On Sep 25, 2010, at 11:28 AM, Edward Sambell wrote: > The reason is that the keys are too front heavy, or, as in a piano > made here in Canada, the capstans have been installed too far forward. Hi Ted, I think you have analyzed it well, and it is a common problem. It is exacerbated by wippen cushion dimpling and friction between the cushion and the capstan, which should be addressed first. It can sometimes be alleviated by increasing jack spring tension, which will mean the jack is pushing against the butt leather and assisting the reset a little more. But I usually just add lead to the backs of the keys, as the most efficient way to solve the problem. It usually only takes a single smallish lead fairly close to the capstan, and when there are only a few offenders, I sometimes have just glued it on top of the key. I have a Wurlitzer console player (1960s-70s Aeolian mechanism) with that same problem, and so getting the keys out is a major operation. Hence, I have glued maybe 15 - 20 leads to the tops of keys, with no problems over a period of a few years. A fairly large amount of titebond so it forms a collar, and they stay fine. Another option is jiffy leads, which can be cut in two and screwed on (a whole jiffy lead is a lot of overkill). Regards, Fred Sturm fssturm at unm.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20100925/9a27e420/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC