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Author Topic: 60th birthday clock  (Read 1045 times)
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CSI
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« on: February 04, 2018, 07:43:11 AM »

Hi I have finished creating with gearotics a clock for my friend.  Designed the ratios using a spreadshe ed drew the frame with draftsigh t, cut the acrylic with my laser cutter.  Keeps good time (< 1 minute in three weeks) and will be giving it to my friend in a week.  Really enjoyed the project, all brass component s were made on my lathe.

Centres layout dxf so helpful in creating the frame

Used a synchrono us motor at 1 rpm for my UK 50hz mains, found it hard to source a 50hz but could have used a 60hz and adjusted the ratios.



* leon clock 1.jpg (359.68 KB, 1426x1902 - viewed 193 times.)

* leon clock 2.jpg (297.55 KB, 1372x1830 - viewed 164 times.)

* leon clock 3.jpg (393.45 KB, 1030x1830 - viewed 158 times.)
« Last Edit: February 08, 2018, 04:57:48 PM by CSI » Logged
tweakie
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« Reply #1 on: February 04, 2018, 11:08:00 AM »

Excellent work.

Tweakie.
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TOTALLYRC
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« Reply #2 on: February 04, 2018, 08:35:00 PM »

Well done,
I hope he likes it.

Mike
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BobL
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« Reply #3 on: February 05, 2018, 07:36:42 PM »

Nicely done CSI, awesome job and thanks do much for sharing.

 
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steve323
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« Reply #4 on: February 07, 2018, 07:42:35 PM »

That is really cool.

I think that a synchrono us motor counts line frequency, so the long term accuracy should be nearly perfect.

Steve
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CSI
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« Reply #5 on: February 08, 2018, 04:45:37 PM »

Nicely done CSI, awesome job and thanks do much for sharing.

 

Thank you, I am really pleased with how it has turned out, looking forward to giving it to my friend later this week.  I have printed a sheet on its construct ion and calculati ons so he can see how it was made.  I am now thinking of making a similar one with an escapemen t and pendulum
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CSI
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« Reply #6 on: February 08, 2018, 04:48:18 PM »

That is really cool.

I think that a synchrono us motor counts line frequency, so the long term accuracy should be nearly perfect.

Steve

Hi, Steve, you are absolutel y correct. The motor does use mains frequency and consequen tly it is very accurate.  I have been running it for three weeks now and it is still spot on.  Which is a very different place for me for my pendulum clock I built in the past.

Regards
Jonathan
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