More on hearing protection

[John M. Formsma]

Bob,

With the small amount of pressure applied, I doubt it would do anything to
the agraffe. It's only flexing at the termination point rather than cutting
into it.

Would you think pressing on the string to check damper traveling would cause
any damage to the agraffe? If not, then this wouldn't either, because it's
about the same or less pressure.

John Formsma

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Bob Hull
Sent: Saturday, June 10, 2006 10:55 PM
To: Pianotech List
Subject: RE: More on hearing protection

John,

While we're trying to protect our ears, we need to
also protect the piano.  Has anyone talked about the
need to be careful with the agraffe bearing surfaces? 
If we press too hard on the string in the direction
that would cause it to cut into the agraffe  bearing
surface, it seems like that would potentially damage
the surface and set up a poor termination.  I'm
thinking that if you push sideways or down and to the
side as you described- that should be safe.  The
termination point of the string is in the top of the
agraffe hole and hopefully?? not in the "line of fire"
for this procedure.

Also, there maybe similar danger in over-agressive use
of the string hook.  I would like to hear what Paul
Revenko-Jones or anyone else that has done some up-
close photography on agraffes, thinks about this
string
setting procedure.  I'm not sure how much pressure it
takes to cause the string to deform the brass.

Bob H.
> 
>   _____  
> 
> From: pianotech-bounces at ptg.org
> [mailto:pianotech-bounces at ptg.org] On Behalf
> Of pianotune05 at comcast.net
> Sent: Saturday, June 10, 2006 7:28 AM
> To: Pianotech List
> Subject: RE: More on hearing protection
> 
>  
> 
> Hi John,
> 
> so in a sense, if I'm working on my wife's Kimball,
> Lord help me, :) I push
> the string in toward the plate?  Also, we're doing
> one string at a time not
> the entire tri chord and bi chord or single wound
> string?  sorry if this is
> obvious.  Sometimes I have trouble visualizing the
> procedure.  I'm glad
> you're patient with me or anyone else who is as
> dense as I am. lol :) or
> what might apear that way of course.
> 
> Marshall
> 
>  
> 
> -------------- Original message -------------- 
> From: "John M. Formsma" <john at formsmapiano.com> 
> 
> Richard,
> 
>  
> 
> Moving the string down (or toward the bridge pin at
> an angle) just a bit
> from its normal plane. It's kind of like pressing
> down on the strings to see
> if the damper follows the strings. No need to do
> more than that.
> 
>  
> 
> John Formsma
> 
>  
> 
> 


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