Shift Problems

[Delwin D Fandrich]

----- Original Message -----
From: "Isaac OLEG" <oleg-i@wanadoo.fr>
To: "Pianotech" <pianotech@ptg.org>
Sent: October 25, 2002 11:50 AM
Subject: RE: Shift Problems


> Hello,
>
> It's the other direction, Del (hammers too far at the left probably)
>
> regards.
> Isaac O Zoreil
>

Hmm? I said, "If the shanks are generally aligned too far to toward the
bass...." And from where I usually sit the bass is toward the left.

I suspect that the keyframe rest block is too wide--it may not have been
properly 'adjusted' (trimmed) placing the keyframe too far toward the treble
(the right). If this is the case to get the hammers aligned to the strings
the hammershanks would have to be biased--angled--slightly toward the bass
(the left).

To correct this the hammershanks are aligned to the wippens, the keyframe
rest block is trimmed appropriately positioning the keyframe some toward the
bass (the left). There is even a 'proper' way to determine just where it
should end up. Measure the gap between the bass keyblock and the outside
edge of A-1 and the gap between the treble keyblock and the outside edge of
C-88. Add these two numbers together and subtract the amount of action
shift. Divide the answer in two and use that figure to establish the proper
gap between the bass keyblock and the outside edge of A-1. (All of this
assumes that the keyblocks are the proper width.)

Once the keyframe is in the proper place the hammers are once again spaced
accurately to the strings. (They will all be shifted a bit toward the treble
(the right). Once the keyframe is in the correct spot it's a good idea to
also check the alignment of the back action to the backs of the keys. More
often than not it will have to be moved a bit to follow the keyset.

Del
>
> > -----Message d'origine-----
> > De : pianotech-bounces@ptg.org
> > [mailto:pianotech-bounces@ptg.org]De la
> > part de Delwin D Fandrich
> > Envoyé : vendredi 25 octobre 2002 10:47
> > À : Pianotech
> > Objet : Re: Shift Problems
> >
> >
> >
> > ----- Original Message -----
> > From: "Avery Todd" <avery@ev1.net>
> > To: <pianotech@ptg.org>
> > Sent: October 24, 2002 4:36 PM
> > Subject: Shift Problems
> >
> >
> > >
> > > I don't see anything I can do to make the action shift further
> > > except reduce the thickness of the cheek block. The hammers are
> > > very well aligned to the strings, so that's not the problem.
> >
> >
> > Ah, but how are the hammershanks aligned to the wippens.
> > This would not be
> > the first time an action got out of NY with the
> > hammershanks all aligned
> > overly far to one side or the other.
> >
> > If the shanks are generally aligned too far to toward the
> > bass--check by
> > looking straight down and determining how they line up with
> > the rebound
> > felts and the wippen flanges--you might be able to reduce
> > the width of the
> > action shift stop block and re-align the hammers to the
> > strings thereby
> > establishing the correct shift.
> >
> > It's a long shot, but before you start carving and cutting
> > you might check.
> > During the 70s and 80s I probably did this to half a dozen
> > or so S&S grands.
> > Factory story? It can't happen.
> >
> > Del
> >
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
> >
>
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