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    My homemade MMU

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    Example setups and prints
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    • NicoLab28undefined
      NicoLab28
      last edited by NicoLab28

      https://youtu.be/cLydXt-zUXM

      Here is a video of my MMU, I already tested it in print, it works until the moment when the filaments intermingle ...
      In addition, my printer is not calibrated at all, it is always in WIP.
      So the video just shows the tools change, with the purge.

      The base of the printer is a ratrig increased in size, with lots of little tricks.
      The head support remains of the hack, because the addition of the servo at the last moment, will require a better integration. And especially to install the cutter at the lowest.

      The MMU is a mix of lots of tricks, nottamentally transplanted on the MMU Zblairq, a big thank you! And also at Gravatron3000 for its sample codes.
      This is not the final version, but everything is printed, it only remains to mount the 16 elements ...
      I used dualdrive from bondtech, because I have a long tube about 1m, it must grow.
      The scraper system, allows me to print continuously without using tricks, and especially to eliminate the limits of 6 extruders Simplify3D.

      What do you think?

      I can make the code and CAD files available if it interests someone.

      For the fact, that the filaments intermingle together, I seem to have found a solution, but if you have ideas, examples, I am!

      Edit: I forgot to thank DC42 for his help !!

      1 Reply Last reply Reply Quote 6
      • fmaundefined
        fma
        last edited by

        Super boulot !

        I'm interested with your cad files and macros!

        A few months ago, I build a similar MMU using Bondtech gears, but I had issues when engaging the gears: they often failed to engage, making a big clack! as soon as they start to turn :o/ I was about to drop this idea, but your's seems to work fine.

        About the cutter, do you evacuate the cut tip? Or does it remain in the extruder? I was thinking to put the cutter below the extruder, so the small tip remains in the hotend entry tube, then, the new filament pushes it again down in the nozzle, so no need to evacuate it.

        I'm about to install my new custom extruder, using Bondtech gears and a small Nema14 + gearbox, and start a new design of a MMU, but your's is great. The only difference is I would not put the carriage, and have a passive multiplexer, above the extruder, so it takes less time to switch, and it avoids the carriage entry. And also greatly reduces filament intermingle... So, I may tune a little bit your design with this setup.

        Thanks for sharing!

        Frédéric

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        • gavatron3000undefined
          gavatron3000
          last edited by gavatron3000

          Nice work mate!

          You might like this as it helped me also
          https://www.thingiverse.com/thing:3252111

          Also hopefully soon the firmware change with triggers in tool changes will help our mmu's

          fmaundefined NicoLab28undefined 2 Replies Last reply Reply Quote 0
          • fmaundefined
            fma @gavatron3000
            last edited by

            @gavatron3000 said in My home made MMU:

            You might like this as it helped me also
            https://www.thingiverse.com/thing:3252111

            I printed one, to test, and it works amazingly well!

            Frédéric

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            • NicoLab28undefined
              NicoLab28 @gavatron3000
              last edited by

              @gavatron3000
              I had seen, my problem is that my filaments are floating, so that would disarm them.
              I am designing a completely passive system, it seems to work, but it remains to be validated.

              Otherwise, here are the STEP and IGES files of my latest version, it's global and WIP, so you have to sort.
              https://drive.google.com/file/d/14TZ3oHOebRo_oeb77vuYRUGHIr5ooaYN/view?usp=sharing

              The triggers of the proto are slightly worked in the dremel, the files are the patches. I printed them but not tested. But I have no doubt about their smooth operation.
              They bring 3 trigger positions: (I only have 2 on the proto 1 and 2 together)

              1. rest with positioning stop, for priming.
              2. Completely free filament
              3. bowden mode
              1 Reply Last reply Reply Quote 0
              • gavatron3000undefined
                gavatron3000
                last edited by

                Mine are floating too, it doesn't pull as hard as you might think. There is also another version that you can adjust the tension the same guy designed that one also

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                • NicoLab28undefined
                  NicoLab28
                  last edited by

                  roughly, it rewinds by retracting only?
                  I had also seen the second one.

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                  • Computigerundefined
                    Computiger
                    last edited by

                    This post is deleted!
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                    • Computigerundefined
                      Computiger
                      last edited by

                      This post is deleted!
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                      • Computigerundefined
                        Computiger
                        last edited by Computiger

                        This post is deleted!
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                        • oliofundefined
                          oliof
                          last edited by

                          Looks pretty nice! I am currently eyeing the SMuFF, but that is active and not passive ...

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

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