Key Excursion

[David Ilvedson]

Sounds like if you check all of the things you mentioned and tried altering a test note or 2 like Roger wrote...checking those same specs you will find out pretty quickly how much you can change...I think there is a slight tip downwards toward the action in most pianos...

I bet if you let the pianist know what this may cost him when you factor in all of the changes...the inclination won't seem so bad...;-]

David Ilvedson, RPT
Pacifica, California



----- Original message ----------------------------------------
From: "David Love" <davidlovepianos at comcast.net>
To: "Pianotech List" <pianotech at ptg.org>
Received: 4/17/2006 5:07:00 PM
Subject: RE: Key Excursion


>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