Grand Touch

[Avery]

Since it hasn't been mentioned, I'd also check the damper lift in relation
to the key. If it's too early, that can also give a "heavy" feel.

Avery

At 12:25 PM 7/11/2006, you wrote:
>Hey, Ric---check the amount of material at the bottom of the balance rail
>hole.  If it's more than 3-4 mm from the bottom of the key upwards, the
>keys are binding internally on the balance rail pins, and that's where
>your "heaviness" is coming from.  Get a balance hole reamer from Yamaha or
>Jurgen at Pianoforte Supply; one little tool can make you a superhero. If
>that's not it, check the action spread; the "magic line" compliance of
>capstan and whippen heel.
>
>Hope this helps....
>
>David Andersen
>
>
>
>
> > If your "48g (easy) downweight and 28g up" numbers are accurate and
> > representative of the action, friction does not appear to be a problem.
> > Those two numbers give a balance weight of 38 grams, not out of the
> > workable range.
> >
> > How many leads are there in the bass keys? Seems as though you may have an
> > inertia problem (too much mass in system). How did you measure action
> > ratio?
> >
> > I find these action problems always fun and challenging - as I learn a
> > great deal each time I work through one of these. Please keep us informed
> > of your evaluation.
> >
> > Terry Farrell
> >   ----- Original Message -----
> >
> >   I am now looking after a 12 year old Petrof concert grand which has been
> > aquired by a church for recital use etc.  It is a super piano tonally
> > and in great condition, but it looks as though I will have to attend to
> > the touch in the near future.  I have played it extensively myself and
> > had a top rate professional pianist try it out and the basic problem
> > appears to be that it becomes tiring to play because the touch 'appears'
> > heavy.  On measuring the touch weight weight however, it comes out at an
> > average of 48g (easy) downwight and 28g up. Present regulation is very
> > good.  It is Renner action with smallish Renner hammers which I am sure
> > are original. The action ratio is in the 5.5 range.  It has to be said
> > that I intend  taking the action apart and check out all the centering
> > and any key friction, and I expect this to make the touch more even.
> > That said,  I still appear to have a fundamental problem which I will
> > need to be addressed, and I am asking for comments and ideas on how to
> > approach this.
> >   Don't hold back!
> >
> >   ric
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