by lothar22, published
Changed the pitch of the screw, as it was too steep for the stepper.
Video of bicep (and hand) in action.
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Didn't lose or gain anything on retraction. Just can't extend fully, but it's not much at all, maybe a few degrees.
Still working on the software. My mad scientist friend is coding it from the ground up. He built the printer board from scratch, starting with an ARM microcontroller and a breadboard. Steppers are NEMA 17.
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