grand action problem

[David Ilvedson]

Scott,

I'm sure you have turned down your drop screws?

David I.



----- Original message ---------------------------------------->
From: Scott Helms <tuner@helmsmusic.net>
To: <pianotech@ptg.org>
Received: Wed, 15 Dec 2004 12:28:11 -0500 (EST)
Subject: grand action problem

>Hello -

>I am regulating a 1984 6'9" Schimmel grand. It has a Renner action, and
>the letoff buttons are the wooden dowel type which screw directly into the
>underside of the hammer rail. My problem is that I can't get letoff close
>enough to the string. The closest I can get it is about 7 mm, and that's
>if the dowel is screwed all the way up against the bottom of the hammer
>rail. I've checked and double-checked all of my string height
>measurements, and it just won't work. I've only regulated about 10 or 15
>actions, so I'm still learning, but the only way I can see to get the
>buttons up higher would be to shim the entire hammer rail so it sits
>higher than the action brackets would indicate it should. There's plenty
>of room under the pinblock to take it as high as I need to, but I'm not
>sure that this is the proper fix for the problem. I'm afraid a change in
>hammer flange height might create checking problems or other regulation
>issues. I probably would only need to raise the rail a few millimeters to
>get the letoff I need, but why would this piano have come out of the
>factory with such a huge geometry problem? Am I missing something? Is this
>one of those "action spread problems" that I've heard about in Technical
>Institute classes?
>-- 
>Scott A. Helms, RPT
>Helms Music Enterprises
>(269) 381-4521
>www.helmsmusic.net


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