<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="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 11 (filtered medium)">  <style>  </style> </head> <body lang=EN-US link=blue vlink=blue> <div class=Section1> Danilo:<o:p></o:p> <o:p> </o:p> If the repetition lever spring can not be regulated to function properly it sounds to me like the pinning is too loose. The repetition lever should have 8 – 10 grams friction. Then the spring can be regulated strongly enough without the big jump of the hammer. If this is the case, even new hammers won’t cure that problem. Re-pin the repetition lever and I think you’ll be able to regulate it.<o:p></o:p> <o:p> </o:p> dp<o:p></o:p> <o:p> </o:p> <div> David M. Porritt<o:p></o:p> <a href="mailto:dporritt@smu.edu">dporritt@smu.edu</a><o:p></o:p> </div> <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 Danilo Perusina Sent: Tuesday, June 19, 2007 6:54 PM To: pianotech@ptg.org Subject: RE: Keep on filing...<o:p></o:p> </div> <o:p> </o:p> <div> Hi! Dean, Tony and David, thanks for your input! I thought the very same, that since these parts need to be replaced, I can use whats left of them to educate myself further. The aim, of course, is to make them perform better. Born out of necessity, actually, a recording session in the middle of the night, not the best time to call a technician! But that was two years ago, and a lot of "seeing and feeling" since then, as well as self-studying and asking technicians that I've met. <o:p></o:p> Parts that need replacement will not respond ideally to being regulated, I guess. This is where the spring tension comes in. I did actually start working on them, and it was then that this problem arose. They are quite tense now, and it indeed causes some hammers to double-blow on the strings. And when I ease them up so that the hammer rises gently when released from check, the jack starts to not wanting to return under the knuckle properly. I was convinced it was due to the reduced weight of the hammers, but you've made me not so sure of that anymore. Knuckles need lubrication? (and replacement?) Spring needs to be cleaned perhaps? By the way, how would you diagnose that a spring needs to be replaced (unless broken of course)?<o:p></o:p> Yes, a mentor would be very welcome, and excuse any language errors, english is not my native tongue. Very glad to hear about your background, Tony!<o:p></o:p> Regards, Danilo<o:p></o:p> </div> <o:p></o:p> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center> </div> Smaka på vårens godbitar! <a href="http://g.msn.com/8HMASVSE/2746??PS=47575" target="_top">Fräscha middagstips på MSN</a> <o:p></o:p> </div> </body> </html>