Scruffing -was - Over-Strike vs Under-Strike

[Bob Hull]

I agree: "Scuffing" is a more accurate word than
"scruff" to describe a sliding blow that isn't able to
rebound directly in the same plane of motion in which
it approached its target.  Like scuffing your shoes;
Scraping, abrading, grazing. 

Wouldn't this type of blow also casue the hammer to
stay on the string longer and affect various partial
strengths?  Of course, not only overstriking results
in scuffing but other things such as loose pinning,
action rails that are not perpendicular, poorly
anchored hammer flanges, warped hammer shanks, and the
list goes on.  

All of these add to inefficiency and lack of control.
Faster wear of hammers, and perhaps wear of bushings
could result from this type of hammer boring.  

Boring that creates overstriking so the hammer shank
can whip backwards does not take into account soft
blows that have less whipping or bending of the shank.

I have changed overstriking hammers in action rebuilds
to 90 degrees, both in uprights and grands, (adjusting
for strike points) with improved results.

Bob Hull

 John Delacour <JD at Pianomaker.co.uk> wrote:

> At 6:30 pm -0500 25/11/06, Sid Blum wrote:
> 
> >I've enjoying and learning from this discussion 
> but got curious and 
> >thought to share this:
> >
> >http://dictionary.reference.com/browse/scruff
> 
> Yes.  I can find no definition of 'scruff' that
> remotely indicates 
> the phenomenon under discussion.  Perhaps they mean
> 'scuff', but even 
> that would be far-fetched.  What happens is that the
> nose of the 
> hammer strokes the string or slides along it, as
> happens by design, 
> and to a greater extent, in the Viennese grand
> action.
> 
> JD
> 
> 



 
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