Jump to content

Old Medana...eratic timekeeper!

RichParker
 Share

Recommended Posts

RichParker Member

RichParker

Posted
  • Author
Posted

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

Posted
  • Author
Posted
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.

  • Like 1
RichParker Member

RichParker

Posted
  • Author
Posted
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

Posted
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

 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • RichardHarris123
      Oldhippy

      By RichardHarris123 · Posted

      @oldhippy, hasn't been on since the 14th of April, I messaged him nine days ago, no reply.  I  hope he's on an around the world trip with endless booze and supermodels.   joking apart, I  hope he's alright. Does anyone know anything? 
    • mbwatch
      A lathe with indexing that won't break the bank?

      By mbwatch · Posted

      Some of the older American companies did at least claim to manufacture them so reliably that any one of their tailstocks should perfectly center any one of their headstocks. But it would take probably someone like nickelsilver to verify that in a big enough collection.
    • tomh207
      A lathe with indexing that won't break the bank?

      By tomh207 · Posted

      You also have another potential issue with head and tail stocks, in my research it would seem that for the American style lathes the head and tail stocks were bored as a pair. So a matched pair is good a “pair “ made up from two different lathes cause some headaches. The Swiss Geneva style lathes are much lighter but were apparently made to fit any lathe. I have seen mention of being able to shim the tailstock as well to true up. indexing is again not so straightforward for a watchmaker lathe, at least not as I have found so far. Often a lathe will come with basic indexing which is limited to 60 positions. The full index plates do come up at times for eywatering prices. It is very possible to do that electronically. As well as what @SwissSeiko maybe able to point you to have a look here. https://imakewatches.com/projects/CNCIndexDriver.html   https://imakewatches.com/projects/MillingAttachment.html   Tom
    • JohnR725
      A lathe with indexing that won't break the bank?

      By JohnR725 · Posted

      On a watch repair discussion group that you know that we love to see naked watches out of the case you show us a box? I think a book on watchmakers lathes should be helpful.   The watchmakers' lathe, its use and abuse; a story of the lathe in its various forms, past and present, its construction and proper uses by     Goodrich, Ward L https://archive.org/details/watchmakerslathe00good  
    • coreymsnow
      A lathe with indexing that won't break the bank?

      By coreymsnow · Posted

      Got it. So a WW lathe will have that graduated drive pulley for different speeds and similar setup for the bed and tailstock, but they won't be fully compatible with one another in terms of parts. Thanks! The picture helps a lot.
×
×
  • Create New...