Sort of like this, the recess can be even shallower (sorry you need to be in html to view this). David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Skolnik Sent: Thursday, February 11, 2010 6:56 AM To: pianotech at ptg.org Subject: Re: [pianotech] An alternative to cutting the balance rail punching; was best way to change touch on Yamaha grand David - I'm not seeing how you could accomplish this without weakening the wood in front of the balance hole. David Skolnik Hastings on Hudson, NY At 09:27 AM 2/11/2010, you wrote: >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/fd10967a/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 4836 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100211/fd10967a/attachment.png>
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