[pianotech] Young Chang Growing Brackets

[Will Truitt]

Hi David:

 

Thanks for your input.  I appreciate the little bit of hand holding here.  I
trust my feel of an action as my final arbiter too - I have regulated plenty
of actions that were "correct" by the book, but did not feel right.  Digging
deeper yielded other problems, which were then resolved and ended up with a
good feeling and better performance.  

 

Of course, you are right about the bad assumption and specs guide.  You and
I have NEVER seen an action that was not properly set up at the factory
right?  :-)  The specs are only a reference point and a point of departure
as needed, but they do have value up to that point.  

 

The balance weight is a bit stout, but this is after all a Korean action.
The knuckle leather is a bit sloppy, and snugging them up with thin bushing
cloth would improve this, along with lubrication.  

 

As for dip, I am usually an aftertouch priority type of guy, and set even
aftertouch rather than dip.  But, it would appear from my samples that the
two are not in particular disagreement anyway.  The string height -hammer
bore relationships appear that they are not going to skew these values .  

 

Will

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of David Andersen
Sent: Wednesday, January 28, 2009 2:44 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Young Chang Growing Brackets

 

 

On Jan 27, 2009, at 4:20 PM, Will Truitt wrote:





The only thing that is holding me back is the fact that I am having to lower
the capstans to achieve the 47 mm blow distance, and remove punchings to get
the 10.2 mm dip (which yields plenty of aftertouch). 

So what? If everything works, and clears, you're good. 47mm blow and 10.2 mm
key travek is about  is about ideal. With a Balance Weight of 42, it's a
little stout for my taste; maybe that can be helped with lubrication, close
checking, and agressive distal jack position (moved toward the player.)

 





That part is odd, but I am assuming that the piano was set to the correct
values for blow and dip at the factory way back when. 

Bad assumption, and remember: specs are a guide only. Each action is custom.

 

David A.

 

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