Mechanical Counter
grabcad
Mechanical Counter: I was intrigued by how mechanical counters functioned, and discovered they were simpler and more elegant than I imagined. Afterward, I designed a 3D printable counter that uses three number reels to count up to 999. This design includes a lost motion gear pair between each reel, allowing for smooth operation after one complete revolution of the lower digit reel. It is inspired by Matthias Wandel's model (http://woodgears.ca/counter/index.html), but features changes for 3D printing and a simplified actuator mechanism for easy push operation. Further instructions can be found here (http://www.3dprinterclocks.com/page23.html).
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