This is a multipart message in MIME format ---------------------- multipart/alternative attachment I often pull the action out slightly to get a better view of the= hammer/string for let-off, especially in the bass. I don't see= any huge problem in regulation in the piano as long as I'm not= doing it 8 hours a day..;-] One of the perks of the= independent tech...variety! David Ilvedson Original message From: jason kanter To: Pianotech Received: Tue, 1 Feb 2005 10:00:22 -0800 Subject: Let-off in piano Just reading David Nereson's post about the old Bl=FCthner he takes= care of. He comments: "Can't regulate let-off in the piano -- no= way to get at the regulating screws." Which brings up an important point for me. How DO you regulate= hammer height and letoff in the grand piano? The method I= learned is: Pull the action, measure string height at the= extremes of each section using a string height gauge and a= busines card; put the action on a nice, firm, flat surface (I= know that this is the place where errors creep in, if the keybed= and the work surface are not both quite flat); use a contraption= to simulate string height; and regulate hammer height, letoff,= checking, drop, etc outside the piano. In some situations I have had to do an on-site regulation where= there is no good, flat surface for the action, so I've tried to= do it in the piano. I can't see how you can do a good job with= it. Feeding a hammer blow gauge through the dampers, turning it= 90 degrees and pulling it gently up to contact the undersurface= of the string, and holding it there while trying to get an= eyeball on the hammer surface from the front of the piano and= using the other hand to regulate the capstan ... difficult= enough to do samples but what a challenge to do them all that= way. Very hard to get a good line of sight over the hammer= flange under the pinblock. So I have resorted to approximating,= measuring only a few, pulling the action into my lap and= eyeballing the tweeners. I *know* the results are not as good as= what I could do on a good bench. Same issue for letoff, and same for backcheck. No doubt you more= experienced folks have developed fast, efficient, easy ways to= do this. Please enlighten. Does Bill Spurlock's description sound like what any of you do?= "hunching over the stretcher, peering past the dampers and= through the strings to judge let-off distance, then looking= under the pinblock to place the tool on the adjusting screw,= then leaning forward again to watch as you make the adjustment.= All the while you must "squeeze" the key gradually to slow= hammer movement enough that you can accurately see the let-off= point." | | | | | | | | | | | | | | | | | | | | | | | |= | | | | | | | | Jason Kanter . piano tuning regulation repair jkanter@rollingball.com .. cell 425 830 1561 serving the eastside and the san juans ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/27/52/53/8b/attachment.htm ---------------------- multipart/alternative attachment--
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