Bluthner action regulation/specs

[Stéphane Collin]

Hi Dave.

I would add to the nice doc Ric forwarded that, following Blüthner, the 
repetition spring should be regulated so drop is 3 mm under the strings, and 
the hammer should only check on a quite forte blow, and the jack should get 
back under the nose when the key is lifted half way up to it's rest 
position.
If setoff can not be achieved with the 9 mm dip, you should raise the hammer 
line by shimming the rest rail.  Indeed, the hammers should rest on the 
rail.
If you read german, I could send you the original regulating procedure.

Best regards.

Stéphane Collin.


----- Original Message ----- 
From: "Ric Brekne" <ricbrek at broadpark.no>
To: <pianotech at ptg.org>
Sent: Tuesday, August 22, 2006 6:12 PM
Subject: Bluthner action regulation/specs


> Hi Dave, and anyone else interested.  Please refer to the following 
> address for regulation / descriptions specs.
>
> http://www.pianostemmer.no/files/Bluthneraction.doc
>
> Cheers
> RicB
>
>