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    Auto pressure advance turning by hotend pressure

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    • PenguinAkikoundefined
      PenguinAkiko @Charlie
      last edited by

      @Charlie Yes prusa has implemented it

      Charlieundefined MJLewundefined 2 Replies Last reply Reply Quote 0
      • Richard Fundefined
        Richard F @Charlie
        last edited by

        @Charlie would a mouse optical sensor work to monitor filament

        do we need more than this for a run out trigger Untitled.png

        oliofundefined Charlieundefined 2 Replies Last reply Reply Quote 0
        • oliofundefined
          oliof @Richard F
          last edited by

          @Richard-F that's the simple runout switch that you find on many printers. There are other filament failures you'd want to catch.

          <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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          • Charlieundefined
            Charlie @PenguinAkiko
            last edited by

            @penguinya Do you have a link to this? I havent seen anything about it.

            PenguinAkikoundefined 1 Reply Last reply Reply Quote 1
            • Charlieundefined
              Charlie @Richard F
              last edited by

              @Richard-F It would absolutely work. Ive seen a few systems using this, and Ive used it myself in the past. I know the Duet supports it, though Id recommend looking around to see how others have implemented it. (eg: using printed levers to contact the filament instead of the switch lever contacting the filament directly)

              Richard Fundefined 1 Reply Last reply Reply Quote 1
              • Richard Fundefined
                Richard F @Charlie
                last edited by

                @Charlie Thanks 🙂

                Charlieundefined 1 Reply Last reply Reply Quote 0
                • Charlieundefined
                  Charlie @Richard F
                  last edited by

                  @Richard-F Youre welcome. Happy Printing! 🙂

                  1 Reply Last reply Reply Quote 0
                  • PenguinAkikoundefined
                    PenguinAkiko
                    last edited by

                    Just an updating.
                    29e4d811-198b-4c9a-b74e-a4e8dd480b3d-image.png

                    Charlieundefined 1 Reply Last reply Reply Quote 0
                    • PenguinAkikoundefined
                      PenguinAkiko @Charlie
                      last edited by

                      @Charlie https://help.prusa3d.com/article/stuck-filament-detection-13101-mk4-21101-mk3-9-17108-xl_690089

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                      • Charlieundefined
                        Charlie @PenguinAkiko
                        last edited by

                        @penguinya I love it! I'm assuming that the geometry near the top is to allow for deflection that can be measured using a strain gage.

                        Random thought though. Would it be necessary to constrain it some other way to prevent loads from being transmitted from the model being printed to the load cell? Like, if you do a travel move, and the nozzle skips along the top of the print, it will transfer load to the load cell. Perhaps this can be mitigated in firmware (by not taking measurements unless its actively extruding) or filtering out certain frequencies.

                        PenguinAkikoundefined 1 Reply Last reply Reply Quote 0
                        • PenguinAkikoundefined
                          PenguinAkiko @Charlie
                          last edited by

                          @Charlie According to the simulation results, the impact on printing is unobservable.
                          Aluminum 6061, 100N force
                          ab5831fc-4152-482d-bb48-bb1e8764427f-image.png

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                          • PenguinAkikoundefined
                            PenguinAkiko @PenguinAkiko
                            last edited by

                            @penguinya Just early version, I think it is ok.
                            70946c98-f163-462b-9e64-7cb786ede6d0-image.png

                            Charlieundefined 1 Reply Last reply Reply Quote 0
                            • Charlieundefined
                              Charlie @PenguinAkiko
                              last edited by

                              @penguinya Cool work! And apologies if I was unclear, but I was thinking that the print itself may induce feedback that may skew how the strain is being determined. Not that the reduced material would affect print quality. But again, that may be able to be filtered out.

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                              • MJLewundefined
                                MJLew @PenguinAkiko
                                last edited by

                                @penguinya Yes, it's operating on Prusa MK4 and XL, but I had to turn it off on my machine because it was falsely triggering on the first layers when they had low layer height. I suspect that there might need to be some exception incorporated for those circumstances.

                                They have described it in these release notes.

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                                • Tinchusundefined
                                  Tinchus
                                  last edited by

                                  @T3P3Tony I have a meeting a super long time ago with the trinamics team, it was the time were they were just launching their drivers. They made to me a presentation, where they showed me on a screen how sensitive was their torque detection on a common nema17 motor. I clearly rememnber thatn even a very soft touch to the motor axis using my finger, was being detected by the driver and shown on screen.
                                  This is basically the stall detection capabilities.
                                  I have a long no started idea to try to tune the 5160 drivers on the extruder to be able to detect a change on pressure change while extruding. I managed to do something (not finished) but woulkd it be possible for you to access directly thjrough firmware the driver data and detect these torque changes?
                                  This would be my idea on how to do it with your actual hardware. I think It would be possible, trinamics offers its API of their drivers to work on such features too.

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