Re: [CAD_CAM_EDM_DRO] Frame ground vs. Electrical ground.

Try and measure your D-Sub connector on your computers parallel port between
the Ground pins and the shield screw sockets.. on some computers they are
shorted anyway..

Best Regards
Kim Mortensen

2008/11/20 Polaraligned <polaraligned@...>

> Hi,
> I have just got 3 Granite VSD-E drives and have a grounding
> question. Here is a quote from their manual:
>
> >>>>>
> 7.2 Grounding
> Drive has two separate grounds for separate purposes which are named
> as GND (ground) and FG (frame ground). GND is the electrical 0V
> potential shared with power supplies and all connector pins labeled as
> "GND". Connect GND to power supply 0V terminal.
> FG is the ground for EMI shielding which is located in D-sub connector
> metal shells and D-sub connector pins labeled as "FG". FG and GND are
> electrically floating against each other but are connected by EMI
> suppression capacitor inside drive. Make sure that D-sub shells make
> electrical contact to enclosure metal and cable shields are connected
> to FG through corresponding pins or D-sub shells.
> >>>>>
>
> I plan on installing the drives in the same metal cabinet with my
> computer, BOB, power supply, etc. Just like I did on my last machine.
>
> In the past I have connected all grounds to a common point inside the
> metal cabinet. This point also was connected to the ground of my
> mains AC power.
>
> Do I really need to keep 2 separate grounds? Can I just tie FG and
> GND together?
>
> If I tie the drive FG to the metal enclosure, then what do I do
> with the mains ground for safety reasons?
>
> Thanks,
> Scott
>
>
>

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