Quoting RicB <ricb at pianostemmer.no>: > > This said... Skolnik covers a lot of good ground on this thread in a > > short space. Wims problem .... Wim, seems to me you have more or > less > eliminated the balancier centerpin tightness and the repetition > tension > from the field of potential sources of your problem. Strikes me as > time > to look for other sources. David listed up quite a few classics. > > Cheers > RicB Ric I have done just about eveything David mentioned to solve my "bobbling" problem. If you recall, I just found out about the balancier centerpin solution at the seminar a couple of weeks ago. So this is basically my "last resort". As I said, I got a bunch of balanciers up to 6 grams. Now I will go for more resistance, when I can find a couple of hours in the hall. Wim > > > 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 > Willem Blees, RPT Piano Tuner/Technician School of Music University of Alabama Tuscaloosa, AL USA
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