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<DIV><FONT face=Arial size=2>Just think, no more Chickering Quarter grand. Now
it would be 6mm or .25 Chickering grand. </FONT></DIV>
<DIV><FONT face=Arial size=2>Gerald McC</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=deanmay@pianorebuilders.com
href="mailto:deanmay@pianorebuilders.com">Dean May</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">'Pianotech List'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 05, 2008 8:07
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Regulating With
Metrics</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">A hearty amen. When
going through engineering school we primarily used metrics and even when I
worked in design in industry. It sure did make the calculations easier.
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Here’s a rough chart
for you:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">1” = 25 mm
(25.4)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">3/4 = 19
(19.1)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">1/2 = 13
(12.7)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">1/4 = 6
(6.35)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">1/8 = 3
(3.175)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">1/16 = about 1.5
(1.6)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">1/32 = about 1
(.8)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoAutoSig><B><FONT face="Bradley Hand ITC" color=navy size=6><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 22pt; COLOR: navy; FONT-FAMILY: 'Bradley Hand ITC'">Dean</SPAN></FONT></B><FONT
color=navy><SPAN style="COLOR: navy"><o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig style="MARGIN: 0in 0in 0pt"><U1:PERSONNAME
u2:st="on"><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">Dean
May</U1:PERSONNAME>
cell 812.239.3359 <o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman"
color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">PianoRebuilders.com
812.235.5272 <o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig style="MARGIN: 0in 0in 0pt"><U1:PLACE u2:st="on"><U1:CITY
u2:st="on"><st1:place w:st="on"><st1:City w:st="on"><FONT
face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"><U3:PLACE u4:st="on"><U3:CITY
u4:st="on">Terre Haute</SPAN></FONT></st1:City><FONT color=navy><SPAN
style="COLOR: navy"></U3:PLACE></U1:CITY></U3:CITY> <U1:STATE
u2:st="on"><st1:State u5:st="on"><st1:State
w:st="on">IN</st1:State></U1:STATE></st1:State> <U1:POSTALCODE
u2:st="on"><st1:PostalCode u6:st="on"><st1:PostalCode
w:st="on">47802</st1:PostalCode></U1:POSTALCODE></st1:PostalCode></SPAN></FONT></st1:place></U1:PLACE><FONT
color=navy><SPAN style="COLOR: navy"><o:p></o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
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face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
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</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Jurgen Goering<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, February 04, 2008 11:53
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
pianotech@ptg.org<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B>
Re: Regulating Without Specs</SPAN></FONT><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">At the risk of opening a large can of worms and an
even larger debate, I think this is perfect example of why going metric (like
Dale Erwin demonstrated) is such an elegant mode of transport through
exercises such as these. Mixing fractions with decimal inches may work in this
prepped example, but the numbers are hardly ever so fortuitous. I heartily
suggest to all technicians to immerse themselves in millimeters, stop
converting to inches, buy metric rulers, calipers and whatever other measuring
tools they need and discover the brilliant ease of working in that
system.<BR>ducking for cover...<BR>Jurgen Goering<BR><BR><BR><?/smaller>On Feb
4, 2008, at 19:20, pianotech-request@ptg.org
wrote:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">snip...<BR>Let’s just say you want something typical
like a 3/8” key dip, 1/8” letoff, and .050” aftertouch. (Later I’ll show
the equations for solving for different variables) Given the 3/8”
key dip (.375”) and the .050” aftertouch, we subtract aftertouch from key dip
and know then that we have .325” of useable key dip to move the hammer.
How far will it move? It will move 5xs the amount of keydip. 5 x
.325” = 1.625”. But that’s not the hammer blow distance, because we
haven’t accounted for letoff. If we want 1/8” (.125”) letoff, we need to
ADD that to the hammer travel of 1.625”, so the blow distance is then 1.75”,
or 1 ¾”.<BR> ...snip...<BR><?fontfamily><?param Arial><?smaller><?x-tad-smaller>OK,
Lemme know whatcha think!<o:p></o:p></SPAN></FONT></P><?/x-tad-smaller><?/smaller><?/fontfamily>
<BLOCKQUOTE style="MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><BR> <BR><?fontfamily><?param Arial><?smaller><?x-tad-smaller>John
Dorr, RPT <o:p></o:p></SPAN></FONT></P><?/x-tad-smaller><?/smaller><?/fontfamily></BLOCKQUOTE></DIV></BLOCKQUOTE></BODY></HTML>