I was thinking about this procedure and it occurred to me that you could simply rout out a shallow "u" shape right in front of the balance rail hole on the bottom of the key. In my case I use very thin balance rail punchings (those red hitch pin punchings because I don't like to have to deal with balance rail punching compression and the thinner red punching is less prone to compression) so cutting those runs the risk of the key rocking onto the supporting card punching underneath. Seems like routing out a small channel in front of the balance rail hole (you could even do it with a rounded file) would accomplish the same thing since the idea is simply to avoid key contact with the punching as the key rotates forward. For that matter, doing that in manufacturing would somewhat obviate the need for the balance rail bearing. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Al Guecia/AlliedPianoCraft Sent: Thursday, February 11, 2010 6:07 AM To: pianotech at ptg.org Subject: Re: [pianotech] Al in N.C.--Question on procedure was- Best way to change touch in Yamaha grand Julia, yes the key is upside down with the back-check in front of you and the covered key away from you. I square up the front of the key and I cut down toward the front of the key. If that's not clear, let me know and I will cut one and take a photo. I don't know how to add a drawing. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100211/f279e99f/attachment.htm>
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