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Hi Julie
<p>Welcome to the list. And congrats on finishing school. You make a good
point, which Dale was in and on about in an earlier post. Your "clue" in
your last statement is exactly the kind of thing that shows up immediatly
when takeing both UW and DW measurements and figureing friction and balance
weight.
<p>The initial query was both about the recurrance of high DW, and about
the complaint of too heavy an action which was hurting the pianists wrist.
We were given a DW of 65 to go on. Say we had 20 grams of friction due
to this hypothetical problem with humidity.... What Balance Weight does
that necessitate, and what does that tell us about the heavyness of the
action ?
<p>Its a good puzzle as presented by Carol. And I think the immediate response
is to get more info.
<p>Cheers
<br>RicB
<p>Alpha88x@aol.com wrote:
<blockquote TYPE=CITE><font face="Arial"><font size=-1>Carol,</font></font>
<p><font face="Arial"><font size=-1>
I am only a rookie out of piano tech school, but possibly the center pin
bushings in the hammer flanges could be swelling (due to humidity) and
this could be causing a "drag" if you will, making center pins' tighter,
the motion stiffer, hence, the keys harder to depress, and shows up interpreted
as a heavier weight. I am guessing a clue would be how fast (or rather
sluggish) the hammers return to their rest rail or pads.</font></font>
<p><font face="Arial"><font size=-1>Julie Gottchall,</font></font>
<br><font face="Arial"><font size=-1>Reading, Pa</font></font></blockquote>
<p>--
<br>Richard Brekne
<br>RPT, N.P.T.F.
<br>UiB, Bergen, Norway
<br><A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A>
<br><A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A>
<br><A HREF="http://www.hf.uib.no/grieg/personer/cv_RB.html">http://www.hf.uib.no/grieg/personer/cv_RB.html</A>
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