Key Excursion

[Roger Jolly]

Hi David,
                 You can try this as an experiment.
Cut a strip of bushing cloth and insert it under the key end bolster 
cloth to raise the end of the key,
Regulate mid C to mid E.     Check the jack position 
carefully.      Re install key board cover and key slip to make sure 
all is well.
You may need to install thinner front rail punching's (cloth)  the 
crescendo punching's are excellent for this.
Most pianos are about a 2:3 ratio from bolster cloth region to the key front.
I have done this a few times with satisfaction.

Regards Roger





At 06:07 PM 4/17/2006, you wrote:
>Interesting that you should bring this up as I have a customer recently who
>claims that his 9' piano has too much inclination and wants it altered.  It
>has made me begin to think about what the optimum inclination might be.  It
>will vary from piano to piano and with key length, of course.  The piano
>itself will limit the kinds of changes one can make.  For example, by the
>height of the fall board when in the up position, the thickness of the
>keyframe at both the back and the front, convergence limits, height of the
>wippen cushion over the key/capstan position, damper timing consideration,
>etc.. It seems like the key certainly has to start with an upward
>inclination.  Whether it travels through level and finishes with a downward
>inclination or finishes at level and then to what degree seems to be the
>question.  Wish I had an answer as I will be having to try and figure out
>just what the best solution is for this person fairly soon.
>
>David Love
>davidlovepianos at comcast.net
>
>-----Original Message-----
>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
>Of Jon Page
>Sent: Monday, April 17, 2006 4:57 PM
>To: pianotech at ptg.org
>Subject: Key Excursion
>
>OK...
>
>I'll bring the topic up again soon.
>
>Am I the only one to notice advantages to key inclinations??
>--
>
>Regards,
>
>Jon Page
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