Hi all just put a new torsion spring on a Koma but I have noticed that when the pendulum is going clockwise the fork vibrates but it is very smooth going anti-clockwise, anyone have any suggestions as to why. Thanks Dell
I'll throw out a few ideas. -There is some small vertical and horizontal movement in the pin/fork contact point each beat, so check for a notch in the fork or pin on the side making contact during clockwise rotation. -Verify that torsion spring clamps are square to the spring and positioned square in the hanger and pendulum. -Proper clearance between pin and fork 1-2thousandths.
Will check again tomorrow but I could not see any problems and used a feeler gauge to check gap in fork 3 thousands. Dell
Sometimes, this happens when the clock is slightly out of beat and the fork is a bit low on the suspension spring.Also check that the pin on the anchor is vertical and not tilted toward the back plate.
