REPETITION

[Lance Lafargue]

Rog,
I was at Yamaha two weeks ago for the Little Red Schoolhouse and my first
thought was repetition spring tension (Jon, et al, have pointed out good
things to check first).  I don't know what is causing your problem, but one
of the things that I learned was that Yamaha sets their spring tension VERY
strong for fast repetition.  
Terry Nimi's analogy or explanation was that in Japan if a boss walks into
a room filled with employees they would stand up very quickly.  This
hurried rise is what the hammer should look like.  Keep in mind that the
Japanese are much more respectful and inclined to rise quickly to a
superior than an American working in McDonalds.
 If all else is correct, strong spring tension will not cause a problem. 
You should feel the bump of the hammer rising, but it should not be
uncomfortable.  
Did you check jack pinning? 
LANCE LAFARGUE, RPT
LAFARGUE PIANO SERVICES
New Orleans Chapter
Mandeville, LA.
lafargue@iamerica.net

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From: Rogerio Cunha <rogeriocunha@openlink.com.br>
To: Pianotech Mensagem <pianotech@ptg.org>
Subject: REPETITION
Date: Tuesday, December 01, 1998 3:53 PM

I am with a great problem with a YAMAHA  grand model G2 and I need help.
All the measures that I did on it I think that they are  very good : hammer
weight, letoff, drop off, the jacks are correctly under the knuckles, key
deep etc., etc. but the repetition is poor !
The friction is very good ( I used powder micro Teflon).The repetition
springs are good.
There are a problem : I haven't the Yamaha measurements and I used the
relation key deep-hammer travel 1:5.
What can I do in order to increase the repetition that is poor.
Rogerio Cunha - IC Member of the Guild.