Instructive Little Puzzler

[Gregor _]

what´s now with the solution of this puzzler: did I miss the correct answer?

Another typical solution (but without using glue): too less lost motion, 
i.e. the jack is too narrow to the butt. So it can´t travel back. Or the 
leather of the butt is too rough. Or the checker and the backchecker stick 
together.....

Gregor


>From: "Alan Barnard" <tune4u at earthlink.net>
>Reply-To: tune4u at earthlink.net, Pianotech List <pianotech at ptg.org>
>To: pianotech at ptg.org
>Subject: Instructive Little Puzzler
>Date: Sat, 25 Aug 2007 12:50:10 -0500
>
>Problem:  Acrosonic with a key that just occasionally sticks after a 
>hardish blow. And when it sticks, it really sticks.
>
>
>
>Diagnostics:  Keystick NOT sticking. NO foreign objects or parts 
>interference. Jack and jack spring working just swell, thank you. NOT a 
>pinning problem with any flange. Damper working correctly, spoon NOT 
>corroded and NOT digging into the felt. Hammer and butt in good condition 
>and traveling correctly. Lost motion, letoff, and aftertouch (on a spinet?) 
>nicely regulated, after some adjustments by yours truly.
>
>
>
>Hint: Had to remove the @*&#$% action and practically use my xray vision to 
>spot the problem. Actual fix took about 15 seconds and required a tiny drop 
>of PVC-E glue.
>
>
>
>Alan Barnard
>
>Salem, MO

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