regulation problems in Aeolian era M and H 50"

[David Ilvedson]

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I think the jack stop rail interferring is the problem.   Good=
 thinking Keith.  The jack is lifting the hammer but the cycle is=
 stopping before the key bottoms out.   

David I.

----- Original message ---------------------------------------->
From: Keith McGavern <kam544@gbronline.com>
To: Pianotech <pianotech@ptg.org>
Received: Sun, 19 Dec 2004 17:25:33 -0600
Subject: Re: regulation problems in Aeolian era M and H 50"

At 9:55 AM -0500 12/19/04, Piannaman@aol.com wrote:
 There was a huge gap between the bottom of the key and the=
 punching when the key was depressed.  This led to hammers=
 blocking, bobbling, and a feel that could only be described as=
 spongy. 
Keith,


That's what's been causing me problems.  I've searched and=
 searched, and I can't figure it out.  I've decreased blow=
 distance, and there was not enough aftertouch and bobbling=
 hammers regardless of how I tried to regulate it.

I'll try to get back over there sometime early in the new year=
 and see what I can figure out.  Very frustrating piano.  

Thanks for the input.


You're welcome, Dave.


I would like to add that when you go back out, to concentrate on=
 finding out what's creating the interference on just one of the=
 notes, dissect it, so to speak.


Another thing that comes to mind: If this huge gap space exists=
 on all 88 notes, then you have theoretically eliminated the=
 damper system from being the culprit. If


I envision the possibility of a jack stop rail device being set=
 too close to the jack levers, and therefore the jack levers are=
 blocking up against this rail, preventing the completion of=
 normal key travel.


Whatever is causing the problem ought to be very obvious, but=
 only after you discover it.


Keith
-- 

Keith McGavern
Registered Piano Technician
Oklahoma Chapter 731
Piano Technicians Guild
USA


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