NPN NO Capacitive Proximity sensor not working unless touched

[Roberts_Clif]

Then lets ask some questions

1. Post your wiring diagram
2. What voltage are you using. // On my 6-30 volt proximity sensor I am using 5V without any added circuit.

[Maany]

Hello Robert

I'm using 12v directly from the power source (12v 20A) to power it, the output wire is connected to the input of ams1117 regulator, and the output of the regulator goes directly to Z-MIN Signal Pin, with the GND of the regulator connected to GND of RAMPS (Z-MIN GND).

my problem is not in the output, I believe it is with the power source, if you're using 5v to power your 6-30v sensor without problems, I guess i can try that too, you're sure it won't affect my sensor if i power it with 5v ??

[Roberts_Clif]

When I purchased my 3DP12 it came with a SN04-N Proximity Sensor it was connected to 5 volts.
I have switched to a Omron TL-W3MC2 6-30 volt Proximity Sensor had no problems during my 3 years using it on a 5 volt supply.