On Sunday, October 09, 2011 10:00:58 PM Steve Blackmore did opine:
> On Sun, 9 Oct 2011 12:16:40 -0700 (PDT), you wrote:
> >--- On Sun, 10/9/11, gene heskett <ghesk...@wdtv.com> wrote:
> >>Now, this is a small clue. And I would read that as meaning that
> >>somewhere, it appears the ground connection from the D/A might be
> >>sharing a path with some motor current. A ground loop maybe that
> >>defeats the intention of the star topology?
> >>"star point"
> >
> >What is the "star point"?
>
> In this context, a single point somewhere where all grounds are wired
> to.
>
> Imagine three or four drives next to each other in an enclosure. The
> temptation is to connect a wire from ground to drive 1, then a wire from
> the ground terminal on drive 1 to drive 2 then drive 3 then drive 4 and
> leave it like that.
>
> The correct way, with "star wiring" is a wire from ground to drive 1, a
> separate wire from ground to drive 2 etc.
>
> All the ground wires connect to a physical common point. The wires
> radiate out like the points on a star :)
>
> Steve Blackmore
I think you said it better than I, Steve. ;-)
Cheers, Gene
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