[CAUT] tight balancier

[A440A at aol.com]

David writes: 
<< The ability of the hammers to be held in 
check is affected by:
<SINP>
jack position at rest - too far forward will leave jack too close to 
knuckle after let-off, either allowing descending knuckle to bound on 
jack top, or the back radius of the knuckle will rub or otherwise 
push jack out of the way, stealing energy from the descending hammer 
that might prevent it from overcoming rep spring.>>

I don't know that I understand this.  I believe that the jack position at 
rest, if moved farther under the knuckle, will simply cause the jack to begin 
moving earlier in the keystroke, (for a given let-off).  Once the jack is off the 
spoon, it doesn't matter where it started. 
    It is helpful to place the action in check, then adjust the capstan so 
that the jack is equidistant between the knuckle and the stop pad.  This is your 
optimum blow distance for that particular let-off and dip.  Changing the 
beginning jack position won't have any effect on this.  
Regards,



Ed Foote RPT 
http://www.uk-piano.org/edfoote/index.html
www.uk-piano.org/edfoote/well_tempered_piano.html