3D printed mechanical Clock with Anchor Escapement

Prints (1)

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.

Design Files

File Size

Winding_Planet_Ring_Gear_v1.stl
297 KB
Winding_Planet_Ring_Gear_v2.stl
318 KB
Winding_Planet_Sun_Gear_for_Crank.stl
336 KB
Winding_Planet_Crank_Shaft_Gear.stl
105 KB
Winding_Drum_with_Ratchet.stl
181 KB
Gear_Wheel_Seconds.stl
145 KB
Frame_Back.stl
520 KB
Clock_Face_Background.stl
2.79 MB
Clock_Face_Hand_Second.stl
55 KB
Crank_Gear_Reduction.stl
67.5 KB
Crank_Handle_Screw.stl
43.1 KB
Weight_Pulley_Hook.stl
42.3 KB
Crank_Shaft.stl
68.2 KB
Clock_Face_Hand_Minute.stl
42.5 KB
Escapement_Anchor.stl
39.1 KB
Frame_Cord_Mount.stl
79 KB
Frame_Front.stl
456 KB
Gear_Reduction_Minutes_to_Hours.stl
201 KB
Gear_Wheel_Minutes.stl
198 KB
Weight_Bucket.stl
80.1 KB
Weight_Pulley_A.stl
62.1 KB
Winding_Gear_Pawl_V2.stl
242 KB
Winding_Gear_Transmission_V2.stl
105 KB
Winding_Gear_Crank.stl
296 KB
Winding_Planet_Carrier_Cover.stl
223 KB
Winding_Planets.stl
113 KB
Winding_Planet_Roller_Bearing.stl
469 KB
Winding_Planet_Carrier_Drum.stl
181 KB
Winding_Planet_Pawl.stl
105 KB
Winding_Gear_Transmission.stl
176 KB
Winding_Gear_Pawl.stl
228 KB
Weight_Bucket_Cover.stl
48.5 KB
Gear_Wheel_Hours.stl
149 KB
Gear_Reduction_Seconds_to_Minutes.stl
167 KB
Escapement_Wheel.stl
115 KB
Escapement_Balance.stl
305 KB
Clock_Face_Hand_Hour.stl
44 KB
Clock_Face_Tickmarks.stl
586 KB
Weight_Pulley_B.stl
41.1 KB
Escapement_Spring.stl
439 KB
Crank_Handle.stl
35.2 KB

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