Page Comparison

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When attempting to make our final design, we initially lasercut our linkage system out of 1/4" acrylic and used a lower torque rated NEMA 17 stepper motor. We soon discovered that our motor was unable to drive our mechanism due to our motor not having enough torque as well as our linkage mechanism being too heavy. Knowing this was the reason our mechanism wasn't moving, we lightweighted decreased the weight of our linkages by using 1/8" acrylic instead, and using a higher torque rated NEMA 17 stepper motor. 

Final Design

By lightweighting reducing the weight of our acrylic linkages by cutting down its thickness by half and using a higher torque rated motor, our mechanism drove accordingly. We also opted instead of using sticky tack to hold the card to design a small part instead. This part was toleranced accordingly, so that it had enough friction to hold the card, but was smooth enough that given enough velocity the card would flick out of the mechanism. The other side was toleranced, so that it would pressfit into the link it was attached to.

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