Reducing weight was RE: older kawai whippen assist springs

[Paul Chick (Earthlink)]

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From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf
Of Alan Barnard
Sent: Tuesday, November 22, 2005 8:08 PM
To: deanmay@pianorebuilders.com, Pianotech
Subject: Reducing weight was RE: older kawai whippen assist springs

 

I have a customer with a Baldwin console who has MS and I really need to
lighten the action for her if possible. 

 

After minimizing friction, adjusting the dampers so they lift a little later
in the cycle, what else can make a difference?

 

Can you/should you shave and cove hammers like you can in a grand?

 

Weaken the return springs a little?

 

Add lead?

 

Any ideas on what's worth doing here?

 

Alan Barnard

Salem, Missouri

 

 Things we've tried with some success: weaken the damper springs by pushing
them toward the damper lever; add a little more dip to increase after touch
( you may need to balance this against a longer hammer blow distance); ease
keys at the balance pin hole; polish all key pins and lube with McLube;
change damper timing so the dampers lift when the hammer is 2/3's of the
hammer travel to the string.  On one action we lowered the sharps to 1mm
above the naturals when depressed.  Experiment with a few notes on each/all
of these to get the desired touch.

 

Paul C


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