The Retrograde Mechanism

myminifactory

The Retrograde Mechanism is found in most mid to high end mechanical watches where the pointer only sweeps through small angle instead of a full revolution. The pointer jumps back to its initial position after making a full angle sweep. This is a simplified version made 3D printable to illusrate how it works.   Assembly Video: https://youtu.be/1HozfIwFNjo Links to the hardwares that i used: 1.5mm and 2.0mm pins (I used ejector pin shafts that is cut down to length using a dremel with diamond disc cutter) https://www.aliexpress.com/item/32915349219.html?spm=a2g0s.9042311.0.0.4a8a4c4dJPLrde https://www.aliexpress.com/item/32916012981.html?spm=a2g0o.detail.1000060.1.e6dd3e83PvK1pS&gps-id=pcDetailBottomMoreThisSeller&scm=1007.13339.146401.0&scm_id=1007.13339.146401.0&scm-url=1007.13339.146401.0&pvid=16351f4b-6743-4421-bec8-1c3a81075836&_t=gps-id:pcDetailBottomMoreThisSeller,scm-url:1007.13339.146401.0,pvid:16351f4b-6743-4421-bec8-1c3a81075836,tpp_buckets:668%230%23131923%2320_668%23808%233772%23946_668%23888%233325%239_668%232846%238111%23409_668%232717%237564%23651 M2 Screws https://www.aliexpress.com/item/32810872544.html?spm=a2g0s.9042311.0.0.3d2e4c4dIpyhiK Dremel Diamond Disc Cutter https://www.amazon.com/Diamond-Cutting-Mandrel-Screwdriver-MoArmor/dp/B0714PNJRG/ref=sr_1_2?dchild=1&keywords=dremel+diamond+disk&qid=1591504416&sr=8-2