Keyframe Bedding

[A440A at aol.com]

Dale  writes:

<<  I like to set the keybed/keyframe contact with keys off & action 
screwed to frame (as per Yamaha) so I can really understand the unloaded strength of 
the keyframe I am working with. >>

Greetings, 
   I think I get better results when I bed the keyframe alone, then set the 
action on it and shim any feet that are not on the cleats. This precludes any 
internal flex, and I believe,  can make the action bedding less climate 
sensitive, ie, if there is a gap between the action and its footing, screwing them 
together creates a stress between the wood and the metal, in effect, a spring.  
The metal is not going to fatigue so the wood will constantly work with 
changes in humidity.   
    I have done it this way many times (going on 25 years of watching lots of 
my rebuilds), and I see stable results at the school between seasons .  It is 
more labor intensive, but, I have found that long term returns make it a good 
investment. 
Regards,  



Ed Foote RPT 
http://www.uk-piano.org/edfoote/index.html
www.uk-piano.org/edfoote/well_tempered_piano.html
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