Re: [CAD_CAM_EDM_DRO] Ways to convert step/direction signals to +/-10V analog

cnc002@... wrote:

> Hello group:
>
> I am looking for a relatively inexpensive way to convert
> step/direction
> signals from a PC parallel port to the +/- 10Vdc analog needed to
> control a
> servor motor amplifier.

This is insane! Why would you want to lose 95% of the information
content, and
then try, somehow, to recreate it? If you want a linear velocity
command signal,
use a DAC.

> I know that Gecko drives has a servo driver that
> will do this and I have a couple ordered. The scenario I have is
> this: The
> machines already have the servo amplifiers and motors on them and the
> motors
> are much larger than the maximum allowed by the Gecko drives. There
> is a PC
> system with a G-code interpreter on it that outputs step/direction
> signals
> via the printer port, I need to use this to drive the servos.

Why do you want to deface a good linear servo system with a PC program
that
only knows steps? There ARE alternatives!

(Yes, I know, I'm a servo bigot, but I LIKE smooth motion.)

Jon