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Old 7th Nov 2017, 11:28 am   #1
yesnaby
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Default Mains synchronous clock movement

Hello,

My mains synchronous clock (made in woodwork class half a century ago) has stopped working. I think the motor coil has gone open circuit.

There is only one place that sells the motor, but unfortunately they are trade only!

See

https://www.cousinsuk.com/product/ma...ous?code=M7814

Note: this has to fit a panel 11 mm thick, there are other ones I can get for a 5 mm panel: however, the construction of the clock makes these unusable.

Perhaps I could have the coil rewound? But there may be other problems with the motor, is it worth the risk?

Or could I find a friendly clock repairer who could order for me?

Michael
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Old 7th Nov 2017, 11:43 am   #2
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Default Re: Mains synchronous clock movement

I'm sure Ed Dinning could re-wind it for you.

Or you could re-wind yourself using thicker wire and power it from a small step-down transformer: http://sound.whsites.net/clocks/ocm.html

Quote:
Originally Posted by yesnaby View Post
Or could I find a friendly clock repairer who could order for me?
I order from Cousins from time to time, though I tend to wait for the shopping list to get quite long to make the postage charges worthwhile. AFAIK, the most relevant part of their "trade only" policy is that you can't return goods ordered in error like you can usually with mail ordering.

Could you post a pic of the motor you currently have, please?

Nick.
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Old 7th Nov 2017, 11:47 am   #3
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Default Re: Mains synchronous clock movement

Hello Nick,

For Cousins, when you register with them don't you have to confirm that you are in the trade?

Michael

PS Sorry Nick, photo coming asap.
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Old 7th Nov 2017, 11:57 am   #4
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Default Re: Mains synchronous clock movement

Photos as promised
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Old 7th Nov 2017, 12:07 pm   #5
M0FYA Andy
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Default Re: Mains synchronous clock movement

Did CE marking exist half a century ago?
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Old 7th Nov 2017, 12:11 pm   #6
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Default Re: Mains synchronous clock movement

You are right, this is a replacement movement! Must be 20 years old though I can't remember exactly.
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Old 7th Nov 2017, 12:29 pm   #7
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Default Re: Mains synchronous clock movement

We have a Cousins account, we have to place an order most weeks.
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Old 7th Nov 2017, 1:55 pm   #8
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Default Re: Mains synchronous clock movement

CE marking started in 1993 replacing the EU mark.
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Old 7th Nov 2017, 2:44 pm   #9
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Default Re: Mains synchronous clock movement

Quote:
For Cousins, when you register with them don't you have to confirm that you are in the trade?
Yes you have to, but that is just a checkbox you have to tick... No proof is requested. It is only a matter of honesty I have bought stuff from them several times and I am not in the trade.
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Old 8th Nov 2017, 1:03 am   #10
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Default Re: Mains synchronous clock movement

And presumably you don't have to say exactly what trade you're a member of....... you're a "restorer"- a perfectly good trade!
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Old 8th Nov 2017, 9:42 am   #11
Phil G4SPZ
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Default Re: Mains synchronous clock movement

H S Walsh are another supplier who come recommended:

https://www.hswalsh.com/categories/mains-synchronous
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Old 8th Nov 2017, 9:50 am   #12
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Default Re: Mains synchronous clock movement

Can we have a pic. of the clock?
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Old 8th Nov 2017, 9:53 am   #13
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Default Re: Mains synchronous clock movement

Herald1360: Good point!

Phil: Unfortunately neither the CM310 nor the CM311 is suitable.

The CM310 has a maximum panel thickness of 5 mm whereas mine is 11 mm; the CM311 is too big and also has no seconds hand.

Thanks anyway!

The Cousins one (M7814) is now in stock again so I'll try to order from them.

Brigham: Yes, indeed, photo coming this morning.
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Old 8th Nov 2017, 10:03 am   #14
M0FYA Andy
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Default Re: Mains synchronous clock movement

Another approach is to rewind the motor to operate on a low voltage and add a transformer. I've previously linked here to a website which gives details, but I can't spot my posting at the moment. It makes sense because the typical coil for operation at 240v is wound with thousands of turns of fine wire, whereas rewinding for, say, 6 volts means fewer turns of thicker wire, much more manageable.

Andy
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Old 8th Nov 2017, 10:37 am   #15
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Default Re: Mains synchronous clock movement

See my link in post 2, Andy
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Old 8th Nov 2017, 12:06 pm   #16
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Default Re: Mains synchronous clock movement

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Old 8th Nov 2017, 12:11 pm   #17
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Default Re: Mains synchronous clock movement

Now that is pretty, and you made this when you were in your crib?
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Old 8th Nov 2017, 12:26 pm   #18
yesnaby
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Default Re: Mains synchronous clock movement

Age 14 I think!

Perhaps it could also do with a set of new hands ....
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Old 8th Nov 2017, 12:28 pm   #19
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Default Re: Mains synchronous clock movement

That's a lovely piece indeed, with a classic 1930s look to it.
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Old 8th Nov 2017, 3:25 pm   #20
M0FYA Andy
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Default Re: Mains synchronous clock movement

Quote:
Originally Posted by Nickthedentist View Post
See my link in post 2, Andy
Oops, I hadn't spotted that you'd already mentioned the idea.

Andy
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