bouncing Schimmel hammers

[Richard and Julie Capp]

Hi Tom and Wim,
Thanks for your reponses.  Tom, the piano is c. 12 years old, is a teacher's
piano that has had a lot of use from advanced students.  I regulated the
action (blow, let-off, rep sprgs, key level/hgt, backchecks, etc.),  filed
and voiced about 9 months ago. No parts have been replaced, just
reconditioned.   Backchecks are in good shape.  I did not give any attention
to the balance hole, so I need to look at that.

This is not a backcheck issue, because the bouncing happens on a sharp,
staccato blow that does not put the hammer in check.  Wim, it sounds like
you are describing the problem that occurs with a soft/med-soft blow.
(Aloha!  I am happy for your new venture.  Will you be skiing in Colorado
this winter?)

Richard

On 10/7/07, Willem Blees <wimblees at aol.com> wrote:
>
> Richard
>
> This is similar to a bobbling problem I had with a D at school. A
> combination of roughing the tail, making sure the rake and the angle is
> right on the back check, and reducing the rep spring to where it just barely
> holds the balancier up to allow the jack to return, will take care of most
> the bobbling. It was suggested that the wippen flange and the balancier
> pinning might be the culprits, but after reducing and then increasing the
> pin size, I don't think it made any difference. Then I read somewhere that
> some bobbling is allowed, and not to worry about it, at least on a D, as
> long as the hammer isn't bouncing up and hitting the strings.
>
>  Willem (Wim) Blees, RPT
> Piano Tuner/Technician
> Honolulu, HI
> Author of
> The Business of Piano Tuning
> available from Potter Press
> www.pianotuning.com
>
>
> -----Original Message-----
> From: Richard and Julie Capp <capprj at gmail.com>
> To: pianotech at ptg.org
> Sent: Sat, 6 Oct 2007 7:36 pm
> Subject: bouncing Schimmel hammers
>
> Hello list,
> I have a problem with bouncing hammers on a Schimmel CC208T.  This is not
> the bubbling/bobbling hammers that can happen with a soft blow, but a
> rebound from the rest felt that restrikes the string on a sharp staccato
> blow.  The hammer flange pinning is a bit loose at 3-4 grams (7-8 swings),
> but I don't think that is the whole problem.  Anyone encounter a similar
> Schimmel problem?
>
> Richard Capp
>  ------------------------------
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>
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