Fri, 27 Nov 2009 13:40:42 EST PAULREVENKOJONES at aol.com Paul, I thought it was necessary to clarify this. I have run into too many experienced technicians who apparently do not realize that this hammer "jump" that we induce during regulation is not something that is expected to happen during the normal functioning of the piano and say things like "the function of the repetition spring is to bring the hammer up from check" and the like. I have actually heard that said by a veteran technician during a chapter meeting - who was very surprised to hear me contradict him. He figured it out, eventually... So I like to clarify that point whenever I see a potential for ambiguity - especially when inexperienced technicians are present... Israel Stein > ------------------------------------------------------------------------ > That is an appropriate clarification of what I said. The general > "technician touch" regulation is of course not the pianists' touch. I > assumed we were talking about regulation, not pianism. > > Paul > > In a message dated 11/27/2009 9:36:36 A.M. Central Standard Time, > custos3 at comcast.net writes: > > Date: > Thu, 26 Nov 2009 21:47:41 EST PAULREVENKOJONES at aol.com wrote: > >> >> >> The other so far unaddressed result is that the hammer on a >> medium or hard blow into check, then released, will rise to the >> position of the _drop_ dimension from the string being raised by >> the "properly" sprung rep lever which is regulated to the drop >> dimension. Obviously all sorts of the things can go wrong with >> such close tolerances--spring regulation, check regulation, etc. > Well, Paul, not exactly. It would be more accurate to say that > "the hammer on a medium or hard blow into check, then released, > WHILE THE KEY IS STILL HELD DOWN will rise to the position of the > _drop_ dimension from the string being raised by the "properly" > sprung rep lever which is regulated to the drop dimension." If you > just release the key, the hammer will simply return to rest > position. Of course, what you describe is not something that is > normally done by piano players (at least not deliberately - I > suppose it could happen inadvertently) but only in the course of > regulation by technicians... > > Israel Stein > > > ------------------------------------------------------------------------ > > Subject: > Re: [pianotech] agraffe prep redux > From: > PAULREVENKOJONES at aol.com > Date: > Fri, 27 Nov 2009 13:43:53 EST > To: > pianotech at ptg.org > > To: > pianotech at ptg.org > > > David: > > We do the same thing to them that we do to all agraffes: remove them > and shape the contact surface as well as clean and polish the entire > agraffe. They are as easily removable as normal agraffes. > > > In a message dated 11/27/2009 10:37:14 A.M. Central Standard Time, > davidlovepianos at comcast.net writes: > > So what do you all do to prep those half agraffes that are found > on the underside of the strut on Knabes and other similar pianos. > Or have you know of a supplier that can replace them? > > > > David Love > > www.davidlovepianos.com > > > > ------------------------------------------------------------------------ > > _______________________________________________ > pianotech mailing list > pianotech at ptg.org > http://ptg.org/mailman/listinfo/pianotech > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091127/f83729b7/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 67862 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091127/f83729b7/attachment-0002.jpeg> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 28334 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091127/f83729b7/attachment-0003.jpeg>
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