---------------------- multipart/alternative attachment Hi Julie Welcome to the list. And congrats on finishing school. You make a good point, which Dale was in and on about in an earlier post. Your "clue" in your last statement is exactly the kind of thing that shows up immediatly when takeing both UW and DW measurements and figureing friction and balance weight. The initial query was both about the recurrance of high DW, and about the complaint of too heavy an action which was hurting the pianists wrist. We were given a DW of 65 to go on. Say we had 20 grams of friction due to this hypothetical problem with humidity.... What Balance Weight does that necessitate, and what does that tell us about the heavyness of the action ? Its a good puzzle as presented by Carol. And I think the immediate response is to get more info. Cheers RicB Alpha88x@aol.com wrote: > Carol, > > I am only a rookie out of piano tech school, but possibly the > center pin bushings in the hammer flanges could be swelling (due to > humidity) and this could be causing a "drag" if you will, making > center pins' tighter, the motion stiffer, hence, the keys harder to > depress, and shows up interpreted as a heavier weight. I am guessing a > clue would be how fast (or rather sluggish) the hammers return to > their rest rail or pads. > > Julie Gottchall, > Reading, Pa -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/45/a3/3c/fa/attachment.htm ---------------------- multipart/alternative attachment--
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