Re: motion control

[Bernard Cleyet <anngeorg@PACBELL.NET>]

Right, and I have several DC motors and cranks used to drive the Bell
Labs. "wave machines".  And some stepper control boards and motors --
now to marry the two.   I think I'll find the strobe first, quicker.

bc, who belatedly acknowledges JR.

p.s. Kinsler et al. (fundamentals of Acoustics) devote a chapter (ch.
2,  >25pp) on the vibrating string.  I'm searching for the quantitative
effect of damping on the normal modes' amplitude.

John Denker wrote:

> Quoting Bernard Cleyet <anngeorg@PACBELL.NET>:
>
>
> > ... after taking an inordinate time to determine the internal
> > resistance of the P/S and the impedance ** of the driver
>
> BC is 100% correct to worry about the funky amplitude response
> of this sort of driver.
>
> But I'm not sure that doing a good job of characterizing the
> driver is the optimal solution to the overall problem.  So
> let's take a step back and inventory our options.
>
> a) Voice-coil ("speaker") driver:  excellent control of frequency,
> but questionable flatness of the amplitude-versus-frequency curve.
cut