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    PNP metal detectors instead of endstops for CNC

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    • AllSiriusundefined
      AllSirius
      last edited by

      Trying to connect my pnp metal detector 10-30v, using resistors, found output of 3-4v with multimeter, tried even 5v.
      Connected 12v external power supply to Sensor Brown and Blue and 4v to duet Ystop of my cnc machine (as it described in wiki)
      The led on the board is lighting, but when i send m119 command I'm receiving always NO signal or always ON signal if I'm changing the M574 from M574 Y1 S1 P"!ystop" to M574 Y1 S1 P"ystop".
      Tried to connect the ground signal of 4v in parallel to duet, also no changes .
      The led indication on duet is changing when I'm attaching the metal to the detector , but i don't see any changes in m119! Another metal detector I've tried didn't work at all. when i'm shortening the signal and +3.3v on duet I still see the feedback in M119 😇 , what is already makes me happy)) I don't want to go for regular normally open endstops for my cnc . Please help! Thank's for your support! Cheers!

      BTW, someone might be interested : I found a nice clear video explanation of how to check this sensors and find resistors for them..
      https://www.youtube.com/watch?v=wih4fNkKUCc

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