---------------------- multipart/alternative attachment On Jul 8, 2004, at 1:10 AM, Alpha88x@aol.com wrote: > > > > Greetings, > > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 About a month ago I was called to a = Young Chang grand=20 > piano. The customer complained of one key's hammer not returning after=20= > a pianissimo (soft) blow. On some forte (harder) blows it didnt return=20= > either. After taking ourt the action drawer and examining the key's=20 > power train, I did not see anything visibly that could be causing such=20= > a thing, except that the hammer was slightly close to the next key's=20= > hammer. I loosened the key's hammer in question and straighttened it=20= > out alittle so that it was in line as it should be, and that helped=20 > alittle, but the sticking hammer remained sticking ...but not quite as=20= > often, So it alleviated the problem alittle but not all together.=A0 While providing proper clearance for the moving parts is essential, you=20= should have also checked the friction in the flanges: hammer, jack, and=20= wippen. And the purists may even urge you to check the resistance of=20 the balancier flange. A gram resistance gauge can be very helpful. Oh,=20= and how is the clearance for the jack in the balancier window? How's=20 the repetition spring strength? And something that the fellows at the=20 party *could* have damaged with their antics: is the jack tail firm?=20 They could have damaged the glue joint between the tail and body of the=20= jack. Just a few of the possible causes (tight flanges being my best guess)=20 ... Patrick Draine= ---------------------- multipart/alternative attachment A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 1644 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/6a/32/67/7e/attachment.bin ---------------------- multipart/alternative attachment--
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