Hello,
Does anyone have any experience setting up limit switches using CNC Router Parts breakout boards? This is probably some silly oversight on my part but when I measure the sensor input (to the board) wrt that channel's GND I get 0V. Am i supposed to see 5V there?

My understanding is that one way to wire the switch is NC, which I thought should be equivalent to closing the circuit between Sens1 and Sens1 GND. Opening it would be equivalent of activating the switch.

With no potential difference between the pins I don't see how that would work. I measured the voltage across the "12VDC sensor power supply" (provided on the board for every sensor input port) and the GNDs and I get 5V. Assuming the 12V may be a typo in the manual I went on to try connecting the 5V to the sens1 pin and both pulling up and pulling down the pins.

Any way that I try I can't seem to get the signal to be recognized in mach3.

Any ideas would be greatly appreciated!