A 3D-printable, mechanical stepper

My efforts have slowly been converging on a workable design for a 3D-printable, all-mechanical computer (with an emphasis on the word *slowly*). Inspired by this recent post I saw floating around the ‘net, I thought I would post my most recent attempt at building a fully-mechanical stepping mechanism (to replace the stepper motors used in my FIBIAC project). Eventually I will get around to integrating this with my electromechanical counter so that I have a fully mechanical counting mechanism. And video!  

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