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catena clock Answered

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i saw this online, is it possible to do this with a quartz movement from a craft sore????

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golddigger1559 (author)2011-10-28
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banassef (author)golddigger15592014-07-17

Should I abanden all hope of this?

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wengyan (author)golddigger15592012-02-01

When is the instruct coming out. I would love to build one too. Looking at some synchronous motor now. What motor are you using dude..

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kelseymh (author)golddigger15592012-01-12

Where is it? Your two pictures above were great; it would be nice to know how you solved this (including the math!).

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Leeward A. (author)2012-01-10

Yes,you maybe can get by with a "heavy duty" quartz works to run the chain..mainly the weight needs to be held of course. Friction on the plastic gears of quartz works and the deformation of plastic parts from additional weight due to the size of hands or materials changes outside of design specs can lead to works failure at some point.
I know Ive seen many regular quartz with "factory" hands die within a year or two.

The life of the quartz clock works considering poor quality of some of them nowdays would be questionable if under stress for very long.

I can visualize how you could use the quartz to drive another fixed pinion/gear and that would take the direct stress off the movement and the weight goes on the fixed pinion and bearings would make it even smoother. :)
but the more friction points the more drag on the available power of course.

An AC electric works from Hansen would of course be quite adequate if considering a more powerful setup. They have an advertising clock works that is about 30-40 $. Timesavers,Inc in AZ. used to have them.

I worked on a outdoor bank clock from the 50's and it had a very cool designed movement that used TWO of the same motors, but it had a steel minute hand that was about 16-18" long and it had a heavy hour hand also...that is a lot of weight hanging on a handshaft causing extra friction..but it was counter balanced on each hand with small steel weights.

Great thing ya built though. Cheers :)

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thanks for the info :D ill look into that. and thanks for the wealth of information :p

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golddigger1559 (author)2011-10-28

SUCCESS! using only 10$ of materials and 2 hours of math, and fab i have made a 2000 dollar clock

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i should mention that the original creator charges $2,3220 for one of these.

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Kiteman (author)2011-10-28

I would say "yes", as long as the chain is plastic.

Otherwise, you'd need a stepper motor controlled by, say, an Arduino.

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Goodhart (author)Kiteman2011-10-28

or some really well engineered gearing to step it down "just so". :-)

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