Miyota 8200 - It's Hacking, Jim, but not as we know it
I was fiddling around with my Citizen Blue Eagle (pic on Watcharama http://www.watcharama.com/ct005.htm if you want to see something like it, but mine has blue dial with irregular arabics) and noticed that, although it doesn't hack in the normal sense, if you turn the hands backwards when setting the time, the seconds hand stops, and stays stopped until tension is released. I'm not sure if this is a design feature or a design accident or a production flaw, but it does allow the time to be set with some accuracy.
The movement is a bog standard Miyota 8200, generally advertised as manual winding but non-hacking. Does anyone know if all 8200 movements do this, and if so whether doing it is likely to wreck the movement?
Kam
Interesting that "proper" hacking may be more disr
The way most hack levers work is by applying slight braking pressure to the side of the balance wheel. This force is in the relm of mirco-newtons, it doesn't take much to stop the balance. You're not going to disrupt with a standard hack lever
[There is al least one movement I know of that applies a brake to the third wheel to stop the motion.]
The stalling of the movement through cannon pinon is more likely to wear out the cannon pinon faster. However, I don't think anyone is going to "hack" their watch enough to actully see the increase.
And,
"(On standard watches --- God only knows how things are arranged on nonstandard ones.)"
all movements have some form of friction clutch to isolate the hands from and setting mechanism during setting.