<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:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <meta name=Generator content="Microsoft Word 12 (filtered medium)"> <style>  </style>  </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'>Hi David:<o:p></o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'>If my memory serves me, you said in an earlier post that this was a Kohler and Campbell, which would make it a Samick product. When you go back to the piano, I would take string height measurements, hammer center pin height, and calculate what the hammer bore should be. Then compare that to the hammer bore that you measure off the hammer itself. Years ago I was regulating a small Samick grand that just didn’t want to regulate right. The hammer bore was off by about Ľ”. A tell tale sign of this kind of trouble will be that, when you have set the blow distance to roughly the factory spec, the knuckle core and the jack don’t line up in that straight line we all like to see. <o:p></o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'>It’s never a bad idea for any regulation job you are doing on a “new to you” customer piano to do a quick and dirty hammer bore distance check prior to beginning your regulation sequence. It helps you avoid the creeping “There’s something rotten in Denmark “ feeling that is then followed by “Oh, s..t”, when you realize that you are 2/3 of the way through the job and the piano’s geometry problems have painted you into a corner. When you have hammer bore distances that are gonzo like the above, the only solution is a new set of properly bored hammers, which means your labors have been wasted. <o:p></o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'>When at let off, check to see what the distance from the bottom of the hammer tail to the top of the back check is. If the bottom of the tail is a half mile above the top of the back check, that’s another warning sign. <o:p></o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'>Will Truitt<o:p></o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:#1F497D'><o:p> </o:p></span></p> <div> <div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'> <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <b>On Behalf Of </b>David Nereson<br> <b>Sent:</b> Friday, June 13, 2008 1:18 AM<br> <b>To:</b> Pianotech List<br> <b>Subject:</b> no hammer rise<o:p></o:p></span></p> </div> </div> <p class=MsoNormal><o:p> </o:p></p> <div> <p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif"'>Thanks for all the responses.  The action has been completely regulated and everything is as it should be except the hammer rise.  </span><o:p></o:p></p> </div> <div> <p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif"'>    Got busy all the sudden and haven't had time to double-check the things in your responses (I don't have the piano in my shop), but will soon.</span><o:p></o:p></p> </div> <div> <p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif"'>    I'm quite certain that neither the hammers nor rep. levers are pinned too tightly, and I know the drop is only 1/8" or less.  Even when the rep. springs are compressed to their max. (made strongest), there's still no rise.  </span><o:p></o:p></p> </div> <div> <p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif"'>    I'll have to check the backchecks again, but I know checking distance is in the right neighborhood.  </span><o:p></o:p></p> </div> <div> <p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif"'>    Thanks.  </span><o:p></o:p></p> </div> <div> <p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif"'>    --David Nereson, RPT</span> <o:p></o:p></p> </div> </div> </body> </html>