[pianotech] regulation "sweet" spot

[Marcel Carey]

Or jack position front to back or height in the rep window.Marcel CareyFrom: B214cm at aol.comDate: Tue, 20 Jan 2009 09:21:23 -0500To: pianotech at ptg.orgSubject: Re: [pianotech] regulation "sweet" spot






It could be several things but I'd look at  the key dip spec because 
it sounds like you're not getting enough after touch on the problematic 
offenders. Key height and dip should be set before any regulation begins.
 

In a message dated 1/20/2009 9:13:02 A.M. Eastern Standard Time, 
hoppsmusic at hotmail.com writes:
Hello 
  again, I have installed new hammers on a baldwin grand and am now 
  doing the regulation.  I have followed all recommended steps and things 
  are going smoothly.  (This is my first full grand regulation).  I am 
  having some trouble on a few notes not finding that "sweet" spot of let-off to 
  drop ratio or point.  I am using a let-off rack set to baldwin spec of 1" 
  7/8" and have levelled the hammers for a proper blow distance.  The 
  majority of the notes are good and behave as expected. i.e. a slow rise of 
  hammer to a 1/16" below string strike with a 1/8" drop with that little bump 
  (what I call the sweet spot) in the feel of the key as you play.  Granted 
  on the good ones some of the "bumps" are stronger than others but on some it 
  is very weak or on the bad notes it is not present at all.  
   The questions I have are: 1.  What should I do 
  when I can not get the two Let off and drop to reconcile?  (good rise vs. 
  too much drop or poor rise with that magic bump in the 
  feel) 2.  If I get the regulation button turned so low that 
  there is no more turn left and I am not getting good results what should I do 
  after starting back at beginning of that notes regulation? This 
  action is about 30 years old and to my knowledge has never had any 
  regulation.  Any help or suggested reading would be appreciated.  I 
  have all Pace resources and Reblitz but recommended order of regulation is not 
  helping with the reality of regulation problems. Thanks again to 
  all who help so willingly, Steven
  
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