Re: [CAD_CAM_EDM_DRO] Re: Gecko 5V supply You gotta have ground!

These are like a big battery charger with 200 cells in series. 2000 amps on the bus.
about 240 DC volts at the generator . Drop across each cell about 1.2 V. NOT electronic circuit. There were higher amp systems.

Jesse

kleinbauer@... wrote:

> Hi,
> You are right, a DC supply has a plus and a minus. But just
> like in a car, if you hook the minus to the frame of the car! The
> frame becomes ground. Computers use a case ground system. This helps
> eliminate RF noise. Digital signals need a ground. I used to work
> with techs who did not hook there scope grounds to the circuit. Lots
> of laughs watching them troubleshoot. Every IC in a computer has one
> pin going to ground. The only exception might be an opto coupler in
> the modem.
>
> John
>
> --- In CAD_CAM_EDM_DRO@y..., jesse <jkbrennan@w...> wrote:
> > On DC power circuits neither side is grounded. So both the + or -
> buss has zero potential to ground. Years ago when I was running
> > diesels generating DC power for electrolytic hydrogen it was
> normal to feel the bolted buss connections looking for hot spots.
> > It took watching someone else doing this a few times before
> starting to do it. Just don't grab both busses at the same time.
> > I would have to do some checking before I did this on electronic
> systems.
> > Jesse
> >
> > mariss92705@y... wrote:
> >
> > > Hi,
> > >
> > > Most PCs have a game port. The +5VDC is available on pin of the
> game
> > > port. You cannot electrocute yourself off of 5 volts even if you
> put
> > > the wires in your mouth and stand in a tub of salt water. Haven't
> > > tried it myself but I am sure.
> > >
> > > Mariss
> > >
> > > --- In CAD_CAM_EDM_DRO@y..., jvicars@c... wrote:
> > > > The Gecko 201 manual says that the 5V for step and direction
> must
> > > come
> > > > from the indexer/pulse source. I.E. the computer. I don't
> really
> > > > understand how to accomplish this. Can you get 5V through the
> > > > parallel port somehow, or do you have to run a 5V line from the
> > > > computer to the drivers?
> > > > Anybody have advice on how to hook this up?
> > >
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