Jim Is your bench flat, both front to back and side to side? Do you clamp down your action? Are you sure the back checks are hitting the hammers square on? Just a few questions that might give the answer Willem (Wim) Blees, RPT Piano Tuner/Technician Mililani, Oahu, HI 808-349-2943 Author of: The Business of Piano Tuning available from Potter Press www.pianotuning.com -----Original Message----- From: jim ialeggio <jimialeggio at gmail.com> To: pianotech at ptg.org Sent: Wed, Jul 29, 2009 3:56 am Subject: [pianotech] regulating backchecks? My Dear Action Nerds, As I work to refine my grand regulation skills and procedures, I've run into a catch 22 regarding grand backcheck regulation which has me scratching my head. Here's the problem: In order to accurately regulate the backcheck, you need to be able produce the full dip that will occur when the action is bedded in the action cavity. However, in order to actually adjust the backcheck, especially if the adjustment is an angle adjustment? the action needs to be pulled from its bedded condition so yo can get at the backchecks to do the adjustment. Now, as the action is no longer bedded, you have? thus lost ability to reproduce the bedded dip and full excusion of the key/backcheck, and you no longer know what adjustment you need to make. Similarly, I can regulate a very nice consistent backcheck line on the bench, with bedding approximately reproduced, but not quite...then the action goes into the piano and bingo I wasted my time. What am I missing here? Jim I -- grandpianosolutions.com (under construction) Shirley, MA ?(978) 425-9026 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090729/679eab11/attachment.htm>
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