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Old Medana...eratic timekeeper!

RichParker
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RichParker Member

RichParker

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I guess I was hoping for a simple fix, but you guys are all over this which is brilliant, but it's making me worried that I'll end up with an ornament that doesn't even tick!!

I'm tempted to adjust it for one position and walk around with my arm in the air all day!!

Nucejoe Distinguished Member

Nucejoe

Posted
Posted
4 minutes ago, RichParker said:

Ok, So my last post was incorrect.

I had best leave it then.

The wheel is a bit wonky isn't it! Maybe it's out of balance? This is all way beyond me and my capabilities tbh.

Not if you have the right tool. 

RichParker Member

RichParker

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1 minute ago, Nucejoe said:

Not if you have the right tool. 

I mean....I have other similar wheels from other broken watches, but swaping things around would require the right tools for sure

JohnR725 Distinguished Member

JohnR725

Posted
Posted

I would tend to leave well enough alone. Putting a cylinder balance wheel in a truing caliper you going to have issues. If you break the cylinder it's going to be really fun to try to replace that and fun really isn't quite the right word. That's a cast balance wheel it wasn't machined. It probably had some machining but? I was trying to avoid this this is not a real high quality watch if the hands move and keeps time within minutes per day you should be happy.

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RichParker Member

RichParker

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41 minutes ago, JohnR725 said:

I would tend to leave well enough alone. Putting a cylinder balance wheel in a truing caliper you going to have issues. If you break the cylinder it's going to be really fun to try to replace that and fun really isn't quite the right word. That's a cast balance wheel it wasn't machined. It probably had some machining but? I was trying to avoid this this is not a real high quality watch if the hands move and keeps time within minutes per day you should be happy.

Thanks John, I guess I know my level of 'expertise' and limitations, so I think you're spot on.....I will leave well alone and accept a few minutes. And you're right also in that it doesn't look great quality in truth, so I shouldn't expect too much, especially with its undoubted age and wear.

Cheers guys, great to get your thoughts and to tap into that knowledge. One thing I've learned since I started dabbling and tinkering......this little corner of the world is colossal!!!

watchweasol Distinguished Member

watchweasol

Posted
Posted

I would certainly agree with JohnR regarding the regulator. I have seen these single pin regulators before but only on old cylinder movements, the spring rests on the pin and effectivly shortens/lengthens the spring when the regulator is moved as far as I remember it doesn't  beat  between the pins.

Marc Distinguished Member

Marc

Posted
Posted (edited)
42 minutes ago, watchweasol said:

I have seen these single pin regulators before but only on old cylinder movements

This is a more common design than you may think.

Taken from the Timex service manual....

Inked20210319_115149_LI.thumb.jpg.4b61f1074e8cb4e93f83550ba630e1a5.jpg

Edited by Marc
typo
watchweasol Distinguished Member

watchweasol

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Posted

Hi  Thanks for that Marc, Indeed although not a single pin in the true sense of the word the principal of constant contact is the same, and has the same effect.  cheers

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