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    duet 3 connecting z probe inductive sensor

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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      @1997alex said in duet 3 connecting z probe inductive sensor:

      C"!^io5.in"

      Try removing the ^ to disable the pull up resistor.

      Z-Bot CoreXY Build | Thingiverse Profile

      aprzundefined 1 Reply Last reply Reply Quote 0
      • aprzundefined
        aprz @Phaedrux
        last edited by

        @Phaedrux ok, just removed the “^” from in front. Still nothing. Just to clarify, it’s supposed to show 0 under “z probe” when it’s not sensing and 1000 when it is, right? Not sure if it’s my code still or wiring ? I have it wired from the 3.3v to the ground and io5in.

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        • Phaedruxundefined
          Phaedrux Moderator
          last edited by

          Can you post a photo of how it's wired up?
          Does it have it's own indicator light showing when it's triggering?

          Z-Bot CoreXY Build | Thingiverse Profile

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          • aprzundefined
            aprz @Phaedrux
            last edited by

            @Phaedrux

            ; Z-Probe
            M558 P5 C"!io5.in" H5 F120 T6000                   ; set Z probe type to switch and the dive height + speeds
            G31 P500 X41 Y41 Z2.5                              ; set Z probe trigger value, offset and trigger height
            M557 X15:215 Y15:195 S20                           ; define mesh grid
            
            

            2020-09-03-224527_1920x1080_scrot.png

            IMG_1722.jpg

            IMG_1723.JPG

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            • aprzundefined
              aprz
              last edited by

              So, the light turns on when I put a metal object under the sensor but doesn't indicate whether its on in the RRF dashboard . The value stays at 0 under "z probe".

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              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                I suspect a bad signal wire from your probe.

                In your photo, which wire is which?

                Z-Bot CoreXY Build | Thingiverse Profile

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                • aprzundefined
                  aprz
                  last edited by aprz

                  the green (actually brown) is the positive, the black is the sensor, and the blue is negative. i may be wrong. reference diagram.
                  ogA64gS3SXCmPhsQ.jpg

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                  • Phaedruxundefined
                    Phaedrux Moderator
                    last edited by

                    You have the brown/green wire connected to the 3.3v for power.

                    The diagram shows the probe being connected to 12/24v vin.

                    Does your probe function at 3.3v or does it need more?

                    Z-Bot CoreXY Build | Thingiverse Profile

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                    • aprzundefined
                      aprz @Phaedrux
                      last edited by

                      @Phaedrux I just connected it to vin 24v but still see no difference in the z probe value.

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                      • Phaedruxundefined
                        Phaedrux Moderator
                        last edited by

                        Do you have a link to information on what probe it actually is?

                        Z-Bot CoreXY Build | Thingiverse Profile

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                        • aprzundefined
                          aprz @Phaedrux
                          last edited by aprz

                          @Phaedrux This is the exact one. looks like the pnp style sensors require a resistor?

                          https://www.amazon.com/Twidec-Inductive-Proximity-Detecting-LJ18A3-8-Z/dp/B07WS45K3P/ref=sr_1_1?dchild=1&keywords=b07ws45k3p&qid=1599193793&sr=8-1

                          Phaedruxundefined 1 Reply Last reply Reply Quote 0
                          • Vetiundefined
                            Veti
                            last edited by Veti

                            can you show us your new wiring

                            aprzundefined 1 Reply Last reply Reply Quote 0
                            • aprzundefined
                              aprz @Veti
                              last edited by aprz

                              @Veti Here it is. Picture 1 shows the signal wire connected to io5.in and picture 2 shows the positive and negative wires in 12v supply.

                              8F35663A-DB96-410E-AB41-A392A2A1ED8B.jpeg 9DEAE847-AC3A-45BA-BEFA-5D682EE716C3.jpeg

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                              • Phaedruxundefined
                                Phaedrux Moderator @aprz
                                last edited by

                                @1997alex said in duet 3 connecting z probe inductive sensor:

                                @Phaedrux This is the exact one. looks like the pnp style sensors require a resistor?

                                https://www.amazon.com/Twidec-Inductive-Proximity-Detecting-LJ18A3-8-Z/dp/B07WS45K3P/ref=sr_1_1?dchild=1&keywords=b07ws45k3p&qid=1599193793&sr=8-1

                                Ok, so it's a PNP NO sensor not NPN.

                                https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_PNP_output_normally_open_inductive_or_capacitive_sensor

                                See if this makes a difference.

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • aprzundefined
                                  aprz
                                  last edited by aprz

                                  Ok,I ordered a few 10k, 30k and 68k resistors. I’ll follow up on how it comes out or whether it works. Here’s a drawing of how I’m understanding from the article how to connect the resistor to the duet and sensor. If this doesn’t work I’ll just buy a npn sensor. The yellow lines are the two resistors tied together and connected to ground and sensor wire.by the way the positive is going to be connected to 12v pin. Correct me if I’m wrong or a potential .
                                  DE740FD6-62A9-42E7-ABA7-235AF5C10E5F.jpeg

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                                  • aprzundefined
                                    aprz
                                    last edited by aprz

                                    Ok never mind the resistors, I’ll try that out later but I just ordered another probe that is a npn swapped it out. It works just had to fix a couple wiring issues but anyone out there wanting to use a inductive sensor make sure it’s a npn inductive sensor, also the sensor works with the 3.3v power in the io5 pin and didn’t need to wire it to the vin or 12v. I have the brown going to 3.3v, the blue going to ground and the black going to “io5.in”. Well thanks for the help problem solved.👍

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