Re: [CAD_CAM_EDM_DRO] Plenum Cable?

>
> From: "Tim Goldstein" <timg@...>
>
> > A first guess would be Category 5 Computer network cable, possibly
> > telephone network or alarm wire as well.
>
> I have never seen 6 conductor Cat 5 wire. It is normally 8 conductor. Also,
> if the individual wires are 18 ga that is sure not computer wire. The patch
> cord I am looking at is 24 AWG.

Granted, Network cable is often an even number of pairs, but I have some
telephone stuff that has Odd numbers of pairs, 25 is very common.

That was why I mentioned the other 2 options.

As to the Gauge, I have a 500' spool of what is probably 18 gauge if not
heavier. it IS a wood spool, and is labeled computer communication
and interconnection cable.

>
> > I may very well be twisted pair, er. make that probably.
>
> > How does twisted pair respond to the spikey power levels used in
> > steppers, anybody?
>
> Never tried it, but the idea of twisted pair is that is is pretty resistant
> to EMI and tends to not radiate EMI.
>

That is precisely the issue, the design features that limit both radiation
and reception of Electro Magnetic fields at the frequencies, voltages and
currents of communication signals may not be good, and may be downright bad
at 50 volts and 5 amps.

The main Issue IMHO is the designed in cross induction of signals between
pairs a guy may use for common high current sources and returns.

Marc