<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> Hi all I have to admit this still seems a bit strange. Not that I doubt anyone mind you... but one thing nearly all replies have alluded to is a situation where the shank is resting on the cushion.... and at the same time resulting in a condition where the jack can not get under the knuckle if it was not already under there to begin with. This speaks to me of two problems. First... the jack is supposed to be under the knuckle well before the the shank even gets close to the rest position after play.  If it doesnt.. then either the rep lever spring is too weak, or the center may be to tight.. or the jack is regulated too far out... similar things. The rep lever is supposed to lift the hammer via the knuckle up to a position where the jack can slip under as soon as (nearly immediatly after) the key is released.  Second... if resting on the cushion to begin with... then either the rep lever spring is to weak (again)... or the whippen is simply regulated too low. A low whippen wouldnt cause this problem... quite the opposite really... it would solve it by introducing an artificial sort of lost motion. All this said... I've run into actions where something like this seems to happen to individual keys.  Not to the point of action failure.. but to the point where getting a stable hammer (rest) line is virtually impossible.  I've always solved the problem with friction control measures... replacing worn parts... and securing a good enough regulation with appropriate spring strength. If the cushion height forces the hammer to rest too high... this should basically just result in an uncomfortably shallow dip.  If its too low... a dip which would be too deep.... yes ?  no ?  Id like to hear from Bob Hohf on this one... seems like his action heights article perspective would be valuable here. Cheers RicB <blockquote> <blockquote> Ric writes: I have not thought of this has being related to relative positions of the balancier and hammershank centers tho. And I am still a bit foggy on how these can contribute to this condition. </blockquote> </blockquote> <blockquote>    hmm,  I may have stepped on a semantics snake, here. I didn't mean to say that the relative positions of these two *contribute* to the problem, but rather,  illustrate the condition, ie, when the Knuckle is so low that the action cannot reset.  One major cause, I believe, is that in the capsized state, the hammershank is resting on the cushion so its weight isn't helping the key return. this leaves only the spring to overcome the FW and return the key to its at rest position, which it is not designed to do.   </blockquote> <blockquote> <blockquote>On the surface of it... it would seem that as long as you regulate with in reasonable correspondence to specs... all should work reasonably well. </blockquote> </blockquote> <blockquote>I  agree, however, the normal in a Steinway is that the specs are all over the place, (generally owing to excessively high or low  plate height).  This is why the brand allows the creative regulator to excell.  These actions respond to regulating according to principles rather that pre-set figures.  I have increased the height of the rest cushions to overcome the capsizing problem. It is not only much easier than raising the cleats, it doens't upset the hammerflange pin to string relationship, (though there is often much to be improved in this regard if the pinblock is not too thick.) Regards, </blockquote> <blockquote>Over recent years, Steinway has begun to increase their allowable  keydip to accomodate longer knuckle geometry, but that is another discussion.  </blockquote> </body> </html>