Keep on filing...(picture attached)

[Porritt, David]

Ric:

 

You need to read more carefully.  Dean said " If you increase the
resistance of the pinning, you must also increase the spring tension to
overcome this resistance for a given hammer lift."  Of course the spring
tension doesn't get increased until you increase it.  The point is you
can increase the tension helping to return the key and hammer without
making a jumpy hammer.

 

dp

 

David M. Porritt

dporritt at smu.edu

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
Behalf Of Richard Brekne
Sent: Friday, June 22, 2007 10:29 AM
To: pianotech at ptg.org
Subject: Keep on filing...(picture attached)

 

Oh come on Dean... for criminees sakes... spring tension isnt increased 

until you actually increase it. Nobody said anything in previous posts 

about maintaining <<a given hammer lift>>.  But since you first mention 

it... have you ever actually tried seeing what happens to hammer lift 

for a say.... 5 gram change in rep pinning resistance ?  I havent.. and 

cant really say I know what the result would be.  But I would imagine 

(as in guess at) that you probably would not see all that much a change.


Another little tidbit to check out tho... good fun.

 

Cheers

RicB

 

 

    Ric wrote: After all.. the spring tension is not actually increased.


 

    Seems to me it is. If you increase the resistance of the pinning,

    you must

    also increase the spring tension to overcome this resistance for a
given

    hammer lift.

 

    Dean

 

    Dean May             cell 812.239.3359

 

    PianoRebuilders.com   812.235.5272

 

    Terre Haute IN  47802

 

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