Tuning Square Grands/Tuning Hammer - In theory

[phil frankenberg]

True, there's not excessive torque on the average square, but my input here
has more to do with length of lever and accuracy in general than in tuning
squares. Matt presented a theory that would apply to any piano and I would
guess that scientifically he's correct. Though I am not absolutely certain
why, I know that I have more control (accuracy) with a shorter rather than
longer lever.
----- Original Message -----
From: "Farrell" <mfarrel2@tampabay.rr.com>
To: <pianotech@ptg.org>
Sent: Monday, July 01, 2002 7:15 PM
Subject: Re: Tuning Square Grands/Tuning Hammer - In theory


> Yeah, but how much torque is required to turn the average square grand
tuning pin? Not much torque = not much flex = good accuracy!      :-)
>
> Terry Farrell
>
> ----- Original Message -----
> From: "phil frankenberg" <rinkyd@pacbell.net>
> To: <pianotech@ptg.org>
> Sent: Monday, July 01, 2002 4:26 PM
> Subject: Re: Tuning Square Grands/Tuning Hammer - In theory
>
>
> > Matt
> > Your argument appears sound, but I have to agree with Joe's assessment.
The
> > longer the lever , the more flex. More flex, less accuracy.
> >
> > Phil Frankenberg
> > Chico, Ca.
> > ----- Original Message -----
> > From: "Matt Wynne" <ptuner@optonline.net>
> > To: <pianotech@ptg.org>
> > Sent: Monday, July 01, 2002 3:13 PM
> > Subject: Re: Tuning Square Grands/Tuning Hammer - In theory
> >
> >
> > > At 11:23 AM 7/1/02 -0700, Joe wrote:
> > > >. The longer the lever the greater the mechanical
> > > >leverage AND the lesser is the accuracy!
> > >
> > > Hmm...Joe, wouldn't be the other way around?  Wouldn't it be greater
> > accuracy?
> > >
> > > Let's view a tuning lever as the radius of a circle, and your hand is
at a
> > > point on the circumference of the circle.
> > >
> > > On a normal tuning lever where the radius is 12 inches or so, you may
have
> > > to move your hand, say, 1/4 inch along the circumference of that
circle to
> > > raise a note, say, 2 cents.
> > >
> > > When you switch to a longer tuning lever, the circumference is
enlarged.
> > >
> > > To raise the same note the same 2 cents will require more distance,
let's
> > > say for the sake of argument: 1/2 inch.
> > >
> > > Therefore, if  the original 1/4 inch of motion will now raise the note
1
> > > cent instead of 2, wouldn't you consider that a gain in accuracy?
> > >
> > > Food for thought.
> > > -Matt
> > >
> >
>