Re: [CAD_CAM_EDM_DRO] Connectors, switches etc.

Hi Bob,

Your setup with the contactor is exactly how I want to set up my system. I
looked at the specs but they do not have any wiring diagrams to download. I
am making a schematic of my system so I can have someone more competent than
I look it over first Would it be possible for you to explain or sketch the
wiring of the contactor?

Thanks,

Jay

----- Original Message -----
From: "Bob Campbell" <bob@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, May 09, 2002 4:32 PM
Subject: RE: [CAD_CAM_EDM_DRO] Connectors, switches etc.


> Jay,
>
> On the machine that I built for Wylie High School, I put proximity sensors
> at both ends of the X and Y axis. They are wired in parallel. One end is
the
> home end. CNCPRO allows you to do this as it knows which direction it was
> going in and which limit it hit.
>
> Master 5 may do the same in the future.
>
> The break-out board that I sell has connectors and power for both sensors.
>
> Bob Campbell
> www.campbelldesigns.com
>
>
> -----Original Message-----
> From: J.Critchfield [mailto:js3mc@...]
> Sent: Thursday, May 09, 2002 11:06 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Connectors, switches etc.
>
>
> Bob,
>
> Are you using the proximity sensors for limit and home switches i.e. one
> sensor for the home and limit for each axis?
>
> Jay
>
>
>
> ----- Original Message -----
> From: "Bob Campbell" <bob@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, May 08, 2002 10:25 AM
> Subject: RE: [CAD_CAM_EDM_DRO] Connectors, switches etc.
>
>
> > Jay,
> >
> > If you look at www.automationdirect.com they have drawings and
information
> > on their proximity sensors. A proximity sensor is basically an
> electronics
> > switch that switches whenever a metal object come in close contact with
> the
> > end of the sensor. The DC voltage for the sensor is in the range of 10
to
> 30
> > volts DC. The switched output signal will then need to be converted back
> to
> > a 0 or 5 volt which is sent back to the PC. The break-out board that I
> sell
> > has an optical isolator built in to convert the signal back to 5 volts.
> >
> > A contactor is just a large relay that has contacts large enough to
handle
> > higher currents. The contactor is set up as a latching relay. By that I
> mean
> > that one of the contacts is used to maintain a current path for the coil
> in
> > the contactor once it is energized. The wiring through the on/off switch
> and
> > the EPO switch keeps power to the contactor. If the EPO switch is pushed
> in
> > or the on/off switch is turned off, the contactor will lose power and
> switch
> > the contacts to their open position. The contactor provides AC to my
power
> > supply and power to my Porter Cable router. The contactor that I use
also
> > has a normally closed contact that I wire to my Gecko drives disable
line.
> > When the contactor is energized, the disable line is open.
> >
> > The momentary switch is wired to energize the contactor. The sequence is
> to
> > turn on the on/off switch. This turns on my fans and applies 110 VAC to
> one
> > side of my momentary switch. By momentarily turning the momentary
switch,
> > 110 volts is applied to the contactor coil and energizes the contactor.
> One
> > contact is used to then apply 110 volts back to the coil keeping the
coil
> > energized (latching relay ). When you release the momentary switch, it
> > reverts back to it's off position.
> >
> > Yes, the linear rails are attached to the extrusion with T-nuts. I have
> them
> > listed in my bill of materials.
> >
> > I hope that some of this helps. I will be adding another section to my
> power
> > supply PDF write-up in the next couple of weeks.
> >
> > Bob Campbell
> >
> > -----Original Message-----
> > From: J.Critchfield [mailto:js3mc@...]
> > Sent: Tuesday, May 07, 2002 9:25 PM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Subject: Re: [CAD_CAM_EDM_DRO] Connectors, switches etc.
> >
> >
> > Bob,
> >
> > > For limit switches, I like Proximity switches.
> >
> > How do these work?
> >
> > > On my latest system, I used a contactor which is connected to my EPO
> > switch
> > > to drop all power if necessary including the power to my router. The
> > > contactor also has a special normally closed contact that I use to
> connect
> > > to the disable contact on the Gecko drives.
> >
> > What is a contactor? How is it wired to the EPO? How is the router
spindle
> > wired to all this? Ak!
> >
> > I looked over your web site- very helpful. A comment about the power
> supply
> > page- The diagrams are too small to read and printing is no better (not
so
> > helpful)
> >
> > I looked over the bill of materials and I have one more question (yeah
> > right) What is the momentary switch for?
> >
> > Oh ya! Looking at the pics of the machine. How did you attach the linear
> > guides to the extrusion? Custom T-slot nut(s) or????
> >
> > Thanks,
> >
> > Jay
> >
> >
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >
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if
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> > 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.
> >
> >
> >
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> 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.
>
>
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
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> Addresses:
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> 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.
>
>
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
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