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General Mach Discussion / Re: Input Pins Are allways high (+5 volts) can not toogle on/off Limit Switch
« on: December 10, 2007, 05:17:07 PM »
Thanks guys, I will try all of your recommendations and thanks for the speedy replies. I will let you know if they work, and, if you like, post some pics of my machine.
But just so I am clear, you don't have to apply voltage to the input pins?
You can either have N.O. switches that ground out the +5 volts when tripped or
N.C. switches when tripped, open the circut (thus, the +5 volts is still present in the pin)
You can only tell Mach3 how to interpret the presence of +5 volts in the pin i.e. +5 volts = high or +5 volts equals low
Here is the listing description of the limit switch board from Ebay and a scanned page from the manual.
"This board makes connecting limit switches and home switches to your computer from your machine easy and gives the most positive active high input that can be used with virtually any CNC Software. It has a power supply input and a 5 volt DC regulator and pull up resistors that will send positive +5 volt input signals from your limit switch to your computer. It allows you to use any or all 5 of your computers input pins (any ones that your software allows) to input home or limit switch signals to your software. It allows multiple limit switches per input. Comes with complete documentation including description and wiring diagrams. You will need a 5-20 vdc power supply to power this board, or buy our combo with power supply."
But just so I am clear, you don't have to apply voltage to the input pins?
You can either have N.O. switches that ground out the +5 volts when tripped or
N.C. switches when tripped, open the circut (thus, the +5 volts is still present in the pin)
You can only tell Mach3 how to interpret the presence of +5 volts in the pin i.e. +5 volts = high or +5 volts equals low
Here is the listing description of the limit switch board from Ebay and a scanned page from the manual.
"This board makes connecting limit switches and home switches to your computer from your machine easy and gives the most positive active high input that can be used with virtually any CNC Software. It has a power supply input and a 5 volt DC regulator and pull up resistors that will send positive +5 volt input signals from your limit switch to your computer. It allows you to use any or all 5 of your computers input pins (any ones that your software allows) to input home or limit switch signals to your software. It allows multiple limit switches per input. Comes with complete documentation including description and wiring diagrams. You will need a 5-20 vdc power supply to power this board, or buy our combo with power supply."