Re: Question:Parallel interface with Gecko 201 drivers

--- In CAD_CAM_EDM_DRO@y..., "Kayla Sanders" <tattoos4unme@y...>
wrote:

> --- In CAD_CAM_EDM_DRO@y..., "Kayla Sanders" <tattoos4unme@y...>
> wrote:EDITED BY KAYLA SANDERS
> > 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
> > and the learning experience..
> > Heres what i know about cabling from parallel port.....
> > The wires must be in twisted pairs.
> The step/dir wires must not be in the same twisted pair.
> The length should be no more than 12 feet in length for optimum

signal carry.

> Any power derived from the controller source must be seperate

from

> the step/ dir wires. Prefferably as far away as possible.
> The wires must be of a shielded kind.
>
> My question is this....
> If the step/dir wires can not be put in the same twisted pair,

then how should they be wired?

>
> > Two step in a pair or two dir in a pair? Or what?
> I ask this because in a 3 axis system, one set of step/dir wires
> would have to be in a single step wire, and a single dir wire.
> Neither being in a twisted pair.
> What is the benofit of having the wires arranged in twisted pairs?
> If you were to make your own cable(even though you probably would
> opt not top do so) How would arrange the wires??
>
> Thanks again
>
>
> >
> >
> >
> >
> >
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., "Tim Goldstein" <timg@k...> wrote:
> > > Yes you can just cut off the centronics, trace down the wires

to

> > know which
> > > pin they connect to and then connect direct to the Geckos. I
> have
> > done it
> > > before. Honestly it is not worth the time and the tiny wires

in

> > the cable do
> > > not clamp onto the Gecko connectors very well. My suggestion

and

> > what I do
> > > now is just buy DB25 breakout (junction) boards from Dan Mauch

at

> > > Camtronics. They are nothing fancy. You just use a DB25 to a
> DB25
> > cable,
> > > connect the board and it gives you a nicely labeled and easy

to

> > access row
> > > of screw terminals just like on the Gecko for all the pins in
> the
> > parallel
> > > port.
> > >
> > > There is no ground connection between the Gecko and the

computer

> > if you use
> > > G201 or G320 drives. If you use G210 or G340 you can configure
> the
> > drive to
> > > use a ground instead of +5. That is opposite of the
> > recommendation, but it
> > > is possible. If you ever do need to use a ground form the
> parallel
> > port they
> > > are all the same, so it does not matter which pin you use for
> > ground (as
> > > long as it is one of the ground pins).
> > >
> > > For the +5 just connect a wire to an unused drive terminal and
> > bring it down
> > > to the drives. I just wire tie it to the parallel cable. You

can

> > get fancy
> > > breakout boards that will let you "inject" it into the

parallel

> > cable and
> > > pull it out the other end, but I have gone for simple and it
> works
> > just
> > > fine. If you have a laptop that you can not get the +5
> internally
> > than you
> > > can get it from a PS2 port, game port, USB port. There is no

+5

> on
> > the
> > > parallel port.
> > >
> > > Tim
> > > [Denver, CO]
> > >
> > >
> > > ----- Original Message -----
> > > > I got an old printer bi-directional cable. do you think i
> could
> > just
> > > > cut
> > > > off the centronics end and wire the geckos from there ?would
> the
> > > > cable be
> > > > grounded internally to help with EMI?Or what?
> > > > Or would i be better off just cutting the db25 end off and
> using
> > it
> > > > to wire a
> > > > whole new set in twisted pairs with sheilded and grounded

wire

> to
> > > > the geckos? would that work??
> > > > Does it matter which ground wire goes where in conjunction
> with
> > the
> > > > step/ dir signals from the PC?
> > > > Where do I get the +5v for the Gecko's from the controller
> > source?
> > > > Does it come from the
> > > > parallel port already and can be tapped into?? Or do I need

to

> > > > obtain it from another source and how?
> > > > I was under the impression that the +5V going to the geckos

had

> > > > to come from the controller source(PC).
> > > >
> > > > Sorry for all of the questions, but I just want to be clear

on

> > what I
> > > > need to do in order to get everything hooked up correctly
> > > >
> > > >
> > > >
> > > >
> > > > Addresses:
> > > > FAQ: http://www.ktmarketing.com/faq.html
> > > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > >
> > > > OFF Topic POSTS: General Machining
> > > > If you wish to post on unlimited OT subjects goto:
> > > aol://5863:126/rec.crafts.metalworking or go thru Google.com

to

> > reach it if
> > > you have trouble.
> > > > http://www.metalworking.com/news_servers.html
> > > >
> > > > http://groups.yahoo.com/group/jobshophomeshop I consider
> this
> > as a
> > > sister site to the CCED group, as many of the same members are
> > there, for OT
> > > subjects, that are not allowed on the CCED list.
> > > >
> > > > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> > POSTING THEM.
> > > DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........