Aftertouch

[David Skolnik]

Except Jon says that only a few of them feel that way. In fact, the 
question he asks is too general to be able to offer a "cure".  If he 
had a particular piano in front of him, he could try any number of steps.
-Check jack position under knuckle.
-Shape and or position of particular knuckle.  Sometimes they're not 
consistently alligned.  (New or worn?)
-Friction at action centers - jack, wippen, shank, damper lever.
-Timing of jack / rep. lever contact.
-Clearance of knuckle by jack
-Rep. lever height
-Strength of rep spring
-Damper timing and stop rail clearance

But will we ever know?

David Skolnik



At 05:23 PM 11/4/2006, you wrote:
>Jon,
>
>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/>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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