Abacus drive V0 & V1

youmagine

I came across a fascinating design by SRI International on hackaday for a gearbox that really caught my attention, and I had to understand the underlying principle (see links). To do so, I recreated the design myself. I haven't printed it yet but plan to use my Ultimaker 3. As far as I know, the patent status is unclear, but this design is certainly intriguing regardless. Feel free to print it and share your thoughts; I'm eager to get this design working properly. http://hackaday.com/2016/12/02/abacus-drive-is-a-speed-to-torque-game-changer/ Revision Log: V0: - It was designed with two 16*8*8 bearings in mind, which would provide a smooth movement. - Of course, I included the source files so feel free to make adjustments (sorry for the rough modeling this time). V1 - The design is now tailored to fit two 16*8*8 bearings, one on top and one at the bottom. - Instead of using 8mm balls, seven 8mm balls are used (because I had these spare from an old bearing). - The overall size has been reduced for faster printing. - The space between balls and housing is now increased to 0.4mm (previously 0.3mm).