This is a watch with moving and tourbillon barrel. The watch has a Swiss lever escapement. It's driven by a 3d-printed spring, and runs 35 Minutes (a cable retraction spring made from steel would function better). My opinion is operating with less than 0.5 Seconds deviation within one Minute.
The project demonstrates that the technology is developing. In comparison with earlier generations of 3d-printers, the procedure works more and more reliable .
The watch published with Ultimaker 2, and is designed with Autodesk Fusion 360.
How it's made:
Assembly Time Lapse:
Autodesk Fusion 360 Style:
Printer Brand: Ultimaker
Printer: Ultimaker 2
Resolution: Regular (cura defaults)
0.4 mm Nozzle
Only the Pawl Unlock Key has to be published with support.
Hairspring, Anchor, Escapement Wheel, and a few gears were printed with high resolution (0.06mm layer, 0.8mm shell). All other components are printed with normal resolution (0.1mm layer, 0.8mm shell).
The infill of the backbone is 80 percent so as to have a better balanced center of gravity (remainder has 30% infill).
For the case I used PETG (slightly bendable, shock absorbing), and the gears are published with PLA (harder and less friction).
For the Main Spring I switched off "combing" in Cura. Even though this is a cool feature for regular shaped components, it causes problems with large coil shaped components: The print-head does many useless long (2 meters!) travelling moves. If continuing to print, the nozzle is empty of substance, and printing not only takes it oozes throughout the move, and the is disastrous.
Printing on glass-bed that is heated. Used it to wash. Adhesion is exceptional. I poured a couple of drops of the alcohol mix to the groove between plastique and glass. The effect is miraculous without applying any force, and the component can be removed.
Ensure x- and y-axis of your printer are corrected square! My Ultimaker wasn't fabricated good enough (1-2mm slant) - the result were oval Minutes and Hours wheel, and they jammed at some angles.
Watch this movie, if you like to understand the watch is constructed.
These are all the Parts. 51 downloadable and printable, and a few Pins and Screws.
- 1 Pin, Diameter 1.5 mm, Length 55.5 mm (tourbillon axis)
- 1 Pin, Diameter 1.5 mm, Length 12 mm (anchor axis)
- 1 Pin, Diameter 1.5 mm, Length 8.5 mm (planet gear axis)
- 3 Pins, Diameter 2 mm, Length 57 mm (axis for pinions for minutes and hours wheel)
- 6 Pins, Diameter 2 mm, Length 22 mm (axis for basic transmission)
- 1 Pin, Diameter 2 mm, Length 15 mm (attachment main spring)
- 1 Pin, Diameter 3 mm, Length 22.5 mm (axis for primary spring)
1 Pin, Diameter 3 mm, Length 31 mm (axis for primary pinion)
- 3 Washers, Diameter 3 mm (main spring, pinion)
- 6 Washers, Diameter 2 mm (transmission)
5 Washers, Diameter 1.5 mm (tourbillon, escapement)
- 5 Screws, Diameter 1.8 mm, Length 6.5 mm (ratchet pawls)
- 5 inches, Diameter 1.5 mm, Length 5 mm (going barrel)
- 4 Screws, Diameter 1.5 mm, Length 10 mm (base plate)
- 4 Screws, Diameter 1.8 mm, Length 12 mm (clock face)
- 3 Fragrant, Diameter 1.5 mm, Length 10 mm (tourbillon cage)
Holes are normally not printed. Use a drill to smooth the inner surface - the Balance Wheel needs to rotate with very little, and very little friction play. If you do not find pins or screws with the recommended diameter, you may certainly use little larger pieces - there's some "meet" that can be drilled out.
Spring Barrel Assembly: Align the Barrel like in the picture. It will then slide into the situation like in the movie (2:49). The Pawl Unlock Key is a helpful tool to keep the pawls in place during this assembly step.
There is a Key. I suggest to totally unwind/relax the Main Spring, once the watch is not used. It surely will extend the life-time.
Have fun! :-)