[pianotech] Action Centers

[William Monroe]

Disconnect the flange cord?  It seems like you can still do this.  Yamaha
pianos present a similar difficulty.  I've found that disconnecting the cord
and holding the flange so there is an equal amount of swing path available
to each side is a decent compromise.  You can't bring the shank up to
horizontal, but that's OK, aim for ~1 swing less.  IMO, the biggest thing is
to be consistent, whichever method you choose.

William R. Monroe


On Thu, Apr 30, 2009 at 2:27 PM, Matthew Todd <toddpianoworks at att.net>wrote:

> 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
>
>
> --- 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> 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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