Using a WORKING NPN NO DC 6-36V 300mA LJC18A3-B-Z/BX Sensor. TESTED IT on my original FT-5 and works fantastic,
BUT on my new build(same RAMPS 1.4V KEYES BOARD), the SENSOR will only operate properly while plugged into my computer thru USB.prot (The SENSOR's light stays on, when not connected thru USB, likewise the Z-AXIS motors locked_light being on meaning Z -STOP is triggered and Z-MOTORS won't budge.
PLUG it in thru USB and the issue disappears, light goes ON/OFF as it should. And Z-MOTORS work properly - PLEASE tell me what could be wrong?
(SENSOR behaves the same way in every STOP PORT, regular mechanical sensors behave normally - VERY BIZARRE!