How Does One Adjust A New 28,000 Bph 7750

[crystalcranium]

Mine is running about +45 sec/day. Thanks

[Bravo]

Mine is running about +45 sec/day. Thanks

...so is mine...

[ryaku]

...so is mine...

Jesus...

Mine is about -6 sec/day

[Usil]

Mine started out at 40 seconds fast a day. Now it is about 1 sec for every 1 to 2 days. Regulation marks (+ or -) are not present so I moved the regulator arm to lengthen or shorten it's sliding attachment point on the spring. Moving the regulator arm towards the based attachment point lengthens it, moving away and it shortens it.

Final adjustments were made in fractions of a millimeter by using a loop to see the regulator arm movement. You need a steady hand to do this.

I am not a trained person working on watches so I provide this with no guarantee and only share what I did. Hopefully experts will respond to your request.

Usil

Edited August 24, 2006 by Usil

[crystalcranium]

Mine started out at 40 seconds fast a day. Now it is about 1 sec for every 1 to 2 days. Regulation marks (+ or -) are not present so I moved the regulator arm to lengthen or shorten it's sliding attachment point on the spring. Moving the regulator arm towards the based attachment point lengthens it, moving away and it shortens it.

Final adjustments were made in fractions of a millimeter by using a loop to see the regulator arm movement. You need a steady hand to do this.

I am not a trained person working on watches so I provide this with no guarantee and only share what I did. Hopefully experts will respond to your request.

Usil

Thanks but I still don't know which one of the two "tabs" on the balance wheel to move and in which direction to slow it. Maybe if you could use this image as a reference to describe it.

[Pugwash]

The lever pointing to the left with the two blobs on is the one you move. DO NOT MOVE THE OTHER ONE.

[dachshund]

As stated, move the adjuster with the two dots on it, not the one that the single attachment.

To slow the timing, move the two dot lever closer to the single dot lever.

To speed up the timing, move the two dot lever farther away from the single dot lever.

Very little movement goes a long way, move very little at a time and recheck results.

[crystalcranium]

The lever pointing to the left with the two blobs on is the one you move. DO NOT MOVE THE OTHER ONE.

Roger that. I moved the 2 dot lever and slowed the watch to an imperceptable change over 1 hour from gaining about 2 sec per hour. Time will tell. BTW, not that I did it, (echhhhhh!!!!) but what would happen if I move the other lever?

[Linder]

If my calculations are correct, moving the other lever should adjust the ratio of China to Taiwan reps in current production.

[Usil]

The other lever is directly connected to your bank account. It is a deduction lever.

Usil

Edited August 24, 2006 by Usil

[crystalcranium]

5 hours now since adjustment...+- 0 sec. Thanks!!!

[Rolexman]

http://www.rwg.cc/members/index.php?showto...p;hl=regulating

[Pugwash]

BTW, not that I did it, (echhhhhh!!!!) but what would happen if I move the other lever?

It makes the baby jesus cry.

When I moved the lever, it sent the watch into an unreliable frenzy. It sometimes stopped, ran ±20m a day, and was basically useless as a timepiece unless you set it several times a day.

After that, it had an enjoyable trip to Canada whereby it was fettled by Master The Zigmeister.

I'd run accuracy tests for you, but it's packed up ready to go back to Canada with a new dial ...

[Pugwash]

For the archives, here's a diagram:

[Usil]

Perfect. Another picture for my reference files.

Usil

[hyster]

Thats a great diagram Mr Pugwash, Ideal for the hard of thinking like me!