Re: [CAD_CAM_EDM_DRO] Re: Question:Parallel interface with Gecko 201 drivers

The whole idea of a 'twisted-pair' is shielding. One
'partner' (usually a black, or striped color) of the
twisted pair is always tied to ground. Some insist on
having both ends of that 'ground' wire to be 'grounded',
but I was always taught to only ground one end, to avoid a
'ground-loop' situation. The twisting, sort of, wraps a
'shield' around the wire to protect it from stray magnetic
fields that pervade the local environment, where switching
several amperes in microseconds commonly occcurs. (It may
also protect other wires from being affected by the
'pulsing' currents in the wire-pair in question.) That
effect is one of the things that generate the magnetic
'noise' that you want your (relatively) weak signal lines
from, and why you'd want to separate the signal lines from
the power lines. Now, I s'pose you're really
dazedNconfused by all of this. :-)

RayHex

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> From: Kayla Sanders <tattoos4unme@...>

>
> While using a breakout board is probably the best way to

go, i find

> myself wanting to make my own cable for the pure

satisfaction of it
SNIP

>
> My question is this....
> If the step/dir wires can not be put in the same twisted

pair, then

> what should a twisted pair consist of?
> Two step in a pair or two dir in a pair? Or what?
> If you were to make your own cable(eveen though you

probably would

> opt not top do so) How would arrange the wires??