Re: step dir inputs on Gecko Bridgeport saga

Got the x axis to move over 120ipm with a standalone pulse generator
triggering the Gecko drive. Nothing wrong with the Geckos or the
motors inspite of the motor being Nema 42 with a 3100 oz/in rating.

The headphone test reveals a smooth tone emanating from the stepper
motion board. So, I am still in the dark as to why I am limited to
20 ipm. Seems to be a problem from the motion board back to the
computer. Unfortunately, I have no control over the step pulse
characteristics other than rate. I will find an oscilloscope and
give that a whirl.

Thanks for the help
Keith Clark

--- In CAD_CAM_EDM_DRO@yahoogroups.com, JanRwl@A... wrote:
> In a message dated 9/6/2004 8:07:29 PM Central Standard Time,
> mail@t... writes:
> Any suggestions?
> Yes. The "logic level" must go "hard" to ground. Just opening
the +5 VDC
> source doesn't do it, as the "internal stuff" in the IC where the
gate involved
> connects will often "pull up" the input line (though not ideally).
>
> Suggest you connect the +5 to this DIR input via a 1K resistor,
and then that
> same point to GND via the switch. The switch, then, will make
this a "hard
> LOW" when closed, and a "pulled-up +ve" when open.
>
>
> [Non-text portions of this message have been removed]