keyboard levelling

[Isaac Sadigursky]

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Greetings to everyone! Hope,the turkey tasted great!
Leveling leads on back checks can be problematic. On some older pianos there are clear marks from old-fashioned key leveling leads which had 2 sharp nails and were tapped with light hammer near the capstan,but,probably,it was too time consuming.I do have a sozen of those leads with nails and they work.
But about 20 years ago late Roger WEisensteiner introduced KImball factory method:about 15" machine bolt is filled through it's lenght with flat machine washers  1 1/2" outside dia 3/4" inside hole,about 100 of them fill     entire length of the bolt.Placed over an octave  this method enbles to do key leveling fast ,especially on verticals ,when the action is out.I had good experience doing it that way and have one of those units in the shop and one for the field work. {I'm sure my friend JOe Garrett can give a better description of that method,but I had shown it in my classes and a few local technicians copied that method.  Best Regards to you all. Isaac Sadigursky 


----- Original Message ----- 
From: David Love 
To: Pianotech
Sent: 11/25/04 9:19:23 PM 
Subject: RE: keyboard levelling 


I’ve never liked clipping leads to the back checks because they often influence the key height differently than the wippen/hammer assembly resting on the capstan.  The clip-on leads should really be designed to clip over the capstan rather than the back check.  You would get a more accurate reading that way.  What I have done is to take 12 clip on leads, set them on top of a heavy iron vice and flatten them slightly with a hammer so that they set more securely on top of the key near the capstan.  Then I level an octave at a time after presetting the guide notes with the stack on.    
 
David Love
davidlovepianos@comcast.net 
-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Quentin Codevelle
Sent: Thursday, November 25, 2004 1:15 PM
To: pianotech
Subject: keyboard levelling 
 
Hi David,
 
This is precisely the method that I use with my straight edge.
I level all the C's individually and then with the straight edge.
I think the split punching trick is good, but I only use for touch up.
If I have big levelling work, I unscrew the action and I lead the back checks.
 
Quentin
 
 
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