Steinway casters orientation

[Isaac sur Noos]

Hello, you wrote :

 Also, on a number of instruments, the keyframe has a tendency to
> "float".  Stated differently, they are exceptionally
> sensitive to humidity  changes.  If/as I notice this kind of
behavior, I tend to
> set the bedding a  bit more tightly than I otherwise might.

Horace ,

I suggest that you check the bedding with the casters oriented towards
the key.
I also have numerous pianos where the bedding is changing from a day
to the other. Particularly one Steinway B which is in a basement ,
very dry place in winter and too much air flow to be corrected in the
room.
Yesterday for the first time after 5 years I was able to obtain the
"perfect" bedding, that gave the piano the most even and warm tone
ever attained.
I've also made tests on the length and strength of tone and indeed
these casters orientation question seem to play a noticeable role.

The Steinway have little casters (not double wheels) , I had also
excellent results from a tonal point of view on a very short Yamaha
GH1 also. Shorter pianos may be more responsive than medium ones, with
little casters, but in the end that may depend of the kind of
construction.

On  the 2 pianos, I asked the customer to hear with me the change in
tone, (thy concur and are professionals) I also experiment with the
spectrum analysis of the VT100 , more low partials with the rollers
oriented towards the inside of the piano (while the tail roller is not
very convenient to install that way always.

Can you experiment also a tad yourself ?


Best and thanks for your point.

Isaac OLEG


>
>
>
> Along the same lines, many more modern instruments do not
> seem to want to
> get properly bedded unless this is done with the keys and stack in
> place.  I do not think that many people still try to use the
> newspaper-under-the-balance rail approach anymore.  It
> really is rather
> useless when the keyframe are so flexible.
>
> Hope this is of some value.
>
> Best.
>
> Horace
>
>
>
> >But then, one may consider that the fixture of the legs is not as
> >rigid, and can be moving the keybed slightly ? it may depend of the
> >piano, but then the same idea apply .
> >
> >I have seen a sketch showing the roller oriented toward the tail of
> >the piano after a S&S training in a workshop, but no one cared to
> >answer me on that point (as I was not invited to the training, see
> >;>( !
> >
> >Are American grand's usually sold without rollers ?
> >
> >Best Regards.
> >
> >Isaac
> >
> > > -----Message d'origine-----
> > > De : caut-bounces@ptg.org
> [mailto:caut-bounces@ptg.org]De la part de
> > > John Minor
> > > Envoye : jeudi 8 janvier 2004 22:57
> > > A : College and University Technicians
> > > Objet : Steinway casters orientation
> > >
> > >
> > >
> > > I was told that the large european casters should be set
> > > perpendicular to
> > > the keyboard to prevent splaying of the 2 front legs which
> > > could make the
> > > keybed drop slightly in the middle and cause slight
> > > regulation problems
> > > there. Sounds plausible to me.
> > >
> > > John Minor
> > > University of Illinois
> > >
> > >
> > >
> > >
> > > _______________________________________________
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> > >
> >
> >_______________________________________________
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>
>