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    Laser filament monitor

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    Filament Monitor
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    • hedeonundefined
      hedeon
      last edited by

      Just woke up to another failed large print due to a jam. Please add me to your list. I am UK based, tinkerer, with some experience in programming Arduino and ESP microcontrollers.

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      • bazhipundefined
        bazhip
        last edited by

        Please throw me on there too @dc42

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        • Phaedruxundefined
          Phaedrux Moderator
          last edited by

          You've probably got more than enough, but I'd test it too.

          Z-Bot CoreXY Build | Thingiverse Profile

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          • Qdeathstarundefined
            Qdeathstar
            last edited by

            looking forward to an eta

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            • timcurtis67undefined
              timcurtis67
              last edited by

              Any kind of ETA on these new filament monitors?

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              • Biggsisundefined
                Biggsis
                last edited by Biggsis

                I would be interested in testing one of those too, since I have several printers (CoreXY and Deltas, all with DUETs), use OpenSCAD myself and do Arduino Programming, I think I meet the conditions (Except living in Germany and not in the UK 🙂 )

                Hypercube Evolution User Group : https://www.facebook.com/groups/Hypercubeevolution/
                Kossel Delta XL / XXL User Group : [https://www.facebook.com/groups/KosselXXL/]

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                • 3dmntbighkerundefined
                  3dmntbighker
                  last edited by

                  No word in a month? Hoping to hear something soon dc42 🙂

                  I'm putting in an end stop sensor based filament out sensor now in my CoreXY. Can anyone tell me if there is any point in a mechanical end stop board with a few support components and an LED, as opposed to just as simple switch? I find versions of both on Thingiverse. Does it matter with a Duet board?

                  Scratch built CoreXY with Maestro
                  Heavily modified Ender 3 with Maestro
                  MPCNC work in progress with Duet WiFi

                  Phaedruxundefined 1 Reply Last reply Reply Quote 0
                  • Phaedruxundefined
                    Phaedrux Moderator @3dmntbighker
                    last edited by

                    @3dmntbighker The only thing that will matter between a simple switch and a switch with the LED is likely the high or low switching. For instance, I just installed a simple switch filament out sensor using a makerbot style endstop and it switches low. So you'll just need to set the relevant flag when you setup the command.

                    Z-Bot CoreXY Build | Thingiverse Profile

                    3dmntbighkerundefined 1 Reply Last reply Reply Quote 0
                    • 3dmntbighkerundefined
                      3dmntbighker @Phaedrux
                      last edited by

                      @phaedrux Thanks for the info. I wondered if a plain switch with no resisters anywhere could damage the Duet. Perhaps the inputs on the Duet are well protected and debounced?

                      Scratch built CoreXY with Maestro
                      Heavily modified Ender 3 with Maestro
                      MPCNC work in progress with Duet WiFi

                      dc42undefined 1 Reply Last reply Reply Quote 0
                      • dc42undefined
                        dc42 administrators @3dmntbighker
                        last edited by

                        @3dmntbighker said in Laser filament monitor:

                        @phaedrux Thanks for the info. I wondered if a plain switch with no resisters anywhere could damage the Duet. Perhaps the inputs on the Duet are well protected and debounced?

                        Yes, the endstop inputs are.

                        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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                        • T3P3Tonyundefined
                          T3P3Tony administrators
                          last edited by

                          sorry for the delays. An update on testing is here:

                          https://forum.duet3d.com/topic/6092/laser-filament-monitor-test-results

                          www.duet3d.com

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                          • Hutch118undefined
                            Hutch118
                            last edited by Hutch118

                            This post is deleted!
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                            • punamenonundefined
                              punamenon
                              last edited by

                              Hi to everyone who is beta testing this sensor. I built upon the geometry for the housing, and modified it so that the PTFE tube can't be pulled out , and also it is split-able so that you can remove the remnant filament after the tail end has been fed past the hob gear.

