[pianotech] found it was hammer return noise

[Gene Nelson]

Sorry, I did mean lower.
Gene
----- Original Message ----- 
  From: reggaepass at aol.com 
  To: pianotech at ptg.org 
  Sent: Tuesday, March 02, 2010 9:40 AM
  Subject: Re: [pianotech] found it was hammer return noise




    It was a bit counterintuitive to me to have the repetition lever so high but it works.
  Maybe I missed something here, but wasn't Ed recommending LOWERING the repetition lever so there would be MORE contact between the top of the jack and the rep. lever, not RAISING it?


  Alan Eder


  -----Original Message-----
  From: Gene Nelson <nelsong at intune88.com>
  To: pianotech at ptg.org
  Sent: Tue, Mar 2, 2010 9:00 am
  Subject: Re: [pianotech] found it was hammer return noise



    ----- Original Message ----- 
    From: Ed Foote 
      If, by why, you mean, why does it eliminate the knock, I think it is because of friction slowing the jack's speed at the final stop, and the closing geometry effectively letting the jack return be stopped by the button as well as by the knuckle.  
    Regards, 

    Ed Foote RPT
    http://www.uk-piano.org/edfoote/index.html
      
    As the knock that I hear is induced by merely depressing the key only 1mm or 2, the jack does not move off of the button. The jack tail does not get close to the let off button and the hammer only rises slightly and falls to rest, avoiding contact with the rest rail, followed by a woody knock. Sort of a static situation for the jack wouldn't you say?.
    It was a bit counterintuitive to me to have the repetition lever so high but it works.
    I had not considered that the jack stop felt button could have a dampening effect in a static situation like this but it must.
    As others have pointed out, during regular playing when the key is fully depressed, the jack - under certain conditions - can reset with enough force against it's button to create a noise. Making adjustments to slow the jacks return helps reduce or eliminates this noise.
    Thus my dilemma.
    Regards,
    Gene
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100303/83b215bc/attachment.htm>