I don't think I could have said it better myself. Chris Solliday ----- Original Message ----- From: <A440A at aol.com> To: <caut at ptg.org> Sent: Friday, June 15, 2007 10:38 PM Subject: Re: [CAUT] Steinway repetition center pin height > Greetings, > > I wrote: > >>I think he is referring to capsizing the action, where the hammer > > shank is so far below its rest position that the jack cannot return under > the > > knuckle. >> > > > RicB writes: > << I dont think I've ever run into this situation. And I > > am trying to picture how it could come about. Anyone care on expounding > > on this a bit more? << > > Yes, When the hammershank is too far above its rebound cushion, > (often miscalled the "rest cushion"), there exists the possiblitity that under > fast repetition, the hammer will rebound all the way down to the cushion while > the jack is escaped. In this event, the key cannot return high enough to allow > the jack to reset and the note will not play until the key has been struck > several times and the balancier lifts the jack aaaallllll the way back up so that > the key can reset. The basic problem is that the knuckle can be so low in > the coincidental arcs formed by the hammershank and whippen, (as measured at the > knuckle/ repetition interface), that jack can't get underneath it from this > low a position. > If there is a tremendous spring strength, this effect can be minimized, > but then you have a very definite resistance to escapement, ruining the > sensitivity of pianissimo playing. > Hope this helps, > > > Ed Foote RPT<BR><BR><BR>**************************************<BR> See what's > free at http://www.aol.com.</HTML> > >
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