Re: Axis enable problem

--- In CAD_CAM_EDM_DRO@yahoogroups.com, John Johnson <johnatl@m...> wrote:

> Jimmy,
>
> You could use a "one-shot" also known as a "mono-stable multivibrator".
> All that gibberish just means that when the circuit gets a pulse on the
> input, it sends a pulse out of some (longer) length. Any more pulses
> that
> arrive just keep reseting it. So what you do is, connect the step pulses
> from the axes into the one-shot. As long as you're stepping, the motors
> stay on. When you stop stepping for some period, the enable goes off.
>
> Like this:
>
> __ _ _ _ _ _
> x step___ __ _ _ _ _ ________________
>
> _______________________
> enable___ __________
>
> You can use a few discrete components (resistors, etc.) and a NE555
> timer chip to do this.
> I can cook up a schematic if you'd like.
>
> Regards,
> JJ
>

Thank you very much John, for the quick response to my post. That is
exactly what i had in mind. I'm sure would appreciate it, if you
wouldn't minde to draw up a schematic.
Thanks again:
Jimmy