Greatoldone

Beginner's luck, AKA Jason's first attempt at regulating...

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My Autavia 11630 has been losing quite a bit of time recently. So I decided to have a go at regulating it myself. I've bought a Timegrapher to make things more easy (the iOS app I've got on my iPad is ok, but you've got to get the mic on the headphones in just the right spot and keep it there for it to be effective).

Anyway, it probably wasn't the smartest thing to do, starting on something as complex as the Cal 12... especially when you take the back off and the regulation isn't as per Marks excellent instructional videos and articals. It's done via two screws on the balance bridge, the one nearer the jewel affecting the rate, and the one furthest away the beat. Both screws are excentric and shift the the hairspring appropriately.

That said, after 15 mins of working out how it all relates to one another, and seeing what it was doing - this is what I've managed to achieve. Pretty chuffed. :woohoo-jumping-smiley-emoticon:

 

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So it shouldn't have been loosing time if it had been or if it had they didn't do a very good service it should have been checked and regulated and be good for a few years not a couple of months.

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    • Thanks, Jonathan! I always appreciate a good DIY project, and yours was a very clever one that was just what I needed at the time! Kevin
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    • The watch should run roughly to time without any oil. 40 minutes slow per day is a serious error, and assuming the balance is swinging with reasonable amplitude, I'd expect it to most likely be an issue with the resonance of the balance (hairspring, indexing, balance weight) or slipping in the motion works (cannon pinion). If you are sure that the timegrapher is set to the correct beat rate, then it would seem to point at the balance.
    • Did you try what I suggested by inspecting the pallet fork shake while the balance is held 90 degrees away from rest? I casn explain in more detail if required. I'd also check the basic things like the the impulse jewel (is it loose, broken?) and generally check the safety dart on the pallets doesn't look bent.