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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.
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.
Yeah I think you need to make it lighter?
Using the mechanical advantage for this would be for someone pulling on the rope to be able to lift a weight easier.
Your pen is the one pulling and counterweight is the weight, so you would need more counter weight or lighter weights on the pin. But too light would have its own tensions problems….
Yes, you're right, don't know why I flipped that in my head, it's pretty clear on the diagram you sent me.