[pianotech] SSM evaluation

PAULREVENKOJONES at aol.com PAULREVENKOJONES at aol.com
Tue May 26 19:00:34 MDT 2009


Gene:
 
The problem as I have run into is that the bridge top is not level along  
its length, and the calculations of net bearing from a zero on the speaking  
length (or the back scale length) don't account for the possible errors from 
a  varying bridge top. Without taking both as components from a zeroed 
point,  how can you tell where you actually have bearing or not? Yes, the net is 
 important, but the components are too. And using the level to establish 
the  consistency (or most often huge lack of consistency) in the bridge top  
is useful information. Is most of the bearing in the backscale? Or the  
front? Or the lack of it? How does one tell with a single  measurement zeroed 
from the speaking length? 
 
Paul 
 
 
In a message dated 5/26/2009 7:45:42 P.M. Central Daylight Time,  
nelsong at intune88.com writes:

 

 


Gene:
 
I understand, and the method I am suggesting which uses the bridge top  as 
a zero point allows for the measurement of both components which are then  
netted. Do you zero on the speaking length? 
 
Paul
 
Yes. I have never been able to consistently zero on the bridge, measure  
both angles, add them and come up with the same total number as when I zero  
on speaking length and measure the tail to get a total. They should be the  
same??
Gene



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