Adjusting Action Centers

[Isaac OLEG SIMANOT]

I agree the method gives immediate results and long term damage (verified).
But it is not about center pin, it is about old worn bushing it is
addressed.

Bushings are a bit more longer and difficult to replace (especially when
there is only a few).

Isaac OLEG

> -----Message d'origine-----
> De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part
> de Richard Brekne
> Envoyé : mardi 18 septembre 2001 10:48
> À : pianotech@ptg.org
> Objet : Re: Adjusting Action Centers
>
>
> While understanding the desire to find a easier and better way of doing
> things... I have to ask why not just change the centerpin ? I
> cant see that any
> real time is saved by any of these alternative methods, and
> further some of
> them really have the potential to make matters worse by
> inadvertantly or even
> on purpose damaging the surrounding wood.
>
> It really is pretty quick to simply change a center pin, and that
> gives the
> opportunity to fix / kontroll other aspects of center pin
> maintaince concerns.'
>
> JMV
>
> Richard Moody wrote:
>
> > There is a method of tightening action centers but use at your own risk.
> > They might come out too tight, or peers might cry "unprofessional".  In
> > that case consider it experimental.
> >
> > 1.   With a voicing needle poke two to 4 times in the bushing around the
> > pin.  This is to compress the felt around the pin.
> >
> > OR
> >
> > 2.  With the smallest hole punch, (like what is used in player
> piano work)
> > "Tamp" the bushing.  Press the punch into the bushing so to press it
> > inwards.
> >
> > 3 Since it is better to have a dull punch,  the "Moody Bushing
> Tamper" can
> > easily be made.   Pull the pin out of a center pin punch.
> Enlarge the hole
> > in a drill press to near the size of a #24 center pin.    Bevel
> the edges
> > on a grinder enough to clear the wood.
> >
> >
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> Bergen, Norway
> mailto:Richard.Brekne@grieg.uib.no
>
>
>