<div> <font face="Arial, Helvetica, sans-serif">Regulating with metrics has always seemed like such a natural way to do it. </font><font face="Arial, Helvetica, sans-serif"> Maybe it's because I work on more Asian and European pianos than American built instruments, and all of the instruction and other printed material I've seen was metric in nature.</font><font face="Arial, Helvetica, sans-serif">  Dividing and multiplying into 1s, 10s and 100s is far simpler for me than doing the same operations by 64ths, 32nds, 16ths, etc., etc.<br> <br>  <br> </font></div> <div style="clear: both;">Dave Stahl<font face="Arial, Helvetica, sans-serif"></font><br> Dave Stahl Piano Service<br> dstahlpiano.net</div> <div> <br> </div> <div> <br> </div> -----Original Message-----<br> From: Dean May <deanmay@pianorebuilders.com><br> To: 'Pianotech List' <pianotech@ptg.org><br> Sent: Tue, 5 Feb 2008 6:07 am<br> Subject: RE: Regulating With Metrics<br> <br> <div id="AOLMsgPart_2_0102f970-5bf0-421c-8f2e-0fa41101f7b0"> <style></style> <div class="Section1"> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">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. </span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Here’s a rough chart for you:</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1” = 25 mm (25.4)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">3/4 = 19 (19.1)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1/2 = 13 (12.7)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1/4 = 6 (6.35)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1/8 = 3 (3.175)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1/16 = about 1.5 (1.6)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1/32 = about 1 (.8)</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></div> <div> <div class="MsoAutoSig"><b><font color="navy" face="Bradley Hand ITC" size="6"><span style="font-size: 22pt; font-family: "Bradley Hand ITC"; color: navy; font-weight: bold;">Dean</span></font></b><font color="navy"><span style="color: navy;"></span></font></div> <div class="MsoAutoSig" style="margin: 0in 0in 0.0001pt;"><font color="navy" face="Times New Roman" size="3"><span style="font-size: 12pt; color: navy;">Dean May             cell 812.239.3359 </span></font></div> <div class="MsoAutoSig" style="margin: 0in 0in 0.0001pt;"><font color="navy" face="Times New Roman" size="3"><span style="font-size: 12pt; color: navy;">PianoRebuilders.com   812.235.5272 </span></font></div> <div class="MsoAutoSig" style="margin: 0in 0in 0.0001pt;"><font color="navy" face="Times New Roman" size="3"><span style="font-size: 12pt; color: navy;">Terre Haute</span></font><font color="navy"><span style="color: navy;"> IN  47802</span></font><font color="navy"><span style="color: navy;"></span></font></div> </div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></div> <div> <div class="MsoNormal" style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> <hr align="center" size="2" width="100%"> </span></font></div> <div class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> <a href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</a> [<a href="mailto:pianotech-bounces@ptg.org?">mailto:pianotech-bounces@ptg.org</a>] <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> <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br> <b><span style="font-weight: bold;">Subject:</span></b> Re: Regulating Without Specs</span></font></div> </div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> <div 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> On Feb 4, 2008, at 19:20, <a href="mailto:pianotech-request@ptg.org">pianotech-request@ptg.org</a> wrote:</span></font></div> <div 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> OK, Lemme know whatcha think!</span></font></div> <blockquote style="margin-top: 5pt; margin-bottom: 5pt;"> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>  <br> John Dorr, RPT </span></font></div> </blockquote> </div> </div>  <div class="AOLPromoFooter"> <hr style="margin-top:10px;" /> More new features than ever. 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