Note that as the watch runs down, it may speed up or slow down a little bit, although I suspect Rolexes are pretty good this way. If you want to leave it out of the winder, do it for several short periods (e.g. overnight), not one long period.Hi Gaijin,
Thanks for the detailed reply above - definitely find it useful and thinking how I can place my watch so can get average of 0 gain a week (thinking 2 - 3 days out of the winder per week. just need to space it around the power reserve).
For the vast majority of movements, numbers around 270 degrees indicate a movement in perfect health. Much less than 240 indicates the lubrication is starting to lose its effectiveness, and much more than 300 suggests an incorrect (too strong) mainspring.A few things I want to understand more:
1.Beat Amplitude - you mentioned this measures the swing of the movement and is a sign of wear/tear/friction - can you let me know what is the range of 'good' 'concerning' and 'bad' etc.
It is the angle through which the balance wheel turns while it is actively being propelled by the pallet fork and escape wheel. If you think of the balance wheel as a swing with a child on it, and you are the parent are pushing the swing to keep it going, the lift angle is the angle of swing during which you're pushing.2. You mention the measurements were at a lift angle of 52 degs. - what is a lift angle?
Yes. The machine that does this is called a timing machine. One puts the watch in the sensor, tells the machine the beat rate (e.g. 28800 bph for your watch) and lift angle, and the machine does the rest. It's all done via a sensitive microphone that listens to the movement and analyzes the sounds that it makes.3. (not related to my watch) Are all the measurements above applicable to any mechanical watch? So in theory if I could put a non-rolex mechanical in the machine I should get some interesting comparative measurements?
EDIT: PS. I'm a beginning amateur watchmaker, and also being an electronics hobbyist, am in the process of building my own timing machine.