Here is a Self-Winding clock that raises some questions:
1. It appears that the friction clutch on the minute hand is too stiff and the synchronizaton coil is not strong enough to snap the minute hand back to 60. I can weaken the clutch action by loosening the minute hand retaining nut but this doesn't seem right. Is there some other adjustment here?
2. Running the synchronizing coil run on a higher voltage (4-5V) improves things. Is this proper?
3. When the synchronizing coil energizes and attracts its arm, how close to the coil heads should the arm get?
4. Picture 2 shows the minute hand reset arm, with a small hook pointing straight up. What's this for?
5. Picture 3 shows two fixed posts on the front of the front plate, below the seconds arbor. The larger one has a cross-drilled hole, as if something is missing here. What are these posts for?
6. Picture 4 shows what looks like an adjusting screw (but isn't) retaining the reset armature on its shaft. Is this just an ad-lib part?
Thanks,
Dave
1. It appears that the friction clutch on the minute hand is too stiff and the synchronizaton coil is not strong enough to snap the minute hand back to 60. I can weaken the clutch action by loosening the minute hand retaining nut but this doesn't seem right. Is there some other adjustment here?
2. Running the synchronizing coil run on a higher voltage (4-5V) improves things. Is this proper?
3. When the synchronizing coil energizes and attracts its arm, how close to the coil heads should the arm get?
4. Picture 2 shows the minute hand reset arm, with a small hook pointing straight up. What's this for?
5. Picture 3 shows two fixed posts on the front of the front plate, below the seconds arbor. The larger one has a cross-drilled hole, as if something is missing here. What are these posts for?
6. Picture 4 shows what looks like an adjusting screw (but isn't) retaining the reset armature on its shaft. Is this just an ad-lib part?
Thanks,
Dave



