RE: [CAD_CAM_EDM_DRO] PWM signal to step/direction signals

Well, what ever it really is, in the RC world they make a BIG deal about the
more expensive radios using PWM or PCM among other abuses or miss uses of
other terms. I think it is more a marketing thing to justify the high
prices of a good RC transmitter and receiver. I got out of the RC hobby
about 3 years ago, I just could not justify the investment in scale planes
any more. It's sort of like racing cars, one mistake can turn 10 grand into
worthless scrap in a second or two.

John Guenther
'Ye Olde Pen Maker'
Sterling, Virginia

> -----Original Message-----
> From: JJ [mailto:jj5412@...]
> Sent: Thursday, October 10, 2002 8:37 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] PWM signal to step/direction signals
>
>
> > I hear what you are saying, and I think I've abused the term
> > "Pulse Width
> > Modulation" in my previous response.
> >
> ...
> > This sort of "PWM-ish" control is better named PWPS for Pulse Width
> > Position Servo (control).
>
> It's actually FM, frequency modulation. It varies from 2.0ms (500 Hz) to
> 0.5ms (2000 Hz).
>
> If it were PWM, the frequency would be fixed, and the duty cycle would
> change.
>
> Regards,
> JJ
>
>
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