jack hitting h.flange

[Fred Sturm]

Can't answer your specific question, but I've certainly noticed the
problem - also on a D. First time it was a very problematic knock/click
to find. The solution is to reduce aftertouch, and have firm front rail
felts. Why are they not consistent, note to note? I guess it's a matter
of tiny inconsistencies in things like tilt of flanges on the rail,
small twists of wood grain, and the like.
Regards,
Fred Sturm
University of New Mexico

Wimblees@aol.com wrote:
> 
> I regulated a B Friday, and now there are about 3 or 4 notes in the
> octave just above the break where the jack is hitting the hammer
> flange on a hard blow.  Upon close inspection, when I bring the wippen
> up, I can make the top of the jack touch the bottom of the hammer
> flange on some of the notes, but not on others. I can't seem to figure
> out why it is doing it. What makes the jack stop it's upward motion
> when the wippen is pushed up?
> 
> Wim