Heavy action

[David M. Porritt]

I was talking about 40 - 44 grams downweight.  

dave

*********** REPLY SEPARATOR  ***********

On 9/30/2002 at 9:40 AM Newton Hunt wrote:

>> Does anyone think I'd get into inertia 
>> problems adding this amount of lead?  
>
>Yes.
>
>I had a similar problem with an SF.  I wish I had had the
opportunity 
>to go back and analyze that action for I think the capstans are
>mis-located and maybe the knuckles are in the wrong place.
>
>>From where it is now you will need to do a full Stanwood analysis
to
>determine exactly where the problem is and then you will know
exactly
>how to fix it.  Without the numbers there is no way to know what to
>change and by how much. 
>
>> I can add 1 - 2 weights to each key 
>> and bring it down to 44 at A0, 42 at C4
>
>Are you referring to balance weight or down weight?
>
>> There is a point of diminishing returns on some actions where you
can >
>reduce downweight by adding leads but the additional inertia makes
it >
>feel to the player as though it is as heavy as it was before.  Does
>> anyone think I'd get into inertia problems adding this amount of
lead?  
>There certainly is and David has provided a ceiling guide for key
front
>weights.  
>
>This is exactly the kind of problem David's system is designed to
solve. 
>
>		Newton
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives


_____________________________
David M. Porritt
dporritt@mail.smu.edu
Meadows School of the Arts
Southern Methodist University
Dallas, TX 75275
_____________________________