I upgraded two Prusa MK3s to MK3.9, and ended up with a couple of spare boards, stepper motors and a bunch of other things. So I decided to turn them into a Makelangelo clone!

Since the school I work at had these large standing whiteboards, I designed and printed corner brackets to hold the motors, as well as a base for the electronics.

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I’m still having trouble with the homing process, but very happy with the results so far!

I’ll be posting the firmware and 3d printed files online soon.

  • anguoOPEnglish
    2·
    9 months ago

    Hmmm, only if a second pulley was higher than the motor, I imagine.

    • SchmidtGenetics@lemmy.worldEnglish
      2·
      9 months ago

      You can use multiple pulleys and shackles to take the distance of the rope up.

      It’s how they do it inside of machines as far as I’ve seen.

      • anguoOPEnglish
        2·
        9 months ago

        I still feel the distance they travel will stay the same. Except if I use a gear train.

          • anguoOPEnglish
            2·
            9 months ago

            Ah yes, different sized pulleys would work the same as the gear train I had in mind. Thanks for the explanation!

            Edit: on second look, it’s more complex than that, as the weight is not connected to the end of the rope, but on a pulley.

            • SchmidtGenetics@lemmy.worldEnglish
              2·
              9 months ago

              Likely number 2 would be enough, would double the distance itself. You just need to attach it to the same corner bracket and have a pulley with the weight under it.

              • anguoOPEnglish
                2·
                9 months ago

                Yes. I would need to increase the weight on the pen too, though.

                  • anguoOPEnglish
                    1·
                    9 months ago

                    I feel they’re too light already 😅