60th birthday clock

[CSI]

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

Centres layout dxf so helpful in creating the frame

Used a synchronous 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.

[tweakie]

Excellent work.

Tweakie.

[TOTALLYRC]

Well done,
I hope he likes it.

Mike

[BobL]

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

[steve323]

That is really cool.

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

Steve

[CSI]

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.&nbsp; I have printed a sheet on its construction and calculations so he can see how it was made.&nbsp; I am now thinking of making a similar one with an escapement and pendulum

[CSI]

That is really cool.

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

Steve

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

Regards
Jonathan