No Power Yamaha revisited

[Roger Jolly]

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Hi Isaac,
                   Concert prep is done for each individual pianist, the=20
piano is always put back to a more normal regulation after the gig.
But those Yamaha frames, seem to like some tension in them.  Steinway's=20
with Kluge key beds. much the same thing.
I prefer hardwood frames, and I am well aware of both arguments.  Just less=
=20
action saturation with the hardwood frames. IMHO.

I guess the most important thing to come from this thread, is that for a=20
performance piano, key bedding should be checked and double checked..
Regards roger

At 06:03 AM 5/24/2003 +0200, you wrote:
>Yes Roger,
>
>On the other hand, that kind of treatment is in the end abuse to the=20
>instrument, Japanese use to say that it is unfortunate, but concert prep=20
>is in the meantime destroying the instrument.
>
>Warping up the stack more and more on Steinways finally warp the wood more=
=20
>or less definitively I guess.
>
>On soft wood less problems, but still the action  may suffer if overdriven=
=20
>mode is considered (shanks on cushion, etc) as its normal regulation.
>
>I guess you put things more "civil" after hours, if you want to keep your=
=20
>instrument longer is not it ?
>
>Best Regards
>
>Isaac OLEG
>
>Entretien et r=E9paration de pianos.
>
>PianoTech
>17 rue de Choisy
>94400 VITRY sur SEINE
>FRANCE
>tel : 033 01 47 18 06 98
>fax : 033 01 47 18 06 90
>cell: 06 60 42 58 77
>-----Message d'origine-----
>De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la=20
>part de Roger Jolly
>Envoy=E9 : samedi 24 mai 2003 00:33
>=C0 : Pianotech
>Objet : Re: No Power Yamaha revisited
>
>
>You got it TOYOTA!   <G>   Do it this way even when you don't think there=
=20
>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=20
> blocks in and tight, and just tension the rail a little,  then restore=20
> after touch by lowering the hammer line. Neat trick for a big concerto,=20
> 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=20
>>roughly then, adjust the glide bolts so that they all are in contact with=
=20
>>the bed, AND all lift the balance rail to the point that the Front Rail=20
>>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=20
>>
>>

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