[pianotech] Blocking Problem

[tnrwim at aol.com]

Floyd

As Joe mentioned, it sounds like there is too much key dip. 

Wim





-----Original Message-----
From: Floyd Gadd <fg at floydgadd.com>
To: pianotech <pianotech at ptg.org>
Sent: Sun, Sep 19, 2010 1:03 pm
Subject: [pianotech] Blocking Problem


List,
 
I was adjusting the let-off in the bass of a vertical piano on Friday.  With a slow depression of the key, let-off could be measured at 1/8".  With a firm blow, the hammer blocked solidly against the string, with no interference from the backcheck.  I have only two guesses as to why.  One is that the existing depression on the regulating button is leading to inconsistent interaction with the toe of the jack.  The other is that the profile of the hammer butt buckskin has been compromised by wear, leading to this issue.  
 
What other possibilities am I missing?
 
Floyd Gadd
Manitoba Chapter


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