Re: Parallel Port to Power Supply Grounding Differential

Hi Bill,
Personally I just bit the bullet and purchased a breakout
board with optical isolators. Here is the URL
www.campbelldesigns.com Look for the Breakout boards. $125
insurance policy. Cheaper than my computer!
I know that Bob is off on holidays but that his product is used by
many on this list and others. That was my choice. Also it nested
with the Mach1 that I purchased to control my machine from Art.
http://www.artofcnc.ca/

Good Luck we are here for you!
Michael :-)
Ripon CA.

> Just wondering how other folks are ensuring they don't blow out

their parallel ports via voltage differentials between the parallel
port's #18-25 ground pins and the chassis ground at the power supply
case? I am using Gecko 320's and a spare PC case housing a
transformer fed linear 75V power supply (minus grounded to case) and
What are my options?

> Thanks
>
> R. William Kichman, P.E.
> Kichman Engineering Associates
> 103 Old Furnace Road
> Cornwall, PA 17016-0643
> tel/fax 717/270-0714