---------------------- multipart/alternative attachment Is the jack getting back under the knuckle after a soft blow? I'd check that. Avery At 06:48 AM 7/8/04, you wrote: >On Jul 8, 2004, at 1:10 AM, Alpha88x@aol.com wrote: > >> >> >> >>Greetings, >> >> About a month ago I was called to a Young Chang grand piano. >> The customer complained of one key's hammer not returning after a >> pianissimo (soft) blow. On some forte (harder) blows it didnt return >> either. After taking ourt the action drawer and examining the key's >> power train, I did not see anything visibly that could be causing such a >> thing, except that the hammer was slightly close to the next key's >> hammer. I loosened the key's hammer in question and straighttened it out >> alittle so that it was in line as it should be, and that helped alittle, >> but the sticking hammer remained sticking ...but not quite as often, So >> it alleviated the problem alittle but not all together. > >While providing proper clearance for the moving parts is essential, you >should have also checked the friction in the flanges: hammer, jack, and >wippen. And the purists may even urge you to check the resistance of the >balancier flange. A gram resistance gauge can be very helpful. Oh, and >how is the clearance for the jack in the balancier window? How's the >repetition spring strength? And something that the fellows at the party >*could* have damaged with their antics: is the jack tail firm? They could >have damaged the glue joint between the tail and body of the jack. > >Just a few of the possible causes (tight flanges being my best guess) ... > >Patrick Draine </blockquote></x-html> ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/31/3e/58/45/attachment.htm ---------------------- multipart/alternative attachment--
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