Okay guys a breakthru,....
I just managed to take a book lunch and sat down with the parts manual
for the Cincinatti arrow 500 I have. Therein it contains all of the wiring
diagrams and the harness setups. Well I looked at the table wiring harness
and sure enough there are basically four switches on the table. One is an
overtravel switch as they call it and one is labeled TPA switch. I am
gonna take that as one being a limit switch that presumably is used to hit
a cam on either end of travel and the other is a homing switch. That makes
this real simple then. I suppose I will be best off to then take the Limits
all three of them and tie them into the e-stop circuit and then use the
other switches for homing. That way I can have my cake and eat it too. The
homing is a puzzler now tho. I am sure I can wire it into my 7I77 mesa card
and get the switches recognized but the wiring of the switches is a
question mark. Not being too familiar with LinuxCNC does it have a HOME ALL
button where the actuation is followed by a slow homing of the Z axis, then
the X and then the Y etc... Does it allow for tripping the home switch and
then back off so one could maybe wire the home switches in series to the
mesa card only using one pin input? Or does it get more involved needing
all three home switches on different pins to allow the machine to home
properly? The original machine setup required you to home all three axes
and then manually home the toolchanger to position one and then it was
ready to run so I am thinking something like that would work fine. Honestly
if it is not too much trouble I may actually install a toolchanger home
position switch so it can just run home that way as well altho this machine
has a multi-directional 21 tool carousel on it. At this point the
toolchanger logic is gonna be left out of the picture until I have all
three axes working reliably and the spindle working as well. The machine
has a funky triple sensor setup on the spindle body that acts against some
kinda cam that used to be used to locate toolchange spindle alignment. I am
leaning towards using an encoder on the spindle body to locate that on the
new setup due to the LinuxCNC's use of it in rigid tapping operations. From
what I gather using an encoder on a standard VFD to power the spindle has
some issues, you must be at a slower speed to reliably be able to index the
spindle apparently. I have no problem with that if there is a way to
automatically slow the spindle to a crawl to index for the toolchange. That
is another problem for another time tho right now I would like to hear more
about the estop circuit and the limits/homes. thanks guys...peace
Pete
On Wed, Feb 13, 2013 at 12:01 PM, Gene Heskett <ghesk...@wdtv.com> wrote:
> On Wednesday 13 February 2013 12:00:38 Pete Matos did opine:
>
> > you guys crack me up!! ;<) peace
> >
> > Pete
> >
>
> Glad to be of service Pete. :)
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page: <http://coyoteden.dyndns-free.com:85/gene> is up!
> My views
> <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml>
> "Send lawyers, guns and money..."
> -- Lyrics from a Warren Zevon song
> I was taught to respect my elders, but its getting
> harder and harder to find any...
>
>
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