Hello Kevin, This is a great area for study, yes? Do you agree that the rep lever is not involved in lifting the knuckle/ hammer after the drop screw contacts the rep lever? Dan on 9/9/01 10:32 PM, Kevin E. Ramsey at ramsey@extremezone.com wrote: >SNIP "What happens if the rep lever contacts the drop > screw too soon? Then the jack continues to lift the knuckle further up all > by its self, resulting in a draggy feeling at the end of the key stroke." > > ----- Original Message ----- > From: "thepianoarts" <thepianoarts@home.com> > To: <pianotech@ptg.org> > Sent: Saturday, September 08, 2001 9:36 PM > Subject: Shigeru Kawai regulation > > >> >> The technicians in the Dallas/ Ft.Worth Texas part of the world were >> treated to a technical this past week, on the refinments of the Shigeru >> Kawai, their preimer piano line. The technician who follows a particular >> instrument through the facory, also goes to the new owners home to service >> it. I guess that is a one time deal, since all the techs are coming from >> Japan. Very impressive. Any other manufactures doing that? I love it when >> someone raises the bar. >> >> There are a couple of regulation differences that are interesting. >> #1-Drop is set slightly early, and #2- jack height to rep lever height is >> set so that there is no winking. The distance (jack height to rep lever >> top) is subtle, so as not to cause a hammer line wave. >> I beleive the reasoning for the earlier than usual drop, is that there >> is a smoother feel if drop and let-off are spaced slightly. >> Also, I beleive their thinking is, an earlier drop allows a safety > net >> which insures a positive 'scrape' or contact by the jack, which would be >> reduced if the drop timing is later that the let-off timing. In other >> words, let the jack do it's job of lifting the hammer. Keep the spring >> loaded rep lever out of the picture. >> >> Dan >> >> >
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