RE: [CAD_CAM_EDM_DRO] Parallel Port to Power Supply Grounding Differential

> If you have the Gecko drives that can only work with a
> negative common
> terminal,
> then that common should be connected to the parallel port's
> ground. You
> will
> likely need pull-up resistors from the step and direction
> signals to a
> +5 V derived
> from the computer as above.

The G201 & G320 drives are +5V common only. The G210 & G340 can be
configured with jumpers to either +5V common or negative (ground)
common. I have used them with ground common on a number of systems and
never needed a pull up resistor.

Tim
[Denver, CO]
Sherline & Taig products at Deep Discount
Mach1 & DeskCNC with credit card ordering
www.KTMarketing.com/Sherline
e-mail me at Timg @ KTMarketing.com for items not yet listed