switching motors (was Re: motor grounding and DB9 connector question

Since this thread mentioned switching from a mill to a lathe and
back, why could one not just wire up both and then use a few relays
to determine which machine was being controlled ?


I too looked at using connectors and decided on a terminal strip in
my control panel, the rubber gromet panel bulkhead connectors and a
quick connet at the stepper.

Molex come in 0.062" up to 6 amps, and 0.093 up to 10 amps.

The round connectors come in various sizes too, from 0.04" (7.5
amps) , 0.062" (13 amps) up to 0.125 inches(45 amps)

Dave

--- In CAD_CAM_EDM_DRO@y..., Jerry Biehler <j.biehler@v...> wrote:
>
> On Wednesday, March 27, 2002, at 09:24 PM, resosys wrote:
>
> >> I believe each pin is good for 2 amps, and as a (standard 2 phase
> >> bipolar) stepper needs 4 power lines, I think you might be
> > restricted
> >> to 4 amps (ie four paired wires, and maybe a ground).
> >
> > Great info, thanks. The DB9's are not going to cut it.
> >
> >> Someone here was using a DB25 (perhaps it was Al Schoepp)
> >> and he uses four bundles of four wires, leaving 9 wires
> >> for other functions (limit switches etc).
> >
> > Seems like a bit too much to split the wires out to that many
pins.
> >
> >> These days I am just dispensing with the connectors, running
> >> the wires into the box through a rubberized plastic weatherproof
> >> cable strain-relief socket, available at any electrical dealer.
> >> It comes with a selection of rubber inserts to match your wire
> >> bundle diameter, and hold them snug.
> >
> > I'd like to have connectors at the control box so that I can move
the
> > box to other machines. I will have a converted mill before year's
> > end and plan to swap the control box from the router to the mill,
as
> > necessary.
> >
> > I'm hoping someone on the list has purchased some hearty
connectors
> > and had good luck with them. I'm not afraid to pay a little extra
> > for a great connector, I just need to find them. Any supplier
> > suggestions would be greatly appreciated.
> >
> > Thank you for the reply. This list has been incredibly helpful.
> >
> > Chris
>
> A nice connector I have found it the AMP/TYCO Circular Plastic
> Connectors. Very reasonably prices (Digikey carries them.) Kind of
like
> the Amphenol metal connectors but a whole lot cheaper. I used some
to
> hook up a remote for a truck mounted crane. Worked great.
>
> -Jerry
>
> >
> >
> > 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 memembers are
there,
> > for OT subjects, that are not allowed on the CCED list.
> >
> >
> >
> > Post messages: CAD_CAM_EDM_DRO@y...
> > Subscribe: CAD_CAM_EDM_DRO-subscribe@y...
> > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@y...
> > List owner: CAD_CAM_EDM_DRO-owner@y..., wanliker@a...
> > Moderator: jmelson@a... timg@k... [Moderator]
> > URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > bill,
> > List Mom
> > List Owner
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >