Lift angle of Caliber 80111

hi,

I just received a timegrapher and I am looking to test out my vintage inge.

Would anyone happen to know the correct lift angle of the Caliber 80111?

thanks,
Mike

anyone know where I can find this out?

I checked Dr Ranfft's website and it's not listed there.

I can tell you that Cal 80111 has a frequency of 28,800 vibrations per hour. If your timographer can tell you the amplitude, there might be a way of calculating the lift angle.

Alternatively, with your watch on the machine, start with lift angle of 80 deg. And see what result you get for frequency. Using trial and error, when you get a result of 4Hz, or 28,800vph, you might be able to get it this way.

Why not search the web with the term "how to find lift angle of a watch" I found many results, but forum rules prevent me from posting the links.

Good luck.

Thanks Mark. I should have mentioned, I already looked at a few sites that list a bunch of movements and didn't see it listed there, the other method I saw to calculate it required opening up the movement and taking a video of the pallet fork which is beyond my level of comfort or expertise...

I'll give your method of using the frequency a try.

Thanks a lot for the help.

Hmm, the beat rate is auto detected, so if I change the lift angle setting the beat rate remains the same at 28800.

My timegrapher does tell me amplitude, is there some calculation that I can do to get the angle? The input I need to provide is the lift angle, so the output amplitude is based off of that value. If I am doing a calculation based off of the reported amplitude, that does assume that my watches amplitude is correct though right?

fyi I'm using the timegrapher 1000, my version is the acetimer one...

thanks again,
Mike

I just remembered the inge has a crystal caseback. :-)

Perhaps I can explore the video option.

So, reading through those instructions in detail, I still need to open up the caseback and put a mark on the balance wheel before I can validate this. So that is not an option...

The amplitude is variable so there is no way to calculate lift angle from it.
The Lift Angle (constant)is required for the machine to calculate the amplitude.
Perhaps you could call a boutique that has a watchmaker on hand and ask him.
Sadly I was attending the watchmaking class in New York this weekend, but a constant supply of champagne and holding little wheels took all my attention and I forgot to ask…………

From what I've read Amplitude should be 270 to 315 deg. According to another source 290 to 320 deg.
And Cal 8541 lift angle is 48 deg. Hope this helps, but I don't think it does.

Either way, your machine will give your daily rate error, and that's all you really need.