That sensor is a NC NPN sensor. It works by always grounding the signal wire until it's tripped, in which case the circuit opens and the signal wire should be pulled high by a pull up resistor. It should be wired and configured just like a NC mechanical switch with the addition of the extra wire to power the sensor, so you should enable the pull up resistor in the config file and ditch the voltage divider resistors. That sensor is a 12V sensor so you won't be able to use the 3rd pin on the endstop connectors on the ramps board. Those are only 5v. You'll need to steal the power from the 12V aux connector by D2 (better for fused protection) or from the power supply (unfused).
↧