Apologies for being a totally virgin new guy here to this group. (2 stupid
questions...)
1) Can you help me help myself? How can I search previous archives for
specific
questions? (I'd hate to interrupt the group to ask a dumb question that has
already been asked..)
I've tried different versions of google search
"site:news.gmane.org/gmane.linux.distributions.emc.user search keywords" but
the
results there are of limited use. Is there a better search system that I
should
be using? (Note: I've not set up a newgroup controller with my internet
service
provider.. do I need to do that here? Browser system is probably preferred, if
that is possible.)
2) I'm designing the wire harness for a 2 dimensional CNC plasma cutter. (DC
brushed motor, optical encoder, Rutex driver boards.) I'm unclear on how to
wire up the limit switches. On our drive axis, we have a limit switch at one
end, the other end the driver gears fall off the drive track. I've got two
switches, one for X axis, the other for Y axis which are normally closed to be
used as limit switches on the appropriate end of the X,Y axis. I'd like to
send
that signal into the system, but I'm not clear on where I get a +5v signal
source. Obviously I'd prefer to obtain a +5v reference directly from the
parallel port. I don't see a setup pull down that enables an output pin to
always be set high (at least using the visual parallel port setup tool)
Can I set an "Estop out" port to use as my +5V source to my limit switch, and
return the "results" to a parallel port input pin (10, 11, 12, 13 or 15?)
Obviously I'd have to add pull down/up resistor as appropriate to clean up the
signal. Anybody been here before? (hmmm. or is that inverted Estop out to
generate a +5v source when ever the machine is turned on?...)
Apologies if this question has been asked before. I've spent a couple hours
looking, and nothing pops up as far as I can see. Many thanks for your
assistance.
zip
i3detroit.org
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