Sustain pedal lift ratio

[Erwinspiano at aol.com]

Hi Ron
  This makes a lot of sense .  Thanks for the  post



If the push rod is fitted with guide pins the angle of the push rod, with  
respect to the damper tray and damper lever, won't be of much consequence,  
since it will contribute very little friction. The damper lever under  the keybed 
is a different matter. I prefer to set this lever so that it is  horizontal at 
half damper lift. This arrangement will minimise friction  between the lever 
and the lyre push rod. For our own 225 piano, we  machine away the lower-half 
of the damper lever thickness where it meets the  push-rod capstan, and 
lengthen the lyre push-rod so that the lever is  horizontal at half damper lift. 
This results in less friction and less  likelihood of squeaks developing between 
the lyre push-rod capstan and the  lever bearing-felt.



 
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