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Harmonic drive? Boy. Another project to sidetrack..

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  • #16
    Actually starting to build something.,..

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    • #17
      another update

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      • #18
        Nice work. Really coming together now. Any durability issues with the flex gear yet, or have you not ran it enough to find out?

        I'm going to be building a 4th axis drive in the next couple months too and might follow your lead. I want a through bore though, so that will present it's own set of challenges.......

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        • #19
          If this works decent - I have some ideas for through hole.. I don't like that the stepper is sticking out the back - that makes it so I cannot stick the rotary axis vertical. I would want to create a wave generator assembly that is hollow and run it with a belt. Then the servo/stepper could be off to the side facing the other direction.

          version 3 maybe

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          • #20
            Great job! Following with interest. I've looked at the used ones on ebay before.
            Just haven't pulled the trigger yet.
            olf20 / Bob

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            • #21
              Originally posted by skunkworks View Post
              If this works decent - I have some ideas for through hole.. I don't like that the stepper is sticking out the back - that makes it so I cannot stick the rotary axis vertical. I would want to create a wave generator assembly that is hollow and run it with a belt. Then the servo/stepper could be off to the side facing the other direction.

              version 3 maybe
              If I could find a 40mm hollow stepper that would be perfect, but I'd take 30. A belt would probably be the easiest (and cheapest) option though. Kind of a shame to lose the direct drive benefits of a harmonic drive, by introducing some potential backlash with a belt, but beggars can't be choosers sometimes.

              I have a product in mind that I want to run mill turn style from 1" bar stock. It might be scalable to 1.5" too, that's why the weird requirements.

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              • #22
                I think this is wonderfully inspiring. The true worth of a 3d printer shining through 👍👍👍
                Peter - novice home machinist, modern motorcycle enthusiast.

                Denford Viceroy 280 Synchro (11 x 24)
                Herbert 0V adapted to R8 by 'Sir John'.
                Monarch 10EE 1942

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                • #23
                  another update....

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