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    Laser Filament Monitor - test results

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    Filament Monitor
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    • Qdeathstarundefined
      Qdeathstar
      last edited by

      Ok, last ABS test

      Matterhackers Light - Blue ABS filament - Benchy Test

      Calculated Steps/mm 424

      M591 D0
      Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 120%, check every 3.0mm, current position -2.4, brightness 92, shutter 11, measured minimum 0%, average 93%, maximum 102% over 3975.4mm

      wilrikerundefined T3P3Tonyundefined 2 Replies Last reply Reply Quote 0
      • wilrikerundefined
        wilriker @Qdeathstar
        last edited by

        @qdeathstar You seem to like ABS. 😉

        Manuel
        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
        with probably always latest firmware/DWC (incl. betas or self-compiled)
        My Tool Collection

        1 Reply Last reply Reply Quote 0
        • T3P3Tonyundefined
          T3P3Tony administrators @Qdeathstar
          last edited by

          @qdeathstar said in Laser Filament Monitor - test results:

          Ok, last ABS test

          Matterhackers Light - Blue ABS filament - Benchy Test

          Calculated Steps/mm 424

          M591 D0
          Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 120%, check every 3.0mm, current position -2.4, brightness 92, shutter 11, measured minimum 0%, average 93%, maximum 102% over 3975.4mm

          minimum 0?

          do you mind checking that again?

          www.duet3d.com

          Qdeathstarundefined 1 Reply Last reply Reply Quote 0
          • Qdeathstarundefined
            Qdeathstar
            last edited by

            Yes, i can rerun that test later today. I think that might have been a real slippage, as this blue filament feels pretty slippery. I also noticed while i was loading it it didn't move the first time i pressed "extrude" but i chalked it up to me accidentally pressing the "retract" button instead. Its about 2 years old....

            1 Reply Last reply Reply Quote 0
            • kraegarundefined
              kraegar
              last edited by

              I like spreadsheets, so I created one for tracking my results. Any other data needed?

              https://docs.google.com/spreadsheets/d/1a5suKtijUsatl3DhUFiox_rfW39qo9kHSlihYHaAcxo/edit?usp=sharing

              Co-Creator of the RailcoreII CoreXY printer
              https://www.thingiverse.com/thing:2407174

              tinkerzundefined 1 Reply Last reply Reply Quote 0
              • tinkerzundefined
                tinkerz @kraegar
                last edited by

                @kraegar Thank you! Not sure why I didn't think of putting it up on Google docs, here I have all my results in good 'ol Notepad++. Thank you again. This makes it easy to keep updated without worrying about saving, losing or sharing.

                Tinkerz

                kraegarundefined 1 Reply Last reply Reply Quote 0
                • kraegarundefined
                  kraegar @tinkerz
                  last edited by

                  @tinkerz No problem - I have a ridiculous number of data tracking spreadsheets for 3d printing. I can't do anything without tracking it, lol.

                  Co-Creator of the RailcoreII CoreXY printer
                  https://www.thingiverse.com/thing:2407174

                  1 Reply Last reply Reply Quote 0
                  • Qdeathstarundefined
                    Qdeathstar @T3P3Tony
                    last edited by

                    @t3p3tony said in Laser Filament Monitor - test results:

                    @qdeathstar said in Laser Filament Monitor - test results:

                    Ok, last ABS test

                    Matterhackers Light - Blue ABS filament - Benchy Test

                    Calculated Steps/mm 424

                    M591 D0
                    Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 120%, check every 3.0mm, current position -2.4, brightness 92, shutter 11, measured minimum 0%, average 93%, maximum 102% over 3975.4mm

                    minimum 0?

                    do you mind checking that again?

                    M591 D0
                    Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 120%, check every 3.0mm, current position -3.0, brightness 91, shutter 11, measured minimum 88%, average 95%, maximum 102% over 3973.3mm

                    Better result this time.

                    1 Reply Last reply Reply Quote 0
                    • wilrikerundefined
                      wilriker
                      last edited by

                      Finally managed to print the sensor housing. It seems that the lazy-me (why should I disassemble my X axis before lubricating it?) got some PTFE on my build plate - perfect for first-layer adhesion. 🤦 Luckily nothing that gluestick won't overcome. 😂

                      So, assembly and mounting of the sensor probably tonight. 🙂

                      Manuel
                      Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                      with probably always latest firmware/DWC (incl. betas or self-compiled)
                      My Tool Collection

                      1 Reply Last reply Reply Quote 0
                      • wilrikerundefined
                        wilriker
                        last edited by wilriker

                        Finally, the first result I can contribute:

                        Generic Black PLA (the same that is used for the housing):
                        Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 120%, check every 3.0mm, current position -7.9, brightness 60, shutter 17, measured minimum 80%, average 87%, maximum 93% over 320.6mm

                        Housing: @dc42 original, Open Top, 9mm base
                        PTFE Tubing: Generic 4mm OD 2mm ID (I will probably switch to the included Capricorn when I first switch housing parts.

