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Offline ART

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My Clock
« on: November 10, 2009, 09:57:39 AM »
Hi Guys:

  I figured someone might like to see my clock.. soemthing I decided to try and ended up spending 3 weeks obsessing on. :-)

Art
Re: My Clock
« Reply #1 on: November 10, 2009, 10:24:01 AM »
Hello Art

Real nice clock

Marcel Beaudry

Offline BarryB

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Re: My Clock
« Reply #2 on: November 10, 2009, 10:29:47 AM »
very nice Art, Did you start with plans for something like this?  Looks really complicated.

Offline ART

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Re: My Clock
« Reply #3 on: November 10, 2009, 12:13:34 PM »
Hi Guys:

  Its not that hard. I kinda did it on the fly just making the gears and attaching them to a poplar board.
Theres a program called involute that can instanly give you cnc code for the gears, so I picked the number of
teeth I needed, and made up a bunch of gears. Then I attached them to a baord, maked the holes, copied that
to cad and designed a bunch of cutouts on the board.

  Designing the pallet for the escape wheel was the only part you need to study up on..

Anyone wants the Gcode I have most of it laying around for all the gears and such..

Art
Re: My Clock
« Reply #4 on: November 10, 2009, 02:22:53 PM »
I really like it. Looks great.  8)
Is it a little after 3 o'clock?

Offline Dan13

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Re: My Clock
« Reply #5 on: November 10, 2009, 03:12:18 PM »
Art,

I am glad you're having fun. The clock looks real good.

Is it a weight hanging down there that triggers the clock?

Still looks complicated to me calculating all the gear ratios required ;)


Thanks for showing,

Daniel

Offline ART

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Re: My Clock
« Reply #6 on: November 10, 2009, 07:10:58 PM »
Hi Guys:

 Yup, 3:16 or so..

 Theres a weight box hanging down below, that weight is strung to a wooden pulley on a wooden ratchet.

Gears are pretty easy , deadbeat gear is a 30 tooth wheel with an 8 tooth pinion. That turns a 64 tooth with an 8 tooth pinion, and that turns a 60 tooth. ( that will now rotate once per minute with a 43" pendulum , so thats the minute hand).  On that shaft an 8 tooth drives a 24 tooth wheel with a 10 tooth pinion that driver a 30 tooth hour hand shaft.

  Thats about all you need really. Theres lots of web pages out there to show how escapements work..

Later.

Art

Offline RICH

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Re: My Clock
« Reply #7 on: November 10, 2009, 08:17:33 PM »
ART,
About time you get to play around some. It is rather unique and i like it.
Don't know much about clock's so only one question.
Where is the coo-coo ? In Lithuiania we mount then on the counter weight.  ;)
RICH

Offline ART

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Re: My Clock
« Reply #8 on: November 10, 2009, 09:20:06 PM »
Rich:

  :)

  Originally, my plan was to have an eyeball that flicked back and forth as my "cuckoo" , this thing taught me something about friction though. LOL

 Since the weight is hung on the minute shaft, by the time we get to the escape wheel you have 1/3600 of the original torque. A 10 pound weight then pushes about
an ounce or so on the end teeth to keep the pendulum going.. 

 Yeah, it was fun to try out the new workshop on something like a clock.. looks so damn simple but has lots to bite you with..

 Im thinking up a new challenge for the next project. :)

Art

Offline Tweakie.CNC

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Re: My Clock
« Reply #9 on: November 11, 2009, 03:25:40 AM »
Really nice clock Art. Does it have a satisfying tick ?.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.