Flying Tourbillon Model 1.5

thingiverse

I finally got around to refining my first tourbillon model. For more information on the design and a brief tutorial in beginner horology, see the original at: https://www.thingiverse.com/thing:1991251. See this one in action at: https://www.youtube.com/watch?v=QvW-A2oI-O0 Changes include the following: - Safety pin to prevent mis-alignment of the fork - Spring powered (about 40s run time (or you can pretend that it's a fidget spinner and keep winding it)) - Replacing 3mm bearings with one 608 bearing so that now one must only cut 3 x 2mm shafts (I use a small piece of PLA filament to pin the balance spring in place) UPDATE 25JAN18: I added some exploded views to assist with assembly. Also, my record for runtime is now 58 seconds. UPDATE 30JAN18: I uploaded new versions of five parts with narrowed holes to support PLA filament shafts so that there isn't too much slop. All have "-PLA shaft" in their title. I have yet to test them (soon, I hope), but they use hole diameters that have worked previously with PLA shafts in my designs. If one wants to avoid metal parts entirely, (smuggling plastic tourbillons through the TSA?) here is a list of 608 bearing replacements located on Thingiverse. I have not tested these designs personally and I'm sure that there are many other suitable variants. Using 4.5mm BBs: https://www.thingiverse.com/thing:2598427 Fully printed: https://www.thingiverse.com/thing:2375580 More of a bushing but should still work (design includes STLs for different amounts of slop): https://www.thingiverse.com/thing:2482146 UPDATE 14FEB18: I got a PLA shaft version working. It does not run as smoothly as the metal shaft version due to increased plastic-on-plastic friction. Here are some observations from tuning it: -I find PLA shafts work best with the shaft locked into the rotating part with the ends spinning in the socket in the frame (individual results may vary). Be sure to sand almost hemispherical ends into the shafts. -Tolerances also needed the be tighter. If the escape wheel and the anchor shift closer together, they will lock up. - I printed all parts for my PLA shaft version on my new printer with Slic3r. Previously, using my old printer with Cura, holes came out undersized, so I incorporated offsets in all of my designs to ensure parts printed with the correct dimensions. -I usually make adjustments to the balance wheel through grub screws or by changing the infill density. I've printed this design with PLA from Hatchbox, Prusa, and AO Robotics and the springs all perform about the same. I added a stiff version of the balance spring that should provide 1.5x stiffness for more supple plastics. Please note, however, that I have not tested this spring. Thanks to all who have posted makes of this design. I've enjoyed seeing the different interpretations. 04MAR18: I posted an instructable. I hope it clarifies some issues. https://www.instructables.com/id/3D-Printed-Tourbillon/