Ratio question

[David Ilvedson]

But if the key is raised the capstan will move back slightly and that would have some effect on action mechanics...?

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Jon Page" <jonpage at comcast.net>
To: pianotech at ptg.org
Received: 5/11/2008 9:44:36 AM
Subject: Ratio question


>>Is there a ratio that can be looked upon as a standard with
>>the following scenario:
>>If you increase the key height by ... , you will increase
>>dip by ... .  Something tells me it's not a 1:1 ratio.

>Where'd you get that something?...

>If you raise the key height 1mm, the dip will increase the same amount; 1:1.

>The only ratio aspect which is different and non-applicable is that
>the key height increases a smaller percentage than the dip:
>62 mm key height increased to 63 mm is a .016% increase
>10 mm dip increased to 11 mm is a 10% increase.
>But has no bearing on anything.
>-- 

>Regards,

>Jon Page