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Multi-material filament feeder/repurpose E1 stepper driver

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Duet Hardware and wiring
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  • undefined
    fma
    last edited by 12 Oct 2018, 15:25

    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

    undefined 1 Reply Last reply 13 Oct 2018, 00:33 Reply Quote 0
    • undefined
      jckray @fma
      last edited by 13 Oct 2018, 00:33

      @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
      • undefined
        fma
        last edited by 13 Oct 2018, 06:16

        Ok, thanks.

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

        Frédéric

        undefined 1 Reply Last reply 13 Oct 2018, 21:30 Reply Quote 0
        • undefined
          jckray @fma
          last edited by 13 Oct 2018, 21:30

          @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
          • undefined
            jckray @Red Sand Robot
            last edited by 14 Oct 2018, 19:37

            @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
            • undefined
              gavatron3000
              last edited by 15 Oct 2018, 05:34

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

              undefined 1 Reply Last reply 16 Oct 2018, 16:52 Reply Quote 0
              • undefined
                jckray @gavatron3000
                last edited by 16 Oct 2018, 16:52

                @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
                • undefined
                  fma
                  last edited by 16 Oct 2018, 16:55

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

                  Frédéric

                  undefined 2 Replies Last reply 16 Oct 2018, 17:10 Reply Quote 0
                  • undefined
                    jckray @fma
                    last edited by 16 Oct 2018, 17:10

                    @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
                    • undefined
                      jckray @fma
                      last edited by 16 Oct 2018, 17:37

                      @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/

                      undefined 1 Reply Last reply 18 Oct 2018, 04:45 Reply Quote 0
                      • undefined
                        fma
                        last edited by 16 Oct 2018, 18:34

                        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

                        undefined 1 Reply Last reply 16 Oct 2018, 19:03 Reply Quote 0
                        • undefined
                          jckray @fma
                          last edited by jckray 16 Oct 2018, 19:03

                          @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
                          • undefined
                            fma
                            last edited by 17 Oct 2018, 06:26

                            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

                            undefined 1 Reply Last reply 17 Oct 2018, 17:37 Reply Quote 1
                            • undefined
                              jckray @fma
                              last edited by 17 Oct 2018, 17:37

                              @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
                              • undefined
                                fma
                                last edited by 17 Oct 2018, 21:32

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

                                Frédéric

                                1 Reply Last reply Reply Quote 0
                                • undefined
                                  Red Sand Robot @jckray
                                  last edited by 18 Oct 2018, 04:45

                                  @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

                                  undefined 1 Reply Last reply 18 Oct 2018, 20:18 Reply Quote 0
                                  • undefined
                                    jckray
                                    last edited by 18 Oct 2018, 17:48

                                    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
                                    • undefined
                                      jckray @Red Sand Robot
                                      last edited by 18 Oct 2018, 20:18

                                      @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/

                                      undefined 1 Reply Last reply 24 Oct 2018, 22:23 Reply Quote 0
                                      • undefined
                                        Red Sand Robot @jckray
                                        last edited by 24 Oct 2018, 22:23

                                        @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

                                        undefined 2 Replies Last reply 26 Oct 2018, 00:08 Reply Quote 0
                                        • undefined
                                          jckray @Red Sand Robot
                                          last edited by 26 Oct 2018, 00:08

                                          @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/

                                          1 Reply Last reply Reply Quote 0
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