Key Friction

[Richard Brekne]

Actually... Terry turned me on to this idea... you do it the same way as 
you take balance weight... except the stack is off so there is nothing 
on the keys.  I like to put about 50 grams of weight on the back of the 
key and then just take up and downweight measurements.

Three points of interest that and they have a suprisingly larger affect 
then most of us take for granted me thinks....  Balance rail pin, front 
and back bushings.  I'm also starting to get in the habit of gluing a 
very thin strip of 0.3 mm thick paper on either side of the balance rail 
hole.  Makes for a little more precise fulcrum point. Seems to even out 
end ratio a bit... tho I havnt gotten around to really looking closly as 
to why.

Cheers
RicB

Barbara Richmond wrote:

> Ric,
>
> I haven't gotten that far in my studies.  How do you measure that?  
> I've just always adjusted keys the "old" way--by touch--how the key 
> slides down the balance pin and the fit of the bushings.
>
> Barbara Richmond
> (I wanna be a touchweight freak.)