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In response to:<br><br>
<font color="#008080">Date: Tue, 08 Jul 2008 02:10:25 -0400<br>
From: David Skolnik <davidskolnik@optonline.net><br>
Subject: Re: Keyframe Bedding <br>
<blockquote type=cite class=cite cite="">- are dags essential to proper
function of the action? i.e.: would back rail [necessarily] slap in their
absence?</font></blockquote><br>
<blockquote type=cite class=cite cite="">At 07:41 AM 7/8/2008, Ron
wrote:<br>
Dags aren't even necessary to the proper function of the action, much
less essential. They're there to keep the action in place during
moving.<br><br>
Consider: If the dags held down the back action rail and prevented
slapping without binding, the fit would have to be absolutely perfect,
with no tolerance for wear or seasonal dimensional changes.<br><br>
Ron N</blockquote><br>
I was responding to this, from Dale Erwin:<br><br>
Sent: Mon, 7 Jul 2008 2:33 pm<br>
Subject: Re: Keyframe Bedding<br><br>
<blockquote type=cite class=cite cite="">The back of the frame is held
down by the dags & the ends by the key blocks<br>
Actually this is also a bit of a buffer or safety factor for
climate changes. This way the bolts will hopefully stay in contact with
the bed in each season & not be so prone to change with humidity
& temp.<br>
Dale</blockquote><br>
My assumption has been as Ron stated, thus calling to question a basic
factor of the tensioning procedure described. Also, I assumed, some
time ago, when I began to see new Steinways with excessively turned-down
glide bolts, that the rational was, in fact, to minimize seasonally
generated bedding problems, however, when re-regulated to correct for the
symptoms I listed:<br>
<blockquote type=cite class=cite cite=""><i><x-tab>
</x-tab>- increased
resistance of una corda shift<br>
<x-tab> </x-tab>-
premature squeaking at glide contact<br>
<x-tab> </x-tab>- increase
in friction and wear of keyblock plates and frame guide
pins</i></blockquote><br>
I would lose most, if not all after-touch. I saw it as no more than
a manufacturing expediency.<br><br>
Thus far, I can accept the need to limit as much as possible energy
transfer to the key frame. I don't, at this point, understand treating
the frame as a resonant structure, whose properties would be enhanced by
the introduction of 'tensioning stress'. If that stressing does, in
fact, enhance the frames rigidity, it seems desirable only to the extent
that it does not negatively impact the action's functioning, as
described.<br><br>
David Skolnik<br>
Hastings on Hudson, NY<br><br>
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