Does the homing switch test as working?
Is it physically positioned so that it will be activated when the Z-axis spindle carriage plate lifts up?
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Yes it does test as working. I also always check it with a piece of metal before I start the homing cycle just to make sure. In the picture I sent you can see the light on the sensor on as it crashed. In fact you can see the light on the sensor turn on as the plate approaches the sensor but it doesn’t stop and just keeps going.
Is the indicator light signal on a different wire than the wire that actually communicates with the control board letting it know where it’s at?
@LiveCoal To my understanding, yes, the ‘limit reached’ signal back to the controller is the third wire. The LED will light even if the third wire is not connected to the controller. This suggests that the third wire is somehow not connected, or the wire is broken. If the controller LED lights up when you test the sensor with a piece of metal, then it suggests a control PCB fault. If it doesn’t, it suggests a wiring fault.
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