400 day clock

[0132joshua]

Hi, re start stop torsion clock. Can run for a day or 15 mins. All pivots are good, no oval holes, train runs nice when escapement removed, Pin pallet, which works nice when manually operated. I wonder if the fork is situated to high, would this cause aformentioned. If so, what night would be ideal, many thanks.

 

[KurtinSA]

Hopefully a moderator can move this to the 400-day forum for better visibility.

A fork that is high takes more power to run. Are you familiar with over swing? A clock must have over swing in order to have a good chance of running. I would lower the fork and see what happens. The rule of thumb is to lower the fork by increments until you find a point where the movement flutters. Then raise the fork by 1 or 2mm.

Do you have pictures of the front as well as the back plate? The 400-Day repair guide gives guidance on initial placement of the fork.

Kurt

 

[0132joshua]

Hopefully a moderator can move this to the 400-day forum for better visibility.

A fork that is high takes more power to run. Are you familiar with over swing? A clock must have over swing in order to have a good chance of running. I would lower the fork and see what happens. The rule of thumb is to lower the fork by increments until you find a point where the movement flutters. Then raise the fork by 1 or 2mm.

Do you have pictures of the front as well as the back plate? The 400-Day repair guide gives guidance on initial placement of the fork.

Kurt

Hi, many thanks reply, not familiar with over swing, great info, will give it a go soon.

 

[KurtinSA]

As the pendulum swings back and forth, there will be two points, one each direction of rotation, where you will hear the faint sound of the pin falling off the pallet and hit the next pallet. This is the "tick" and "tock" of the movement. There needs to be sufficient power so that the pendulum continues movement past each of the tick and tock...probably on the order of 25 degrees of rotation. And this additional rotation past the tick and tock must be equal. If not, then the clock is not in beat. To put the clock in beat, you would need to rotate the saddle holding the top block...typically you would rotate the saddle in the direction of the side that has the shortest swing past the tick-tock.

Kurt

 

[Willie X]

What Kurt said, and you would not normally remove the post screw. The upper SS block is usually held by a small horizontal thumb screw.

The screw you removed is supposed to be snug, never tight. This is how the beat is adjusted, by carefully rotating that upper hanger post.

Willie X