @ejarmo said in -273 on maestro e0temp pins:

            -273c (open circuit)

            I was under the impression (+)2000 was open circuit and -273 was a short circuit?

            1 Reply Last reply Reply Quote 0
            • undefined
              dc42 administrators @ejarmo
              last edited by 8 Oct 2020, 12:23

              @ejarmo said in -273 on maestro e0temp pins:

              can you think of any reason I would damage the board. when I configured the thermistor i used the internal resistor setting for a wifi board which is 4700 instead of the maestro which is 2700.

              That would not damage the board, neither would any other configuration error I believe.

              If you measure the thermistor resistance right at the Duet thermistor terminals, what reading do you get?

              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

              1 Reply Last reply Reply Quote 0
              • undefined
                ejarmo
                last edited by 8 Oct 2020, 12:26

                @ejarmo said in -273 on maestro e0temp pins:

                2000c on Bed and Hot End

                first, thanks for the quick responses. I have been trying to install a dyze high temp thermistor. I am new so I have been a bit lost. through careful reading of the installation resource I now understand that I need to tune the adc high and low gain settings because the sensor has such high resistance.

                undefined 1 Reply Last reply 8 Oct 2020, 12:28 Reply Quote 0
                • undefined
                  dc42 administrators @ejarmo
                  last edited by 8 Oct 2020, 12:28

                  @ejarmo said in -273 on maestro e0temp pins:

                  @ejarmo said in -273 on maestro e0temp pins:

                  2000c on Bed and Hot End

                  first, thanks for the quick responses. I have been trying to install a dyze high temp thermistor. I am new so I have been a bit lost. through careful reading of the installation resource I now understand that I need to tune the adc high and low gain settings because the sensor has such high resistance.

                  Which firmware version are you using? RepRapFirmware 3.2beta1 and later can do this tuning semi-automatically for you. But if you are running RRF 2.x, please note that upgrading to RRF 3.x requires significant changes to the config.g file.

                  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

                  1 Reply Last reply Reply Quote 0
                  • undefined
                    ejarmo
                    last edited by 8 Oct 2020, 12:31

                    I am using v.3 right now but I will upgrade to the beta. is there any links for documentation on the tuning process which I could access.

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                    • undefined
                      ejarmo
                      last edited by 9 Oct 2020, 01:43

                      @dc42 said in -273 on maestro e0temp pins:

                      RepRapFirmware 3.2beta1

                      to answer an earlier question, at approx. 22c the sensor reads 4.25 meg ohms.

                      undefined 1 Reply Last reply 9 Oct 2020, 04:19 Reply Quote 0
                      • undefined
                        ejarmo
                        last edited by 9 Oct 2020, 02:58

                        update: v.3.2beta1 firmware update returns message "error, duet maestro IAP.bin not found"

                        undefined 1 Reply Last reply 9 Oct 2020, 17:29 Reply Quote 0
                        • undefined
                          Veti @ejarmo
                          last edited by 9 Oct 2020, 04:19

                          @ejarmo said in -273 on maestro e0temp pins:

                          to answer an earlier question, at approx. 22c the sensor reads 4.25 meg ohms.

                          this means your thermistor is broken or the wiring is broken

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            ejarmo
                            last edited by 9 Oct 2020, 11:59

                            I don't know. the documentation from dyze is that the reading is supposed to be 4066017.

                            undefined 1 Reply Last reply 9 Oct 2020, 12:09 Reply Quote 0
                            • undefined
                              Veti @ejarmo
                              last edited by Veti 10 Sept 2020, 12:14 9 Oct 2020, 12:09

                              @ejarmo said in -273 on maestro e0temp pins:

                              I don't know. the documentation from dyze is that the reading is supposed to be 4066017.

                              https://docs.google.com/spreadsheets/d/e/2PACX-1vQ5LGUbs4B3uAqrQeEvOqFw1ZFCB3qpAPk3ThCYK9mBS7uiTEF4hjOD6-znxU25MZo19cjhfqDsc06Y/pubhtml

                              at -20. are you in the arctic? 🙂

                              edit: sorry got dize and slice mixed up

                              post how you configured the thermistor

                              1 Reply Last reply Reply Quote 0
                              • undefined
                                Phaedrux Moderator @ejarmo
                                last edited by 9 Oct 2020, 17:29

                                @ejarmo said in -273 on maestro e0temp pins:

                                update: v.3.2beta1 firmware update returns message "error, duet maestro IAP.bin not found"

                                What firmware were you on before? You would have needed to update to 3.0 and then 3.1.1 before updating to the beta. With that missing file you may have needed to update to 2.05.1 first as well.

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • undefined
                                  ejarmo
                                  last edited by 11 Oct 2020, 01:28

                                  this is confusing, if I put the sensor on a meter and it reads 4.6 meg ohms at room temperature. I had taken it the the heated bed to try to match any of the values in the dyze documentation, but none did. Regardless after several stupid mistakes I have firmware 3.2beta1 installed and a reading for the sensor adjusted on the high gain parameter so that it matches the print bed reading. should be close enough. all filaments will get a temperature print test and the sensor will provide rock steady temperatures. I haven't tested it yet but I wanted to thank everyone for the help. if something goes wrong now I will just give up.

                                  undefined undefined 2 Replies Last reply 11 Oct 2020, 01:49 Reply Quote 0
                                  • undefined
                                    ejarmo
                                    last edited by 11 Oct 2020, 01:30

                                    I should also mention thanks especially for the slice temp table.

                                    1 Reply Last reply Reply Quote 0
                                    • undefined
                                      Phaedrux Moderator @ejarmo
                                      last edited by 11 Oct 2020, 01:49

                                      @ejarmo said in -273 on maestro e0temp pins:

                                      I have firmware 3.2beta1 installed

                                      Do keep in mind that it is an early beta and may contain all sorts of surprises. You may want to upload the 3.1.1 zip file just to stay on a stable release during troubleshooting to avoid any confounding variables.

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • undefined
                                        ejarmo
                                        last edited by 11 Oct 2020, 03:18

                                        yes. for example the touchscreen on the printer now does not respond to any control elements. I am only able to go through the separate tabs but none of the items on any of the tabs will respond.

                                        1 Reply Last reply Reply Quote 0
                                        • undefined
                                          Phaedrux Moderator
                                          last edited by 11 Oct 2020, 20:20

                                          If you mean the paneldue you will need to update the paneldue firmware to 1.24 and you will need to add a command to config.g to enable the paneldue.

                                          M575 P1 B57600 S1

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

                                          Z-Bot CoreXY Build | Thingiverse Profile

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