Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: jon b on August 25, 2020, 04:16:37 AM
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Hi guys please excuse me if this is not directly connected to mack 3 but i would like to install a touch probe to the interface board on my cnc , my problem is i have used all 3 available inputs 10/13/15 for limit switches xyz . is there a way to loop the 3 switches to one available input thus freeing up 10 or 15 and how may i do this ?
kind regards Jon
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If your limit switches are wired N.C. (normally closed contact) then just connect all three switches in series and then connect to just one input.
(If your switches are wired N.O. (normally open contact) then the switches are connected in parallel)
Tweakie.
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Hi guys please excuse me if this is not directly connected to mack 3 but i would like to install a touch probe to the interface board on my cnc , my problem is i have used all 3 available inputs 10/13/15 for limit switches xyz . is there a way to loop the 3 switches to one available input thus freeing up 10 or 15 and how may i do this ?
kind regards Jon
What model BOB are you using?
It may be cheaper to change the BOB to one with 4 or more inputs
or
If using parallel ports, add another PCI parallel port card + another $10 BOB for MORE inputs and outputs.
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hi mike c here hookup z touch probe (i watch a video from guru brew) but when i touch the ground lead to the spindle the limit switch trips
and the digitized button is on when i touch the probe ground to the plate it goes off
can you help thanks mikec
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Config -> Ports & Pins -> Input Signals
Check the state of Probe input. If needed, check Active Low to reverse behavior of your probe.