Aftertouch

[David Love]

I use a .030 punching to set uniform aftertouch.  Seems to be about right.
Cut a .030 card punching so that it can be slipped onto the front rail pin
without lifting the key.  With the .030 card inserted adjust the dip so that
the hammer just lets off with light pressure.  When you remove the card you
will have adequate jack clearance from the knuckle which is really what
aftertouch is all about.  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Farrell
Sent: Saturday, November 04, 2006 6:07 PM
To: Pianotech List
Subject: Re: Aftertouch

 

Some would say 0.025" is a nice aftertouch. One-eight-inch aftertouch would
be on the order of  0.125" - that's huge!

 

TF

----- Original Message ----- 

When you say spongy, I'm led to think that the front rail punchings are what
you're talking about. Try a set of Wurzen felt punchings
(http://www.pianofortesupply.com/) and see if that helps.

Key dip is typically 10 mm, a bit more than 3/8". Aftertouch might be a
little less than 1/8" (of key dip); check for the jacks clearing the
knuckles by a 1/32". 

Tom Cole

J W Stein wrote:





Hi Folks, 

 

 

Here is a question regarding regulation of aftertouch when depressing keys.
When regulation actions, I like to break key movement into eighths.  I
figure that most normal key depths are 3/8 inches.  Thus, the first 2/8 of
movement is smooth..then there is that last 1/8 if aftertouch.  I like to
feel the slight hesistion (clicking feel).  However, there are times when
that aftertouch feels too spongy regardless of what I do....jack
regulations, drop, let off, etc....   About the only thing that seems to
help is a slight increase of depth....but why would most keys have the
"normal" feel of aftertouch, while a few are unresponsive...????? 

 

 

Any ideas? 

 

Jon 

 

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