[pianotech] Action Centers

[William Monroe]

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> 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>
> To: 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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