I'm happy to have run into the problem so it could be shared (I guess???). Thanks to all for the assistance in clarifying my thinking about this. I plan to have a closer examination of the hammer flange pinning at the beginning of April and will repin to more conventional friction levels if I find them too low. I'll examine other convergence line issues at that time (as has been suggested), take more specific measurements and I'll report my findings after that. Should an adjustment of the leverage become necessary I have some thoughts about how to accomplish that in a non invasive and easily reversible way. That would be to use the cut punching approach or insert a small piece of veneer but at the front side of the balance rail pin thus increasing the key ratio. I'm trying to figure out the easiest way to do that without having to reset the key level and I have a couple of ideas depending on exactly what I find underneath the keys. Since the BW is currently set quite low a modest change to the leverage might very will push it back up to a medium weight. That combined with some added friction will push the DW up a bit but hopefully not so much as to be objectionable. It will certainly test the theory that it's not the actual weight that is the problem but the lack of a sense of control and contact through the keystroke that is causing some compensatory technical action that is being interpreted as a weight issue. The change in AR using this method will be easy to reverse if it proves ineffective at solving the problem. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Steven Hopp Sent: Wednesday, March 17, 2010 5:14 PM To: pianotech at ptg.org Subject: Re: [pianotech] Action inertia FW versus SW Wow! What a discussion. I count myself privileged to peer awestruck into this area of expertise. Many Thanks. Steven Hopp Midland, TX. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100317/c6cd6620/attachment.htm>
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