Resolution, work, power and energy

[JOddino]

But....Did the servo get to the desired position faster?  Did it take more
or less power to do the same work?  Did it use more or less energy from the
battery?
Just stirring the pot, Jim
----- Original Message ----- 
From: "Tom Simes" <nsrca at shinymetalass.com>
To: <discussion at nsrca.org>
Sent: Wednesday, October 06, 2004 5:10 PM
Subject: Re: Resolution


> On Wed, 6 Oct 2004 15:08:03 -0500
> "Wayne Galligan" <wgalligan at goodsonacura.com> wrote:
>
> > A good question at this point would be.
> >
> > How much does the percentage of throw or ATV have an effect on total
> > power output of the servo?
> >
> > Like IF I use 75% ATV to achieve the throw I need.  How much effect
> > does that have on the total power output of my servo?
> >
> > Wayne G.
>
> Correct me - gently ;-) if I'm wrong, but I believe this simplifies to a
> lever problem and using 75% ATV increases the force required of the
> servo by 33%.
>
> Work = Force x Distance
>
> Moving a control surface through a distance requires a certain amount of
> work.  The control surface could care less whether that amount of
> work is the product of a large force and a small distance or a small
> force and a large distance.  However, obviously your servo and battery
> pack care and would prefer to exert a smaller force over a larger
> distance.
>
> Back to the equation, if we presume linkage losses to be a (hopefully
> small) constant, then the work done on the surface equals the work done
> by the servo.  If work is constant and distance is multiplied by 0.75
> (75% ATV), then force must be multiplied by 1/.75 (133%) to preserve the
> equality of the equation.
>
> -- 
> Tom
>
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