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    Multi-material filament feeder/repurpose E1 stepper driver

    Scheduled Pinned Locked Moved
    Duet Hardware and wiring
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    • fmaundefined
      fma
      last edited by

      I get very nice tip on PLA by removing filament with this macro:

      G1 E-5 F3600
      G1 E2 F3600
      G1 E-47 F3600
      G4 P5000
      G1 E-100 F3600
      

      I'm about to test my own version of filament multiplexer, but I'm a bit lost with the configs. Would you mind sharing yours?

      Frédéric

      jckrayundefined 1 Reply Last reply Reply Quote 0
      • jckrayundefined
        jckray @fma
        last edited by

        @fma We have a fairly similar unload script, however, we are still having issues with consistency across all material types, specifically breakaway supports from E3D. I'm hoping to have updates on our progress including the config and scripts we are using some time next week. You can check our website and our Thingiverse page for updates, links below.

        https://www.hydraresearch3d.com/nautilus/
        https://www.thingiverse.com/thing:2992637

        John
        Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
        https://www.hydraresearch3d.com/

        1 Reply Last reply Reply Quote 0
        • fmaundefined
          fma
          last edited by

          Ok, thanks.

          Where does the jam occur? Between the loader and the carriage?

          Frédéric

          jckrayundefined 1 Reply Last reply Reply Quote 0
          • jckrayundefined
            jckray @fma
            last edited by

            @fma In occurs when loading the filament back in when right as the filament enters the nozzle. Some filaments, the breakaway in particular, have a slight bulge at the tip after unloading.

            John
            Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
            https://www.hydraresearch3d.com/

            1 Reply Last reply Reply Quote 0
            • jckrayundefined
              jckray @Red Sand Robot
              last edited by

              @red-sand-robot A supper rough BOM is now on our Thingiverse page along with updated files https://www.thingiverse.com/thing:2992637

              John
              Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
              https://www.hydraresearch3d.com/

              1 Reply Last reply Reply Quote 0
              • gavatron3000undefined
                gavatron3000
                last edited by

                did the knife improve reliability? ive seen the prusa mmu2 struggle with the E3d breakaway also in videos

                jckrayundefined 1 Reply Last reply Reply Quote 0
                • jckrayundefined
                  jckray @gavatron3000
                  last edited by

                  @gavatron3000 I have not tested the e3d breakaway since adding the cutting mechanism. I have had it up and running with the blade for a day and a half now. So far reliability is much better. I will let you know how the breakaway supports go once I have tested them.

                  John
                  Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                  https://www.hydraresearch3d.com/

                  1 Reply Last reply Reply Quote 0
                  • fmaundefined
                    fma
                    last edited by

                    Where did you put the cutter? On the loader carriage, as Prusa did?

                    Frédéric

                    jckrayundefined 2 Replies Last reply Reply Quote 0
                    • jckrayundefined
                      jckray @fma
                      last edited by

                      @fma Yes, it's on the carriage. I'll see if I can get some pictures.

                      John
                      Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                      https://www.hydraresearch3d.com/

                      1 Reply Last reply Reply Quote 0
                      • jckrayundefined
                        jckray @fma
                        last edited by

                        @fma the cutter is using a standard Xacto knife blade. Here are some pics2_1539711414812_IMG_0226.JPG 1_1539711414812_IMG_0225.JPG 0_1539711414809_IMG_0224.JPG

                        John
                        Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                        https://www.hydraresearch3d.com/

                        Red Sand Robotundefined 1 Reply Last reply Reply Quote 0
                        • fmaundefined
                          fma
                          last edited by

                          I'm thinking to add a cutter under the extruder. This way, cut tips stay in the hotend, and are pushed again by the new filament during the purge, so no need to evacuate them. Ideally, it would be nice to be able to cut the filament when it is still soften, above the melt chamber, but I don't think ti would be easy...

                          Frédéric

                          jckrayundefined 1 Reply Last reply Reply Quote 0
                          • jckrayundefined
                            jckray @fma
                            last edited by jckray

                            @fma No, that does not sound easy. We had to use the method we did because our tool head is pretty complex and already has a magnetic hotend cartridge system, so something like that would not fit on our tool head and would make that portion of the printer too complicated.

                            John
                            Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                            https://www.hydraresearch3d.com/

                            1 Reply Last reply Reply Quote 0
                            • fmaundefined
                              fma
                              last edited by

                              BTW, I made some quick tests cutting filament with hot wire (easy to build, with a NiCr wire + led current driver). I didn't not spend much time: it cut very well, but leaves some small borders on the tip of the filament. I need to dig further this method.

                              BTW, I'm wondering if having the nozzle drilled at 1.7mm instead of 2mm could help to avoid bad tips?

                              Frédéric

                              jckrayundefined 1 Reply Last reply Reply Quote 1
                              • jckrayundefined
                                jckray @fma
                                last edited by

                                @fma That sounds interesting, would love to hear more if you ever to any more testing.

                                Yes, I have had the same thought about the diameter of the nozzle, however, this would mean you would only be able to use expensive filament with a very good manufacturing tolerance.

                                John
                                Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                                https://www.hydraresearch3d.com/

                                1 Reply Last reply Reply Quote 0
                                • fmaundefined
                                  fma
                                  last edited by

                                  Well, I said 1.7mm, but yes, 1.8mm would be better. But not 2mm...

                                  Frédéric

                                  1 Reply Last reply Reply Quote 0
                                  • Red Sand Robotundefined
                                    Red Sand Robot @jckray
                                    last edited by

                                    @jckray

                                    Excited to see the progress on it! I for one would be interested in hardware kit, though I might try to see if it would be possible for me to fabricate some of the non printed pieces in my university's metal shop.

                                    Is everything running well on the firmware side of things?

                                    almost an engineer

                                    jckrayundefined 1 Reply Last reply Reply Quote 0
                                    • jckrayundefined
                                      jckray
                                      last edited by

                                      The firmware is running fine. We are still ironing out a few minor issues.

                                      John
                                      Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                                      https://www.hydraresearch3d.com/

                                      1 Reply Last reply Reply Quote 0
                                      • jckrayundefined
                                        jckray @Red Sand Robot
                                        last edited by

                                        @red-sand-robot Glad to hear you would be interested in a kit. We will need to see interest from more people before we would make an official kit. However, if we don't do a kit we can definitely help you out with the hard to find/custom parts if you need them.

                                        John
                                        Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                                        https://www.hydraresearch3d.com/

                                        Red Sand Robotundefined 1 Reply Last reply Reply Quote 0
                                        • Red Sand Robotundefined
                                          Red Sand Robot @jckray
                                          last edited by

                                          @jckray How much, roughly, did the NEMA 17 with the custom shaft? I have already begun printing the parts for your MMU system, so far so good!

                                          0_1540419781136_20181024_152242.jpg

                                          almost an engineer

                                          jckrayundefined 2 Replies Last reply Reply Quote 0
                                          • jckrayundefined
                                            jckray @Red Sand Robot
                                            last edited by

                                            @red-sand-robot The MOQ was 10 units, It was several hundred dollars for the whole order. I'd be happy to sell you one, so you don't have to deal with all that. I'll get the motor listed in the parts section of our website, and post here when it is there.

                                            John
                                            Founder of Hydra Research LLC, developers of the open-source 3D printers and providers of 3D printing services.
                                            https://www.hydraresearch3d.com/

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