[pianotech] Action inertia FW versus SW

[David Love]

If that were the case, wouldn't a small strip of action cloth to build up
the wippen cushion achieve the same goal without having to change the
knuckle?

 

David Love

www.davidlovepianos.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ed Foote
Sent: Wednesday, March 17, 2010 4:35 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Action inertia FW versus SW

 

 

Once the stroke is initiated the action accelerates with not enough control
and the pianist gets a feeling of being disconnected from the keys.  The
pianist feels that he loses control and a sense of weight through the
stroke.  Also, because this fly-away issue controlling pianissimo playing is
difficult and must be done with the utmost caution in arm weight (I can tell
this myself as a player).  

 

  I would take a close look at the "magic line", and see if perhaps the
capstan contact patch is moving through the line very early.  If so, you
have a decreasing action ration from almost the start.  A larger knuckle
will move the crossing point lower, possibly restoring a bit of control on
ppp.  
       If capstan placment on the new keys is too close to the balance rail,
there may also be a slowing down of the action due to FW getting the upper
hand with the leverage. 
Regards, 

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

  

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