TR: Regulate by feel (was : Bechstein grand spread dimension)

[Isaac OLEG]

-----Message d'origine-----
De : Isaac OLEG [mailto:oleg-i@wanadoo.fr]
Envoyé : vendredi 20 septembre 2002 01:53
À : Keith Roberts
Objet : RE: Regulate by feel (was : Bechstein grand spread dimension)



Hello,

I am feeling that I will not allow more than 46.5 mm on this action,
with the actual setup, little rollers = high inertia at the beginning
of the stroke, that would be too heavy to play.

Changing the spread will modify a very little the global ratio, but
will change the acceleration and the relation of the levers between
them. The roller is often worn flat too fast if the jack is not well
in place, beside, maximum energy transmitted directly when well
aligned.

Actually I feel the movement is too much at the end of the key stroke,
and I believe that if I add a little spread, assuming it does not
create other problems, I will gain speed for the hammer since the
start of its move, as the inertia will be broken more easely. That
makes a whole word of changes in the sound, that will be more civil.

Then I expect that at the end of the key strokes, the levers will have
a slower movement, because capstan farther, nearer of the extremity of
the whippen)

Then the same move in the key will be less move for the jack.

Hope that makes sense and that is what I have noticed when playing
with the spread.

Regards and good post (no, no, don't thank me ;>)

Isaac.





> Isaac, Jon, Ed,
> Excellent posts on regulating. So what's going to solve the too much
> aftertouch? Seems that the angle of the jack should be the prime
> consideration in changing the spread. Assuming the jack is
> only moving as
> far as needed so amount of after touch is minimal, that
> leaves moving the
> capstan or increasing blow distance. What is the key ratio?
> Blow distance of
> 49mm isn't unheard of is it? For 9.5mm of dip it is, I
> think, but I'm just
> learning.
> Keith R
> ----- Original Message -----
> From: "Isaac OLEG" <oleg-i@wanadoo.fr>
> To: "Pianotech" <pianotech@ptg.org>
> Sent: Wednesday, September 18, 2002 3:17 PM
> Subject: RE: Regulate by feel (was : Bechstein grand spread
> dimension)
>
>
> > Hello,
> >
> > These are also visual impaired tuner's methods, there are
> many very
> > useful tricks to learn from then.  Knocking there and
> there, knowing
> > the good regulation by ear and feel.
> >
> > I don't always think about it myself, but closing eyes is
> a good way
> > to come back to what you are doing if the feeling escape
> while tuning
> > or regulating.
> >
> > Talking about the drop moment, at any price I will not delay the
> > contacts between regulating button or screws, this is
> robbing tactile
> > feedback, precision and control to the pianist. If the
> jack can brush
> > under the roller before letoff, then its position may be
> too far. I
> > always aim for one friction moment, then the hammer is the most
> > energetic.
> >
> > And then the pianist can use its weight to play because
> he can trust
> > where the note will speak, using its weight instead of
> retaining it or
> > using articulation is giving him a fuller tone naturally.
> >
> > There is a wedging effect between the roller, the top of
> the jack and
> > the lever when stopped by the screw that gives that
> catapult effect to
> > the note and that nice feeling of letoff + aftertouch.
> >
> > When properly done the note can play pppp to FF in only
> its last half
> > of the dip.
> >
> > Have nice pianos .
> >
> >
> > Regards
> >
> > Isaac OLEG
> >
> >
> >
> >
> >
> >
> > >
> > > When I regulate let-off in a grand piano I see often, I
> > > regulate as much
> > > by feel as by sound.  I turn the let-off up until I can
> > > feel the hammer b
> > > a r e l y  brushing the string, then turn it back slightly
> > > and listen as
> > > I press the key again slowly but with a certain pressure,
> > > and listen to
> > > the strength of the sound of the slightly struck note.  I
> > > set the letoff
> > > based on the sound---an often-visited, performance type piano:
> > > more strength of sound (closer to the string); a piano
> > > regulated less
> > > frequently: much fainter sound.
> > > Sometimes I use a hand-held mirror afterwards to check
> the let-off
> > > visually, for evenness. If I've paid attention to my ears
> > > and touch, the
> > > job is also visually even.
> > >
> > > Thanks for your interest.  Isaac has sent you a beautiful
> > > post about
> > > regulation; I learned a lot from it; I need to pay more
> > > attention to
> > > bedding the key frame.  Thanks a lot, Isaac.
> > >
> > > David Andersen
> > > _______________________________________________
> > > pianotech list info:
https://www.moypiano.com/resources/#archives
> >
>
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>