Aha! was flat facts

[William R. Monroe]

Dean,

True, static friction is greater than dynamic friction.  However, as long
we're splitting hairs here, define jump.  What I mean is, it is easy to
imply that if the pin overcame the static friction it would then make some
large movement, resulting in a large pitch change.  I think arguing that it
jumps vs. makes micro movements becomes an issue of semantics.  Your jump
can be my micro movement.  What's more, this assumes that friction is
constant, whatever the pins position in the hole.  I'm unsure if this would
be the case or not.

Respectfully,
William R. Monroe

----- Original Message ----- 
From: "Dean May" <deanmay@pianorebuilders.com>
To: "'Pianotech'" <pianotech@ptg.org>
Sent: Monday, March 28, 2005 8:00 AM
Subject: RE: Aha! was flat facts


> Static friction is greater than dynamic friction. If a tuning pin moves
> it jumps, it does not turn in micro movements over time.
>
> Dean
> Dean May             cell 812.239.3359
> PianoRebuilders.com   812.235.5272
> Terre Haute IN  47802
>
>
> > -----Original Message-----
> > From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
> > Behalf
> > Of Ron Nossaman
> > Sent: Sunday, March 27, 2005 11:38 AM
> > To: Pianotech
> > Subject: Re: was flat facts
> >
> >
> >
> >> I don't really buy into the "tuning pin turns" theory.
> >
> > Me either, nor the wire stretching. Music wire doesn't continue to
> > stretch over time unless it's tensioned at it's yield point - then
> > it stretches, necks down, and breaks.
> > Ron N
> >
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