ABS Parts (was RE: First sighting)

[Isaac sur Noos]

Hi,
I only see one Shigeru action and it was having this defect, I lightly
sanded the edges, so I can't tell, was sort of burrs, but what strikes
me most was that the levers where noisy  (I was expecting a self
lubricating ABS) treated with Teflon powder with good enough results.

The ABS parts are similar in shape and function than wooden parts
Birdseye, flange and bushings. The bushing swell with humidity change
while the flange does not change size, so the cloth may be specially
conceived to accept compression and the opposite. I am unsure it is
really the case, Kawai is not synonym of very good cloth and felts to
me, for some reason (see the Boston hammers)

The carbon jack may be very stable in time, light and accurate, I also
noticed it can be noisy , may be the rollers are artificial leather
also (most probably) as for Yamaha, and that makes too much synthetic
on synthetic contact paths ? Yamaha rollers and backchecks are very
good for one - and they are not leather so not all synthetic parts are
equal.

It can be a psychological impression, but as yet those action with
aluminum rails have something in the tone I don't like the most, this
plus Abs , I feel when playing like if I have something unlived
between the strings and my fingers (and I really hear the plastic
"thump" of the damper levers as something not in its place in a
piano).

Probably just me , but it happens others as well !

Greetings.

Isaac


This apart one can make pleasing music with these pianos anyway, all
depends of the player !



> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Phillip Ford
> Envoye : vendredi 13 fevrier 2004 18:01
> A : pianotech@ptg.org
> Objet : ABS Parts (was RE: First sighting)
>
>
>
> >slight correction carbon graphite for the jack, a very
> good design I'd say
> >and the only part that have some benefit of the modern
> material, but ABS
> >for the flange and the whippen body, and a noisy lever
> (screech) for an
> >expected self lubricating material (Shigeru Kawai)
>
> I haven't seen one of these pianos.  Are the pins directly
> in the ABS or is
> there some sort of bushing?
>
> >  , plus defects due to the molding process leaving sharp
> edges at the
> > roller window (can be easily fine sanded, but it is not
> ok for a piano of
> > this price)
>
> >  ...
> >
> >Isaac OLEG.
> >
>
> Sharp edges on the sides of the window that would be in
> contact with the
> knuckle?  Is it causing knuckle wear problems?
>
> Phil Ford
>
>
>
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