First grand regulation /Julie

Tom Driscoll tomtuner@comcast.net
Fri, 30 Jan 2004 13:13:39 -0500





> I am doing my first grand regulation and have a question. If the 
> whippen and key capstan have "lost motion" thereby making the key 
> levels have all different heights, then does turning the capstan take 
> care of the key levels as well as adjust the hammer blow distance? In 
> other words are they one and the same adjustment?
>
>               Without having a spec manual, is there a general rule of

> thumb for obtaining the correct hammer blow distance on grands? The 
> piano is a Hazelton Brothers 6' grand.


> rookie,
> Julia Gottchall,
> Reading, PA


Julia,
	With correct key dip, 3/8", 7/16"--(your preference) let off
@1/16" adjust the capstan to achieve correct after touch and don't worry
about the blow dimension. Of course the action can't have serious
geometry problems and there are many more steps to grand regulation such
as prepping to eliminate excess friction etc. ,but I consider key dip
and let off the "sacred" dimensions and after touch the proof of correct
blow.
	Tom Driscoll 


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