                              Video explaining it here: https://youtu.be/RmZ7aJYvWLc?t=7m40s

                              .stl file here: https://www.myminifactory.com/object/3d-print-splitable-duet-laser-filament-bracket-for-bowden-tube-printers-73781

                              Phaedruxundefined 3dmntbighkerundefined 2 Replies Last reply Reply Quote 2
                              • Phaedruxundefined
                                Phaedrux Moderator @punamenon
                                last edited by

                                @punamenon That's a clever design. Nice work. Love the videos too.

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • 3dmntbighkerundefined
                                  3dmntbighker @punamenon
                                  last edited by

                                  @punamenon said in Laser filament monitor:

                                  Hi to everyone who is beta testing this sensor. I built upon the geometry for the housing, and modified it so that the PTFE tube can't be pulled out , and also it is split-able so that you can remove the remnant filament after the tail end has been fed past the hob gear.

                                  I'm a bit confused about having the sensor after the extruder. So you are relying solely on filament movement detection for both jams and out of filament conditions? Obviously once the hob stops pushing you will always still have filament present in the sensor. Just no movement. Mine is direct drive so this is purely my curiosity. I want a QuadFusion CMYK head eventually, so my filament detection will be a whole different worm can.

                                  Scratch built CoreXY with Maestro
                                  Heavily modified Ender 3 with Maestro
                                  MPCNC work in progress with Duet WiFi

                                  brunofportoundefined 1 Reply Last reply Reply Quote 0
                                  • brunofportoundefined
                                    brunofporto @3dmntbighker
                                    last edited by

                                    @3dmntbighker said in Laser filament monitor:

                                    @punamenon said in Laser filament monitor:

                                    Hi to everyone who is beta testing this sensor. I built upon the geometry for the housing, and modified it so that the PTFE tube can't be pulled out , and also it is split-able so that you can remove the remnant filament after the tail end has been fed past the hob gear.

                                    I'm a bit confused about having the sensor after the extruder. So you are relying solely on filament movement detection for both jams and out of filament conditions? Obviously once the hob stops pushing you will always still have filament present in the sensor. Just no movement. Mine is direct drive so this is purely my curiosity. I want a QuadFusion CMYK head eventually, so my filament detection will be a whole different worm can.

                                    I would install it after the extruder too so it can read the texture made by the hob gear even with difficult to read materials.

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

                                      One disadvantage of installing the filament monitor after the extruder drive is that there is an increased risk of filament dust contaminating the image sensor, especially after there has been a jam and some filament had been ground up.

                                      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

                                      brunofportoundefined 1 Reply Last reply Reply Quote 1
                                      • punamenonundefined
                                        punamenon
                                        last edited by

                                        @dc42 said in Laser filament monitor:

                                        One disadvantage of installing the filament monitor after the extruder drive is that there is an increased risk of filament dust contaminating the image sensor, especially after there has been a jam and some filament had been ground up.

                                        A good point! What about a redesign so that when you split it apart, you can access the sensor with a cotton swab? Would repeated wiping damage the sensor?

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                                        • brunofportoundefined
                                          brunofporto @dc42
                                          last edited by

                                          @dc42 That is is true.....

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                                          • celulariundefined
                                            celulari @dc42
                                            last edited by celulari

                                            @dc42 said in Laser filament monitor:

                                            Today I've been trying out a laser optical sensor to see if it is accurate enough to use instead of the rotating magnet sensor we use in the beta test filament monitors. The good new is that in tests with several different filaments including black and transparent, first indications are that it works adequately, provided that the filament position is sufficiently well constrained. So we will go ahead with making prototypes. We may have a very small number (between 2 and 4) available for beta testers

                                            This does however mean that production of filament monitors to the existing design is on hold until the prototypes are ready and tested, so that we can make an informed decision on which design to use.

                                            The laser filament monitor would have a much simpler housing design. Basically it just needs to clamp PTFE tubes on the inlet and the outlet, to ensure that the filament is constrained to be in the centre of the field of view of the sensor.

                                            Is the filament monitor available for purchase?

                                            Thanks.

                                            Phaedruxundefined 1 Reply Last reply Reply Quote 0
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