If it is the "seasoning" of the wood, that suggests it may not have been completely acclimated to the factory environment at the time of manufacture/assembly. Soon after it would equilibrate with it's environment. Once that happens the way the wood was "seasoned" will not affect future shrinking and swelling of the wood with changes in it's moisture content. Yeah, the Orient. Not like real wood - from America! Terry Farrell On Oct 26, 2010, at 12:12 PM, reggaepass at aol.com wrote: > Tom, > Improperly seasoned wood sounds like a good bet, especially if the > wood > comes from the Orient. > What is different about wood coming from the Orient than from > elsewhere? > > Thanks, > > Alan Eder > > > > -----Original Message----- > From: Tom Rhea, Jr. <rheapiano at cox.net> > To: pianotech <pianotech at ptg.org> > Sent: Tue, Oct 26, 2010 4:43 am > Subject: Re: [pianotech] Regulation mystery > > Improperly seasoned wood sounds like a good bet, especially if the > wood > comes from the Orient. > > If the school is willing, you might suggest that they put a DC > system on one > of the Kawais or Yamahas and compare the frequency of tuning the DC > system > with the other ones. I would imagine that the amortized cost > savings would > be significant. > > Tom > > > -----Original Message----- > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] > On Behalf > Of Gerald Groot > Sent: Tuesday, October 26, 2010 11:11 AM > To: pianotech at ptg.org > Subject: Re: [pianotech] Regulation mystery > > Unfortunately we do not... The college has them on the Steinway's > of course > but, they do not want to install them on the other 100 pianos. > Nobody there > wants to be responsible to fill or up to maintain the Chasers on the > rest of > the pianos. I guess they prefer paying me to fix and tune them more > often > instead. :) > > What gets me, is that the older Everett studios, Baldwin studios, > Hamilton > studios and many other brands do not have this problem with regulation > changing with the weather changes. Why are the Kawai's and apparently > Yamaha's doing it? Cheap wood? Not dried out properly? > > Jer > > -----Original Message----- > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] > On Behalf > Of Tom Rhea, Jr. > Sent: Tuesday, October 26, 2010 10:48 AM > To: pianotech at ptg.org > Subject: Re: [pianotech] Regulation mystery > > Gerald, > Do any of the new pianos have DC systems? It might be instructive to > be able > > to compare a DC-equipped system with the other ones. Being in > Michigan, I > would assume that you have some pretty healthy swings in temperature > and > humidity that adversely affect all of your instruments. > -- Tom Rhea, Rhea Piano Service, Norfolk VA > > -----Original Message----- > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] > On Behalf > > Of Gerald Groot > Sent: Tuesday, October 26, 2010 10:03 AM > To: pianotech at ptg.org > Subject: Re: [pianotech] Regulation mystery > > I have the same problem with the Kawai's in the college that I > sevice for > here in Grand Rapids Mi. I too, assume the keybed is moving. We > recently > purchased some new Kawai K-3's, some Boston's and some Yamaha P22's > and > U1's. Should be interesting to compare one to the other in the next > year or > > so as the weather changes to see which one has the most problems... > > -----Original Message----- > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] > On Behalf > > Of David Nereson > Sent: Tuesday, October 26, 2010 2:21 AM > To: David Lawson; pianotech at ptg.org > Subject: Re: [pianotech] Regulation mystery > > I've regulated lost motion on a Yamaha U1 in the winter one > year, only to have to re-regulate it in the summer because (I > assume) the keybed had swelled in thickness, thus lifting the > keys and holding the hammers off the rail. I don't know how > else to explain it. > --David Nereson, RPT, Denver, CO > > ----- Original Message ----- > From: "David Lawson" <dlawson at davidlawsonspianos.com.au> > To: <pianotech at ptg.org> > Sent: Sunday, October 24, 2010 2:02 AM > Subject: [pianotech] Regulation mystery > > > I regularly service about twenty pianos at a Conservatorium, > both uprights and grands. The uprights are mostly Yamaha U1 > models about 15 to twenty years old, with a couple of Kawai KS > models also. I regulate the lost motion on these instruments so > that the capstan holds the wippen so there is no lost motion, > however, it is not holding the hammer off the rest. I have just > finished the regular maintenance of these this week, and > discovered that all but one had increased the height of the > capstans to hold the hammers off the hammerest by about 1/4 inch > or 6cm. My first reaction was that someone had been at them, > turning up the capstan. However, this is not possible as I am > the only tech. who attends to these pianos. > So, my question is this: Would the sudden change from > drought,(about ten years) to very wet conditions, have brought > on this amazing change? I find it difficult to believe that this > much change could be brought about by humidity. Let's face it, > the metal pin holding the capstan is tight into the rear of the > key, which would surely not increase the height by this much > with humidity! I checked the back touch on the key-frame, and it > seems quite normal.The only piano that did not have this happen > to it, had an additional heater in that room, which may give us > a clue. > Your thoughts please. > David Lawson Wangaratta Australia > > > > _____ > > avast! Antivirus <http://www.avast.com> : Outbound message clean. > > > Virus Database (VPS): 10/26/2010 > Tested on: 10/26/2010 10:03:03 AM > avast! - copyright (c) 1988-2010 AVAST Software. > > > > > _____ > > avast! 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