Photo limits

[Don C]

Want does it take to have a photo limit switch instead of regular limits. want would the circuit look like.
Thanks
Don C.

[Al_The_Man]

Go here and look up the slotted opto coupler description.
http://electronents.v21hosting.co.uk...plications.htm
Al

[bgolash]

Here`s a part number from http://www.digikey.com/ 425-1060-5-ND
I`m going to use these. They work with the bob campbell`s breakout
board. If your using that board here`s instructions for the wiring.
Wire a 1k resistor in series with the anode pin 3 and the +12v terminal and 2 to the gnd terminal and 1 to signal
terminal.

[Don C]

could you draw that circuit out for me? You have me lost.
Thanks
Don C.

[bgolash]

Hi
I am no expert with this wiring. I just tried the photointerruptor
with my breakout board and it worked fine. There is a 1 K resistor
that I soldered to the end of the red wire. This protects the LED
inside the photointerruptor from seeing too much current. If you
don`t include the resistor the LED will burn out.

[Don C]

is that power to the + and - and the switch is between the out to -
Thanks
Don C

[bgolash]

Hi Don C

I don`t understand your question. Here is a doc
that shows the pin layout of the photointerruptor.
http://rocky.digikey.com/WebLib/Shar...ta/gp1s73p.pdf

[Don C]

I got the limit to work but backwards. Im using a pmdx breakout board and I have the limit connected to +5 -5 and pin 11. I'm using Mach2 and it enables my drive (XYZ)axis only when you put something infront of the limit. and I only have it connected to x+

[Bloy2004]

go into your limits configuration and change the "active high/low" setting...then try.

[bgolash]

Hi

I could be wrong on this point. I think Mach2 allows
you to configure a high or low for the limit. It might
be possible for you to make this work from the Mach2
software.

[Don C]

under conf. there isn't limits. Under ports and pins there is but no active high low setting that I can see. and it shuts all axis down and I only have x++ checked.
Thanks
Don