<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/>  <style>  </style> </head> <body lang=EN-US link=blue vlink=blue> <div class=Section1> <o:p> </o:p> <o:p> </o:p> <div> Dean<o:p></o:p> Dean W May                (812) 235-5272 voice and text <o:p></o:p> PianoRebuilders.com    (888) DEAN-MAY        <o:p></o:p> <ST1:PLACE u1:st="on"><u4:CITY u1:st="on"><u2:place u3:st="on"><u2:City u3:st="on"><st1:place w:st="on"><st1:City w:st="on">Terre Haute</st1:City></st1:place></u2:place></st1:place></u4:CITY> <U2:STATE u1:st="on"><u2:State u3:st="on">IN</u2:State></u2:State></U2:STATE> <U2:POSTALCODE u1:st="on"><u2:PostalCode u3:st="on">47802</u2:PostalCode></u2:PostalCode></U2:POSTALCODE><o:p></o:p> </div> </ST1:PLACE> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Ed Foote Sent: Thursday, July 26, 2012 10:25 PM To: pianotech@ptg.org Subject: Re: [pianotech] balance hole jig<o:p></o:p> </div> <o:p> </o:p> <o:p> </o:p> <div> -----Original Message----- From: jim <jim@grandpianosolutions.com> <o:p></o:p> </div> <div> <div id="AOLMsgPart_0_754c45bc-a0c2-417f-aa3c-4d698ca5e936"><pre style='background:white'>>> I've only dealt <o:p></o:p></pre><pre style='background:white'>with the half round dowels once so far. Seems like a good idea.  On a <o:p></o:p></pre><pre style='background:white'>short key stick, as opposed to the long D sticks I think you're talking <o:p></o:p></pre><pre style='background:white'>about, what are the down sides of the half dowel?  Do they jump around, <o:p></o:p></pre><pre style='background:white'>click? Do they create an unstable key height in any way, or are they as <o:p></o:p></pre><pre style='background:white'>good an idea as they seem? (there's mostly always engineering tradoffs)<o:p></o:p></pre><pre style='background:white'> <o:p></o:p></pre><pre style='background:white'><o:p> </o:p></pre><pre style='background:white'>Greetings, <o:p></o:p></pre><pre style='background:white'>   It seems I was told, at the factory, back in the late 1970's, that the original idea with the accelerated action was that the hole was a little offside, so that the point of fulcrum would move proximally as the key was depressed.  Much like the cut punchings.   This would accelerate the action ratio throughout the keystroke, giving you maximum leverage at the beginning, progressing to maximum velocity at the very end. 'From low gear to high gear in .390".     At least, in theory.  I have never been around an artist that could tell the difference, and the biggest effect to me is, as Ron said, it makes key work more difficult.  <o:p></o:p></pre><pre style='background:white'>     I would opt for a a stiffer key with sole and top plates instead of the thinner ones sitting atop the half-rounds. <o:p></o:p></pre> <div><pre style='background:white'>Ed Foote RPT http://www.piano-tuners.org/edfoote/well_tempered_piano.html<o:p></o:p></pre></div> <div><pre style='background:white'><o:p> </o:p></pre></div> </div> </div> No virus found in this message. Checked by AVG - <a href="http://www.avg.com">www.avg.com</a> Version: 2012.0.2197 / Virus Database: 2437/5157 - Release Date: 07/26/12<o:p></o:p> </div> </body> </html>