Switch Limits - CNCzone.com-The Largest Machinist Community on the net!

jarpo82 · #1 09-15-2007, 03:11 PM

Hi people of CNCZONE! I do this board ( http://www.pminmo.com/3axisPIC/3axisPIC.htm ) thats not have Switch Limits.
My question is: how I can do home/limit switches for x,y and z ? In this board the pins from 8 to 13 are free.

Thanks !
JARPO82

stirling · #2 09-18-2007, 04:37 AM

on a standard parallel port pins 10,11,12,13 and 15 are inputs so you can use any three from 10 to 13.

project5k · #3 09-18-2007, 02:07 PM

you could series all 6 of the hard limit switches together to one input and then use 3 other inputs for the home switches, as discussed in other areas i would suggest setting it up so that the switches are closed during normal operation and any break, ie a switch being triggered, a wire breaking, or anything like that would bring the system to a halt... seems a little safer that way..

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