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<div>David and list,</div>
<div><br></div>
<div>Following my earlier description of using a dial gauge to adjust
the bedding screws, David Ilvedson wrote;</div>
<div><br></div>
<blockquote type="cite" cite>
<blockquote>How do you determine the "precise point of
contact"? </blockquote>
<blockquote><br></blockquote>
<blockquote>>The glide bolt is adjusted down until the dial gauge
reading just starts to move, and until >the precise point of
contact of the glide bolt with the key bed is determined. This
>procedure is repeated for the other glide bolts. The adjustment of
all bedding screws will >take no longer than 5
minutes.<x-tab> </x-tab></blockquote>
</blockquote>
<div><br></div>
<div>The dial gauge is placed right next to the bedding screw you wish
to adjust (be careful to avoid knocking it when adjusting the glide
bolt/bedding screw, and that all screws are first adjusted up away
from contact with the key bed). The instant the bedding screw contacts
the key bed, the dial needle will begin to move. The bedding screw is
backed off a little and then advanced slowly, to just the instant the
needle starts to move again. After all of the bedding bolts have been
set just to meet the key bed, go through them again, turning them down
a further 0.002" (0.05mm). This allows for the key bed to shift a
little with hygrometric changes without developing a knock. I have
found 0.002" to be a satisfactory preload for the Sydney climate,
but in more severe climates where there may be larger swings in
humidity, it might be worth winding the screws in 0.005" or a
little more.</div>
<div><br></div>
<div>If you are adjusting a Steinway, where the keyboard is made with
a slight bow along the front of the key frame, to be higher adjacent
to the touch blocks, don't forget to clamp down the key frame to the
key bed before setting the glide bolts. With these pianos, it's
actually a good idea to fit the touch blocks securely (checking their
downward tension and the guide pin's parallelism to the key bed) prior
to adjusting the bedding screws.</div>
<div><br></div>
<div>A couple of you have emailed me to inform me that your email
program was unable to mount the jpeg image of the dial gauge. For
those of you who obviously do not use Eudora 5.0, I have uploaded the
image to my website for viewing. The image can be found at;</div>
<div><br></div>
<div>http://www.overspianos.com.au/bdsc.jpeg</div>
<div><br></div>
<div>Eudora 5.0 (for both Mac and IBM platforms) can be downloaded for
free from;</div>
<div><br></div>
<div>http://www.eudora.com</div>
<div><br></div>
<div>The address book in Eudora is not very good (when compared to
that of the more primitive claris emailer that I used previously). But
the program is superior in every other way.</div>
<div><br></div>
<div>Regard to all,</div>
<div><br></div>
<div>Ron O</div>
<div>-- <br>
<br>
_________________________<br>
<br>
Website: http://www.overspianos.com.au<br>
Email: mailto:ron@overspianos.com.au<br>
_________________________</div>
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