Description
This mechanical clock demonstrates that 3d-printing is not just for decoration. It's possible to create intelligent, living things. The clock has an anchor escapement, and a balance-wheel with a spiral spring. The clock shows Seconds, Minutes, and Hours. The winding has a nested planetary gear, which allows that the clock continues to run, while winding up.
Everything is 3d-printed (even the spiral spring), except e few small screws, some metal pins, the cord, and the lead for the weight. This video shows the clock and the building process (actually with a simpler ratchet-winding):
Video demonstrating the clock (incl. assembly): http://youtu.be/HgZBPYJ2Y-w
Designed with Blender. PLA printed with Rapman 3.2.
Some parts require a loose clearance (hollow shaft for hours and minutes), other parts require a press fit (hands). The 3d-files are optimised for older printers with more inaccuracy in xy, or a badly guided z axis. I.e. when printed with a newer generation printer, parts are most likely too loose. In order to compensate this, the material flow could be increased (overextrusion). In Simplify3d there is another useful parameter: "process settings / advanced / other / horizontal size compensation".
Pins:
- 1 x Balance wheel: 1.5mm diameter, 40mm length
- 1 x Escape wheel: 2.0mm diameter, 28mm length
- 1 x Reduction gears: 2.0mm diameter, 60mm length
- 1 x Drum Transmission: 3.0mm diameter, 60mm length
- 1 x Drum Axis: 3.0mm diameter, 60mm length
- 1 x Crank transmission: 3.0mm diameter, 30mm length
- 4 x Planets Axis: 3.0mm diameter, 39mm length
- 1 x Weight Axis: 3.0mm diameter, 15mm length
Screws:
- 6 x Frame: M3, 12mm, Flat Head
- 5 x Winding Drum: M3, 10mm, Flat Head
There are STL-versions with 2 x 2 combinations for the winding:
a) Simple Ratchet v1: 4.22 revolutions per hour (weight moves 26.5cm/h)
b) Simple Ratchet v2: 2.25 revolutions per hour (weight moves 14.1cm/h)
c) Planetary Drum v1: 3.01 revolutions per hour (weight moves 18.9cm/h)
d) Planetary Drum v2: 1.61 revolutions per hour (weight moves 10.1cm/h)
My clock works well with version c) and 1.2kg weight. For version d) I'd probably need a weight of 2.3kg. The actual needed weight depends a lot on the friction of the whole system.
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Comments (15)
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Looks good Goofy - but i cant downlaod it...plus i have a new Creality Ender 3 V3 SE and based on comments below I will need to modify your original design to make it fit togther properly. So a bit more techincal advcie required on both fronts before I give it a shot...please. C
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Just amazing! I watched the video and it was awesome. I'm new to 3D printing. I can only dream of achieving what you've done.
dear mr. goofy. I tried to prinr out this great clock in version Simple Ratchet v2 but unfortunately after 2-3 round of a Escapement_Balance_wheel all stop. i tried to increase weight but no effect. do you have any kinf of idea?? thanks
great work.. I was wondering what is the period of the balance spring? How did you get it right? trial and error or is there some way of calculating it?
I am a mechanical clock nut. I would like to make a 400 day anniversary clock some time based on the real ones. Kundo is the best known brand of the real ones. The 400 day clocks do not use a main spring. They turn one way , then the other on a twisting pendulum. They are all over ebay.
Thanks for another awesome design Mr goofy
great job ! very good clock
What's the duration of the spring? nice model btw.
After 3 years the hairspring is still working. However most of the time it wasn't in motion. I had expected it will break as soon as I re-wind the clock, because PLA is very brittle, and the material is just ageing independent of it's use.
Is beautiful, my father was a watchmaker and never knew the 3d impression. This would have seemed incredible. I'm going to print your models. Thank you for sharing them. Sorry for my english I am from Argentina.