[pianotech] Weekend puzzler

[Delwin D Fandrich]

The action spread does vary bass to treble but this was not the problem.

 

ddf

 

Delwin D Fandrich

Piano Design & Fabrication

6939 Foothill Court SW, Olympia, Washington 98512 USA

Phone  360.515.0119 — Cell  360.388.6525

 <mailto:del at fandrichpiano.com> del at fandrichpiano.com —  <mailto:ddfandrich at gmail.com> ddfandrich at gmail.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Tom Driscoll
Sent: Saturday, July 16, 2011 1:56 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Weekend puzzler

 

           My last guess. Action spread is off and the Rep levers are dragging on the hammer rail .On firm blow they power through.

        I quit !

 Tom D.

 

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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