Re: Can my CNC controller blow my motherboard?

Yes, indeed, pins 18-25 show a connection to the common ground on the
controller box which is shared with 120v AC as well as the power
supply gounds.

Is this the problem?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Markwayne <markwayne@m...>
wrote:

> Check your grounds. If the power supply of the drives is grounding
> through the parallel port ground pins, bad mojo will happen to the

PC

> motherboard.
>
> Mark
>
> mrgamber wrote:
> > I have a problem and am looking for advice. I have two

motherboards

> > fail on my CNC setup and am starting to suspect the controller.

The

> > first MB just died. Would not boot. I have no idea why or when

this

> > happened as I came in one day and it would not turn on. Got it
> > replaced under warranty. Replacement MB lasted about an hour and

the

> > keyboard quit working. Now when it boots, it sounds like a stuck

key

> > error (clicking) and computer says no keyboard present. I have

tried

> > 3 different keyboards both USB and PS2, but none works.
> >
> > Can there be something come back through the controller to cause

this?

> >
> > Here is my setup;
> >
> > ASUS TUSL2 Motherboard.
> > Running Mach1 software.
> > Super-tech Servo controller (Gecko 320's) Model #EMC-XYZGS-BX
> >
> > I have talked to the controller MFG and they claim there is no
> > possible way that it could blow the MB.
> >
> > Can I buy something to protect the parallel port in case there is
> > something that can come back to kill it? Is there an optically
> > isolated parallel port card or something that could protect me?
> >
> >
> >
> > Addresses:
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