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Speed adjustment

stushug

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Apr 19, 2009
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Hello Gentlemen,
I have another issue to solve. I have two table clocks with platform escapements I just cleaned and oiled and re-assembled. The first one is a jeweled movement and was running extremely fast when I took it apart. I cleaned the movement in my ultrasonic cleaner, and made myself other problems by dissolving the shellac holding the jewels in place in the pallet fork. I posted that in another thread, and you guys helped me solve that problem. Now that it's back together, it still runs extremely fast. It gained about 45 minutes in 8 hours. I tried to adjust it using the +/- and it seems to have no effect. Any ideas? The second one is a simple brass movement that is having the opposite problem, running too slow. This one loses about 3 minutes per hour, and the +/- seems to have no effect. This movement was also taken apart, it had a broken click spring when I got it, so I don't know how it ran previously. I have gone over both movements and there don't seem to be any issues like bad pivots or bushings. Any help is appreciated. Thanks.
The first pics are of the jeweled movement, the others the brass. They are the movements in various states of assembly, for reference. They are not representative of how they look currently.

DSC02213.jpg DSC02222.jpg DSC01029.jpg DSC01036.jpg
 

shutterbug

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The first one appears to have a couple of the spring loops touching. That will throw things off. Did you demagnetize the balances?
 

stushug

NAWCC Member
Apr 19, 2009
208
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Pittsburgh, PA
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The first one appears to have a couple of the spring loops touching. That will throw things off. Did you demagnetize the balances?

No, I did not. I have never heard of that. I have an old head de-magnetizer for audio equipment, could I use that? Should I do that to both movements? The jeweled one looks to have a steel hairspring, but the brass one looks like the spring is copper?
 

shutterbug

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Wouldn't hurt. Try to protect the springs from distorting during the process. Your best bet is an electrical demagnetizer. There was a recent thread on some interesting home made types. Use search.

Here, I found an interesting one you could build. Click Here
 

stushug

NAWCC Member
Apr 19, 2009
208
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Pittsburgh, PA
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Here is a pic of my demagnetizer. It worked really well for tape heads, do you think it's strong enough to work on the hairsprings? I also have an old solder gun like shown, I could adapt it like the pictures in the thread you linked to. Do I have to disassemble the movements to do this or can I do it while the springs are in place? What needs to be done to protect the springs?
Sorry for so many questions.
demagnetizer.jpg
 

stushug

NAWCC Member
Apr 19, 2009
208
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18
Pittsburgh, PA
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Shutterbug,
I used my demagnetizer, then I checked each spring to make sure they were operating freely. I found both springs were binding slightly, and as you mentioned the one had a few loops touching. I corrected?(hopefully) those problems, and will now let them run and see what happens. Thank you for the help.
 

shutterbug

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Let us know how it affects the timing issues :)
 

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