Thanks!
Alan
-----Original Message-----
From: Tom Rhea, Jr. <rheapiano at cox.net>
To: pianotech <pianotech at ptg.org>
Sent: Tue, Oct 26, 2010 5:41 am
Subject: Re: [pianotech] Regulation mystery
Alan,
The seasoning of wood in Asiamay be a little different than the wood used in domestic pianos. Different woods in the Americashave different standards, especially drying standards. SPIB (Southern PineInspection Board) specifies that kiln-dried lumber be at 20% humidity (see KD20stamped on the side of the lumber) and air-cured wood will be different. The wood itself may be a little different, too, due to soil, nutrients,moisture, sunlight or even different strains of the same general woods used inpianos.
Tom
From:pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of reggaepass at aol.com
Sent: Tuesday, October 26, 201012:13 PM
To: pianotech at ptg.org
Subject: Re: [pianotech]Regulation mystery
Tom,
Improperly seasoned wood sounds like a good bet, especially if the wood
comes from the Orient.
What is different about wood coming fromthe Orient than from elsewhere?
Thanks,
AlanEder
-----OriginalMessage-----
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
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