HAMMER HANGING JIG, from spurlock

[PIANISSIMO PIANOFORTE S.L.]

Hi Stéphane,

Good points you've mentioned for head hanging...

r u from belgium?

Patrick


> Hello all hammers hangers.
>
> I've used the Spurlock jig, but I found that especially in the top trebble
> hammers, if the shoulders are on a perfect straight line, the strike
> points
> are not and vice versa.  The Spurlock jig assumes that the piece of felt
> where the hammers come from is perfectly tapered to begin with, and stays
> so
> after pressing, which I found was not always the case in the sets I hung.
> Also, the straight line in all 88 hammers assumes that the
> plate/agraffees/capo arrangement is precise enough to place the resulting
> correct strike points in that straight line (sorry for my approximate
> english), which I also found not always to be true, especially between the
> agraffee section and the capo section.  The best striking point is easy to
> determine by hearing the sound of the note, and when you place the last
> hammer in agraffee section and the first of the capo section by ear, you
> could sometimes notice that they don't line up with the rest.  Same at
> other
> sections borderline, at each side of a strut.  Of course, hanging the
> hammers in different sections at even slightly different distance from
> center pin induces geometry discrepancies, but, if not extreme, I found
> those easier to deal with than voicing out the transitions between
> sections.
> So I like setting the first and last hammer in each section at the correct
> angle, copied from old hammers, and at the place they sound best, then
> line
> up the hammer moldings in that section with a straight edge put under the
> shanks, and eyeball the strike points to be in straight line in that
> section, using a glue that doesn't set too quickly so I still can make
> slight adjustments when looking at the whole section.
> What do you think ?
>
> Best regards.
>
> Stéphane Collin.
>
>
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Patrick Hinves Ballesta
Afinador/Técnico 610442371
PIANISSIMO PIANOFORTE S.L.