Aftertouch

[piannaman at aol.com]

I'll third the motion for Wurzen punchings.  I have them in my piano and have put them in a couple others in the field.  They give great definition to the bottom of the keystroke, and thus to aftertouch.   With mushy punchings, amount of aftertouch can depend on how strong one's fingers are feeling on a  particular day...
 
Dave Stahl


 
 
-----Original Message-----
From: Erwinspiano at aol.com
To: tcole at cruzio.com; pianotech at ptg.org
Sent: Sat, 4 Nov 2006 4:51 PM
Subject: Re: Aftertouch


      HI Jon
    oh,oh,oh...hmm... After touch....see Yamaha definition/class.  Key dip measured where? is always the question that needs to be answered first.  Yamaha's measure 10 mm at the front of the white key.  Steinways & most others I measure at the pin with a gauge fitting between the bottom of the key & the punching. I am a dip priotiy regulator meaning I,m looking for .390 ish dip/total key travel at the pin.  After setting this dip Find a hammer blow distance that will just allow the jack to  just start to  escape when you put a .050 card board punching on top ot the front rail felt.  If you do this on each key as a check you will have quite a uniform feel.
  Also go with Tom Cole's advice about Wurzen punchings.  Regular green one will compress .035 the Wurzen only about .015 even on a hard blow.  It gives a very precise & limited key travel & will also enhance the sound by limiting energy loss in the key.
   Dale Erwin
Jon,

When you say spongy, I'm led to think that the front rail punching's 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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