Inductive Sensor

[golden haven]

Guys! need help. It is necessary to connect the inductive sensor to the 3D printer board as a 3-sensor. direct connection (black - signal; blue -; brown +) does not give results.
More precisely. when you bring the metal the light comes on, but the board does not see the operation.

Motherboard: MKS SKIPR https://github.com/makerbase-mks/MKS-SKIPR

Inductive Sensor : NPN DC 6-36V/LJ12A3-4-Z/BX LJ12A3-4-Z

Any instructions or ideas?

(The motherboard, if anything works! I checked it through the Limit Switch Microswitch - Everything works)

[hallow torrent]

AI Help

It sounds like you need to configure the firmware on your MKS SKIPR motherboard to recognize the inductive sensor as a homing or limit switch. Here are some steps you can follow:

1. Make sure your inductive sensor is properly powered - it requires DC 6-36V.

2. Connect the sensor's brown wire to the positive (VCC) pin on the board, black to the signal pin, and blue to the ground (GND) pin.

3. Open the configuration.h file in your firmware and look for the section on homing or limit switches.

4. Uncomment the line for "z_min_endstop" and set the value to "probe". This tells the firmware to use the probe input as the Z minimum endstop.

5. If you're using Marlin firmware, you also need to enable the "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN" option.

6. Save the config file and upload the new firmware to your board.

7. Test the inductive sensor by manually triggering it with a metal object while sending a M119 command to check the endstop status. The status should change from "Open" to ...

WARNING: This response is AI generated and may contain errors.

[grave gale]

ok, so I'm not exactly certain but the important thing is to get the schematic for your probe and connect it correctly to your motherboard, for which you will also need a schematic - you can google for both of those things. Typically there is a sensor connection and a probe connection; there may be an additional one - maybe ground I can't remember

I'm not familiar with that motherboard or probe though so that's the best I can offer at present without googling for you

I would search for e.g. '<insert motherboard name> schematic' and also '<insert probe technical name> schematic'

then compare and contrast

[noble onyx]

Ok so the board is probably providing 5 VDC and as per the spec of the sensor it needs 6 to 36 VDC

SO you need to power it from your PSU then step down the signal voltage

Theres a few videos out there how to do that >> https://youtu.be/il9bNWn66BY

[golden haven]

not entirely correct. there is a jumper that allows you to supply power to the sensors at 24 V
https://github.com/makerbase-mks/MKS-SKIPR/blob/main/hardware/MKS SKIPR V1.0_002/MKS SKIPR V1.0_002 PIN.pdf

[ember pawn]

What's the behavior right now?
So when presenting a conductive object below the probe, it lights up and how are you checking functionality in klipper

Using the endstop status check?

[golden haven]

Yes

[ember pawn]

Assuming it's wired up properly and it's a config issue

You can try inverting the pin with ! And see if that makes any difference

Confirming it just with the endstop check and some metal of course

[golden haven]

can be more
I do not understand much (I translate through Google translator)😅

[noble onyx]

Typically inductive or capacitive sensors switch their supply voltage !! SO be careful you dont blow the signal line !

[noble onyx]

the question is , is the input tolerant of a supply voltage signal ?

[golden haven]

signal line intact. checked the board through the mechanical limit switch. (like this) the board sees the switch, and works fine with it

[golden haven]

Don't know. if you need any tests
tell me what to check
And I'll send you the results.

I tried to solder according to this scheme. did not give results

[golden haven]

I'll check it out tomorrow or today
I will write about the result.