                        I am so happy to be part of the test group. As I don't have too many filaments I will probably mainly be concentrating on housing performance.


                        Also, this gave me a chance to solve a very annoying issue I introduced myself when I added my reverse bowden. It literally took me 15-20 minutes(!) to change filament because the extruder-near end of it was totally in the way and I ended up disassembling the extruder every other time.
                        The sensor housing now also is my reverse bowden endpoint and is mounted via nuts and screws so I can easily remove it when loading filaments. 🕺

                        EDIT: Also no started a Google Spreadsheet.

                        Manuel
                        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                        with probably always latest firmware/DWC (incl. betas or self-compiled)
                        My Tool Collection

                        1 Reply Last reply Reply Quote 1
                        • fmaundefined
                          fma
                          last edited by fma

                          Ok, here is my first result. I use David's enclosure, printed in black PLA.

                          I printed a part with Dailyfil cream white: https://www.filimprimante3d.fr/filament-pla-175-mm/1470-bobine-pla-dailyfil-blanc-creme-175-mm-1kg.html

                          Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 140%, check every 3.0mm, current position -10.2, brightness 94, shutter 8, measured minimum 53%, average 93%, maximum 107% over 5764.6mm

                          Frédéric

                          1 Reply Last reply Reply Quote 1
                          • fmaundefined
                            fma
                            last edited by

                            Second test with SOVB3D purple PLA: http://www.sovb3d.fr/pla-175mm-standard-500g/90-fil-pla-violet-175mm-500g.html

                            Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 140%, check every 3.0mm, current position 2.7, brightness 93, shutter 11, measured minimum 56%, average 84%, maximum 99% over 3425.2mm

                            Frédéric

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

                              FWIW the shutter reading is an indication of how much of the laser light is returning back to the sensor, which should be mostly determined by how reflective the filament is. High shutter reading = low refectivity.

                              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

                              wilrikerundefined 1 Reply Last reply Reply Quote 0
                              • wilrikerundefined
                                wilriker @dc42
                                last edited by

                                @dc42 I wanted to ask about shutter anyway. What is the range of values and what qualifies as high/low value?
                                And when we are at that, can you also say something about the brightness value?

                                Manuel
                                Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                                with probably always latest firmware/DWC (incl. betas or self-compiled)
                                My Tool Collection

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

                                  The brightness is the average brightness of IR light received on the sensor. It doesn't usually vary as much as the shutter does, because the sensor appears to adjusts the shutter to try to keep the brightness constant.

                                  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
                                  • kraegarundefined
                                    kraegar
                                    last edited by

                                    So to be clear, the ideal situation would be a totally enclosed housing that doesn't reflect any IR back?

                                    Co-Creator of the RailcoreII CoreXY printer
                                    https://www.thingiverse.com/thing:2407174

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

                                      @kraegar said in Laser Filament Monitor - test results:

                                      So to be clear, the ideal situation would be a totally enclosed housing that doesn't reflect any IR back?

                                      Yes, I think so.

                                      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
                                      • kraegarundefined
                                        kraegar
                                        last edited by

                                        What wavelength is the IR?

                                        Co-Creator of the RailcoreII CoreXY printer
                                        https://www.thingiverse.com/thing:2407174

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

                                          @kraegar said in Laser Filament Monitor - test results:

                                          What wavelength is the IR?

                                          850nm.

                                          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 1
                                          • fmaundefined
                                            fma
                                            last edited by

                                            Another result, with Dailyfil Dark gray PLA: https://www.filimprimante3d.fr/filament-pla-175-mm/1479-pla-175mm-dailyfil-gris-fonce-1kg.html

                                            Duet3D laser filament monitor on endstop input 3, disabled, allowed movement 40% to 140%, check every 3.0mm, current position -1.7, brightness 92, shutter 17, measured minimum 89%, average 97%, maximum 109% over
                                            9032.8mm

                                            Soon a result with their blue PLA ("Tardis RAL")...

                                            Frédéric

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