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    Mosquito Hotend PT1000 issues

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    Duet Hardware and wiring
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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      Are you sure it's a PT1000 and not a PT100? PT100 would require a daughterboard.

      Z-Bot CoreXY Build | Thingiverse Profile

      wcmartinoundefined 1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators @wcmartino
        last edited by

        @wcmartino do you have a multimeter? If so, disconnect the PT1000 cable at the Duet and measure its resistance.

        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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        • wcmartinoundefined
          wcmartino @Phaedrux
          last edited by

          @Phaedrux I have two of them and they are both pt1000's, very hard to read but it is stamped on the part. Tried both plugged directly into the Duet with the same results.

          @dc42 Measured the resistance at the connector going into the Duet and my spare PT100, at room temp they are reading about 1.1k ohms, which is about what I expect.

          Phaedruxundefined dc42undefined 2 Replies Last reply Reply Quote 0
          • Phaedruxundefined
            Phaedrux Moderator @wcmartino
            last edited by

            @wcmartino said in Mosquito Hotend PT1000 issues:

            Tried both plugged directly into the Duet with the same results.

            Did you change the config to suit?

            Does the spare PT1000 work on the Duet?

            Z-Bot CoreXY Build | Thingiverse Profile

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            • dc42undefined
              dc42 administrators @wcmartino
              last edited by

              @wcmartino yes 1.1K at room temperature is about right.

              Please post a photos showing how the Pt1000 is connected to the Smart Effector, and how the Smart Effector is connected to the Duet.

              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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              • wcmartinoundefined
                wcmartino @Phaedrux
                last edited by wcmartino

                @Phaedrux Yes I changed the config to suit. I get the same results with the spare PT1000.
                @dc42 Pictures attahced.

                PXL_20230204_002830242.jpg PXL_20230204_002755360.jpg PXL_20230204_002747149.jpg

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                • dc42undefined
                  dc42 administrators @wcmartino
                  last edited by dc42

                  @wcmartino it's not entirely clear from your photos, but it looks to me that you have 2 black wires in the cable(s) between the Smart Effector and the Duet. One is carrying one of the PT1000 wires, the other is carrying the ground connection to the Smart Effector. Is it possible that you have those wires crossed?

                  Can you try connecting your spare PT1000 directly to the TEMP2 connector on the Duet in place of the cable from the Smart Effector?

                  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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                  • wcmartinoundefined
                    wcmartino @dc42
                    last edited by

                    @dc42 I tested both PT1000 on the effect and directly on the board. They both show the same issue. Everything works fine with an e3d thermister, have had this printer for years. When I get a mintue I might try and plug them into my 6HC on my CoreXY and see what it shows. Kind of at a loss.

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                    • dc42undefined
                      dc42 administrators @wcmartino
                      last edited by

                      @wcmartino it might be worth running temperature input calibration. See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Temperature_connecting_thermistors_PT1000#semi-automatic-calibration.

                      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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                      • wcmartinoundefined
                        wcmartino @dc42
                        last edited by

                        @dc42 That made no difference. The current Duet Mini 5+ was a rev0.5, which was working fine with the e3d thermistor. I have a new Mini that I just ordered for a different project, so I swapped them out and it is working just fine now. Makes me question if the old Mini is broken and it has not worked right for a while.

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                        • dc42undefined
                          dc42 administrators @wcmartino
                          last edited by

                          @wcmartino did you move the SD card from the original Duet 3 Mini to the new one, or did you use a new SD card? If you used a new SD card then perhaps there is something in the config.g or config-override.g file on the original SD card that was affecting the reading and overriding the calibration, such as a H or L parameter in the M308 command for that sensor.

                          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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                          • wcmartinoundefined
                            wcmartino @dc42
                            last edited by

                            @dc42 I am in SBC mode so nothing changed between the configurations. It is possible there is just something wrong with the older board.

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                            • dc42undefined
                              dc42 administrators @wcmartino
                              last edited by

                              @wcmartino I doubt it, however they will probably need different ADC corrections. Your new board will have had the calibration done and stored during testing; your older board will not. That's why I suggested you perform the calibration. PT1000 sensors are more sensitive to calibration errors than thermistors. Are you sure that you performed the calibration correctly on the older board?

                              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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                              • wcmartinoundefined
                                wcmartino @dc42
                                last edited by

                                @dc42 Yes, tried it several times, nothing helped for either sensor. Will have to revist it antoher day, I already have the printer put back together.

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                                • dc42undefined
                                  dc42 administrators @wcmartino
                                  last edited by dc42

                                  @wcmartino what L and H corrections did the calibration process report?

                                  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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                                  • wcmartinoundefined
                                    wcmartino @dc42
                                    last edited by

                                    @dc42 Ok reconnested the board. With the sensor disconnected H reports -6. Jumpering the connector on the effector and running the l999 says correction is 1.

                                    With the resistor in place upon booting it shows -20.5C. If I manually set H to -127 I still show -15.3C.

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                                    • dc42undefined
                                      dc42 administrators @wcmartino
                                      last edited by

                                      @wcmartino have you tried using a different temperature input?

                                      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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                                      • wcmartinoundefined
                                        wcmartino @dc42
                                        last edited by

                                        @dc42 Appoligies for the delayed response. I get the same results. I am good with running the nerw board on the Delta.

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                                        • dc42undefined
                                          dc42 administrators @wcmartino
                                          last edited by

                                          @wcmartino when and where did you purchase the original board?

                                          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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                                          • wcmartinoundefined
                                            wcmartino @dc42
                                            last edited by

                                            @dc42 I purchased the board from Fliastruder way back in Dec 2020.

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