[pianotech] An alternative to cutting the balance rail punching; was best way to change touch on Yamaha grand

[erwinspiano at aol.com]

Be careful now David, some Fledgling Chinese piano make might ask you to come work in China. Hey it happened to one of my pupils.

  Dale






-----Original Message-----
From: David Love <davidlovepianos at comcast.net>
To: pianotech at ptg.org
Sent: Thu, Feb 11, 2010 7:45 am
Subject: Re: [pianotech] An alternative to cutting the balance rail punching; was best way to change touch on Yamaha grand




 
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.
> 
 

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