Friction

[Isaac OLEG]

First let me state that there is not real UIW working on verticals,
nowadays it is probably always so low that the keys have to be leaded
to faster the repetition.

So I am unsure the UW - DW ratio give a such significant information
that on a grand.

On badly designed verticals, friction  may be very important at the
whippen/capstan contact point and a loss of even transmission of the
key stroke appears here.

The "magic line" works there too (between the whippen ) pin and the
base of the balance rail.
Very low capstan : problem.

But just one of the reason on the vertical pianos.

0.02 Euro Zoreil Isaac OLEG

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Jon Page
> Envoyé : samedi 26 octobre 2002 03:28
> À : Pianotech
> Objet : Re: Friction
>
>
> At 10:17 PM 10/25/2002 -0300, you wrote:
> >Hi!
> >Sorry about my english. I hope you can barely understand me...
> >This is an upright piano, DW 60, UW 20. That´s friction,
> isn´t it?. Do you
> >know how could I "loose" (I don´t know how to say that,
> the opposite of
> >fasten) the wippen, jack and hammer butt flanges. Thanks!!
>
> Ricardo,
> First you would need to determine if the friction is coming
> from the
> flanges or the key pins; or a combination thereof.
>
> Proper easing and lubrication may accomplish what you need
> without repinning.
> Regards,
>
> Jon Page,   piano technician
> Harwich Port, Cape Cod, Mass.
> mailto:jonpage@attbi.com
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
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