[pianotech] Weekend puzzler

[Tom Driscoll]

OOOOPS,
 I just read the post that stated the problem was on the bench also. And I was so sure I had the correct answer ! 
Tom D.----- Original Message ----- 
  From: Tom Driscoll 
  To: pianotech at ptg.org 
  Sent: Saturday, July 16, 2011 4:37 PM
  Subject: Re: [pianotech] Weekend puzzler


  Forget my last guess.
   I think it's the sostenuto tabs engaging the rod on the way up . On a hard blow they power through. On a light blow they drag and the resistance is felt at the key.

  Tom Driscoll



  On 07/16/11, Mark Schecter<mark at schecterpiano.com> wrote:
  Side of knuckle dragging on next repetition lever? Caused by knuckle squishing (technical term) sideways combined with bad travelling on the adjacent wippen?

  -- Mark Schecter





  On Jul 16, 2011, at 1:09 AM, "Delwin D Fandrich" <del at fandrichpiano.com> wrote:


    The piano is a 1928 Chickering Model M, Scale 141 (small concert size). The problem is this:



    As the key is depressed slowly—pianissimo—for the first millimeter or so the key and hammer move smoothly. Then something starts binding, it feels like something in the action is dragging, holding the key and action back. After forcing the key down another three or four millimeters action becomes free and everything operates normally. On a medium to hard blow there is good power and the problem is hardly noticeable but at pianissimo the action will hardly play.



    What is the problem and what caused it?



    ddf



    Delwin D Fandrich

    Piano Design & Fabrication

    6939 Foothill Court SW, Olympia, Washington 98512 USA

    Phone  360.515.0119 — Cell  360.388.6525

    del at fandrichpiano.com — ddfandrich at gmail.com


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