---------------------- multipart/alternative attachment You got it TOYOTA! <G> Do it this way even when you don't think there is a problem, and note the results. You are going to be surprised. On some Concert grands for favorite pianist, I will have the cheek blocks in and tight, and just tension the rail a little, then restore after touch by lowering the hammer line. Neat trick for a big concerto, for a not so big piano. Shush! did I say that. Have a good week end. Roger At 12:49 PM 5/23/2003 +0200, you wrote: >Thanks muchly Roger... > >seems to be the description that makes the most sense so far. Very roughly >then, adjust the glide bolts so that they all are in contact with the bed, >AND all lift the balance rail to the point that the Front Rail is just a >nats butt away from being lifted as well... > >Key height and the rest is set afterwards. > >Correcto ? > > >Roger Jolly wrote: >>Hi Avery & Ric, >> I have a good minds eye view, of what is going >>on, but I'm not so sure I can explain it well. But here goes. (Send me a >>deluxe flame suit Conrad). >> >>If you have the bolts just touching, there is no compression force acting >>on the balance rail. With rapid forceful playing, there is a small amount >>of bounce taking place at the balance rail, robbing the action of a lot of >>energy. It gets dissipated within the frame. >>Jack the bolts a little further down, you start to bow the cross >>struts. and putting some compression into the rail. , and firmly seating >>it to the bed. At the Yamaha Technical Academy, they spend a good deal of >>time teaching you how to tune these rails in aurally. takes more than a >>little practice to get optimum results. >>The front rail is done first, by tapping on the front rail with a kind of >>45 degree blow, to the leading edge of the rail. (You can hear better than >>the traditional method of holding a key down and thumping on the key, the >>front rail punching absorbs a lot of noise,) Then the bolts are adjusted so >>the front rail just starts to lift, then back off about 1/4 turn. Next >>step is get all the glides bedded so the tone is the same when lifting up >>on the hammer rail, and thumping down on the balance rail. >> >>The closest analogy I can think of, is like string bearing across the >>bridge. Too much bearing and a loss of tone, too little loss of tone. >> >>Now I will crawl under my rock and smile. >> >>Regards Roger >> >> >Cheers >RicB > >-- >Richard Brekne >RPT, N.P.T.F. >UiB, Bergen, Norway ><mailto:rbrekne@broadpark.no>mailto:rbrekne@broadpark.no >http://home.broadpark.no/~rbrekne/ricmain.html ><http://www.hf.uib.no/grieg/personer/cv_RB.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/9f/05/d4/f3/attachment.htm ---------------------- multipart/alternative attachment--
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