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<DIV><FONT face=Arial size=2>I think that what I do in effect is what you
suggest. I just do the hammer weight calibration after assembly. So it's the
strike weight calibration. I'm saying the hammer weights I have measure over the
last few years are much smoother than they used to be so I'm beginning to assume
(look out) that this will result in the least amount of hammer manipulation in
calibration.</FONT></DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>Chris</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=davidlovepianos@comcast.net
href="mailto:davidlovepianos@comcast.net">David Love</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=caut@ptg.org
href="mailto:caut@ptg.org">'College and University Technicians'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 19, 2008 12:55
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [CAUT] Shank to Hammer
weight spreadsheet</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">As an addendum to
this, what makes more sense to me, if you are going to sort shanks, is to
prepare the hammer set, weigh each hammer and alter the ones necessary so that
the hammer weights themselves are a smooth progression. Then weigh the
</SPAN></FONT><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">SW</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> of each shank and
sort them from heaviest to lightest. Then put the hammers and shanks
together with the heaviest shank at #1 etc.. That way you will have a
smooth total </SPAN></FONT><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">SW</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> and the distributed
</SPAN></FONT><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">SW</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> relationship between
shank and hammer would progress uniformly through the set. The resonance
thing does complicate things though, doesn’t it?
</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV>
<P><FONT face="Times New Roman" color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy">David Love</SPAN></FONT><FONT color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy"><BR>davidlovepianos@comcast.net<BR>www.davidlovepianos.com</SPAN></FONT><FONT
color=navy><SPAN style="COLOR: navy"> </SPAN></FONT></P></DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B></SPAN></FONT><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">David
Love</SPAN></FONT><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, February 19, 2008 9:28
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> '</SPAN></FONT><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">College
and University Technicians</SPAN></FONT><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">'<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [CAUT] Shank to Hammer
weight spreadsheet</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I guess
I haven’t found that kind of variation in the shank weight (at least of
similar diameter) to make it worth while to weigh and sort. I’m using
pretty much exclusively Renner parts, maybe some others have more variation.
The tapering does get a fairly even weight through the hammer set and
after dry assembling and measuring SW’s I’m rarely altering more than 1/3 of
the set and usually the alterations are less than .3 grams.
Mostly, I try to go up rather than down since once I’m through tapering
the set, I prefer not to go back but if I do it’s rarely for more than a
couple of tenths and has no ill effects in terms of appearance.
</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Are you
suggesting that it may matter whether the SW distributional difference of
even, say, .5 grams matters whether it’s located in the shank versus the
hammer in terms of inertia? Hard to imagine at that level that would
really make any perceptible difference since some portion of that additional
weight in the shank would have to be distributed out toward the hammer anyway,
one would assume.</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">If you
wanted to get very picky about potential tonal differences it might be worth
considering the variations in flexibility between shanks of equal diameter.
Certainly rib flexibility (or stiffness) varies with ribs of the same
dimension, why not shanks, I suppose. Maybe that’s what the shank
resonance thing speaks to—and perhaps the weight indirectly. At this
point, I’m not convinced that other aspects of tonal variation (like
soundboard resonances for example) so complicate teasing out that variable
that it’s worth the trouble. At a certain point, no matter what you do,
voicing needs to be the last line of defense. The point at which each
tech decides to put that into play, of course, will vary.
</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV>
<P style="MARGIN-LEFT: 0.5in"><FONT face="Times New Roman" color=navy
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy">David
Love<BR>davidlovepianos@comcast.net<BR>www.davidlovepianos.com</SPAN></FONT><FONT
color=navy><SPAN style="COLOR: navy"> </SPAN></FONT></P></DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Jon Page<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, February 19, 2008 8:52
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
caut@ptg.org<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [CAUT]
Shank to Hammer weight spreadsheet</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<BLOCKQUOTE style="MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face=Arial color=black
size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: Arial">...Once I'm done
with that I simply dry assemble the shanks and hammers
and</SPAN></FONT></P></BLOCKQUOTE>
<BLOCKQUOTE style="MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt" cite="" type="cite">
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face=Arial color=black
size=3><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: Arial">then
use the Stanwood scale to weigh the SWs. I chart those and then
figure</SPAN></FONT></P></BLOCKQUOTE>
<BLOCKQUOTE style="MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt" cite="" type="cite">
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face=Arial color=black
size=3><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: Arial">out
where I have to alter them to achieve a smooth
curve</SPAN></FONT>...</P></BLOCKQUOTE>
<DIV>
<P class=MsoNormal
style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 1in; MARGIN-RIGHT: 0in"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">I seems you are 'final fitting' your SW
irrespective of the shank strike weight (SSW).</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">If you initially taper your hammers to a
close margin, then you are throwing</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">the curve off with jumbled shanks and
changing the mass of the hammer due</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">to shank
irregulatities.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">It would be more advantageous to match
similiar SSW groups to your hammers</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">which have been mass calibrated, thus
reducing alteration. Ultimately, this is</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">the most thorough method ineritally
speaking.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">I simply mate the SSW with hammer weight
to target a curve because does it</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">really matter since it is at the end of
the compound leverage system. Are you</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">feeling hammer inertia or weight at the
front of the key. Or what degree is it</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">important (inertia at the end of the
system) ans opposed to good inertial</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">effect at the front of the
key.</SPAN></FONT></P></DIV><PRE style="MARGIN-LEFT: 1in"><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt"><X-SIGSEP>-- </SPAN></FONT></PRE>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 1in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"><BR></X-SIGSEP>Regards,<BR><BR>Jon
Page</SPAN></FONT></P></DIV></DIV></BLOCKQUOTE></BODY></HTML>