[pianotech] Action Centers

[Porritt, David]

Matthew:

Why can't you just disconnect the spring from the cord and swing it?

dp


David M. Porritt, RPT
dporritt at smu.edu<mailto:dporritt at smu.edu>

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Matthew Todd
Sent: Thursday, April 30, 2009 2:27 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Action Centers

Yeah, I normally do the swing test as well.  But this is a Kawai with the flange cord.
TODD PIANO WORKS
Matthew Todd, Piano Technician
(979) 248-9578
http://www.toddpianoworks.com<http://www.toddpianoworks.com/>


--- On Thu, 4/30/09, William Monroe <bill at a440piano.net> wrote:
From: William Monroe <bill at a440piano.net>
Subject: Re: [pianotech] Action Centers
To: pianotech at ptg.org
Date: Thursday, April 30, 2009, 7:24 PM
Different strokes.  If I measure with a gram gauge I'll taper the friction, higher in the Bass (~5g), lower in the Treble (~3g).  Usually I measure with the swing test, aiming for the same number of swings Bass to Treble - about 6 swings, depending upon the season/humidity.  When I taper the gram friction readings, I'm essentially trying to produce this even swing result.  Heavier hammers with more inertia will produce more swings than a lighter hammer for the same gram friction.

William R. Monroe
On Thu, Apr 30, 2009 at 12:59 PM, <wimblees at aol.com<mailto:wimblees at aol.com>> wrote:
There should not be any difference between bass and treble. I don't know what an acceptable reading would be, because I've never measured one. As I said, test about a dozen flanges, and take an average.

Wim

-----Original Message-----
From: Matthew Todd <toddpianoworks at att.net<mailto:toddpianoworks at att.net>>
To: pianotech at ptg.org<mailto:pianotech at ptg.org>
Sent: Thu, 30 Apr 2009 5:31 am
Subject: Re: [pianotech] Action Centers
When I use the gram gauge, what is an acceptable reading?  Will it vary from bass to treble?
TODD PIANO WORKS
Matthew Todd, Piano Technician



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