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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.
... Would that be a seismograph?
Im afraid it would just be a thing that makes perfectly straight lines :(
That you couldn't see, since they'd have no thickness, only length
Maybe a printer that adds Morse code on a string.
That's still 2 dimensions.