This is an educational clock to teach the analogue clock.
Also interesting for lovers of clockworks or gearboxes ;)

Completely printed without supports, no need for glue or screws either!
Also fits onto the Prusa mini (:

The hour- and minute hands are connected with a two-staged planetary geared clockwork on the back of the clock. Therefore they move in the correct ratio of 1:12. For a full turn of the minute hand, the hour hand will move one hour.
This can be done by directly moving the minute hand with a finger, or for a better view onto the clock face, by turning the grip on the backside of the clock.

Print specifications of the example in the pictures:

PLA, 0.2mm layer height
2 perimeters, 20% infill
about 20 hours total print time (normal print mode, with same colour separation as in the pictures, could be faster or slower with more or less filament colours)

Assembly:

Print all parts
Amount of needed parts is in the notes of the files.
Step 1:
slide the connection pins through the holes of the clock_body and attach the clock_face.
make sure the “12” points towards the upward pin. Then slide the hour and minute hand through the middle hole and make sure both hands point towards “12”.

Step 2:
Place the partly assembled clock with the clock face onto the desk. Make sure that both hands still point towards “12”. Then attach the A_planet_carrier onto the hour_hand.
There is a little triangle engraved into the A_planet_carrier. All triangles of all parts must be installed pointing upwards toward “12”

Step 3:
Install the A_gear_ring and the A_sun_gear, both with the triangle pointing upwards. After that install A_planet_gears.

Step 4:
Install the B_gear_gring and B_planet_carrier with the triangle pointing upwards.

Step 5
Place the B_sun_gear with the triangle pointing upwards. Then place the B_planet_gears.

Step 6
Slide the stand_back over the connection_pins and fix it with the small clips.

Step 7
Install the grip and fix it with the big clip. Then attatch the stand_bottom

Finished- have fun!

Educational clock

by Jakob · original on Printables ↗

Learning / Other 3D Objects for Learning

♥ 325⬇ 1.1k🖨 30 prints

License: Creative Commons — Attribution — Noncommercial — Share Alike ↗clockeducationalclockworkplanetarygearmechanicalclockplanetarygearsuhrplanetarygearboxeducationalprojectuhrwerk

Print profiles

stand_bottom.stl
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A_planet_carrier.stl
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stand_front.stl
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B_gear_ring.stl
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A_sun_gear.stlDEFAULT
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hour_hand.stl
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clock_body.stl
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B_planet_gear.stl
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minute_hand.stl
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clip_big.stl
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B_planet_carrier.stl
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stand_back.stl
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A_gear_ring.stl
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A_planet_gear.stl
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B_sun_gear.stl
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clock_face.stl
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group_black_filament_1.stl
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clip_small.stl
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group_black_filament_2.stl
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group_yellow_filament.stl
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connection_pins.stl
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grip.stl
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group_red_filament.stl
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group_blue_filament.stl
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group_silber_filament.stl
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