24V Endstop on Duet3 6MB

[jay_s_uk]

@neo0204 are you testing them with M119 in both the triggered and untriggered state?
it will only report the state they are in at that moment in time
best to make sure they aren't triggered (LED unlit) and run M119. Then trigger them and do the same

[neo0204]

@jay_s_uk Yes, i am testing it in both states.
But it's giving the same results on M119.

[neo0204]

@jay_s_uk Also when the sensor is triggered, I checked with the multimeter, and it's passing the 24V signal to the board.

Am I am missing something in the config file or at the firmware level?

[jay_s_uk]

@neo0204 I take it the 24v PSU you are using is the same one you are powering the board with?
you may need to use the internal pullup resistor.
add a ^ to the pin name

[neo0204]

@jay_s_uk Yes the PSU is the same,

Like this?

M574 X1 S1 P"!^io0.in" 

[jay_s_uk]

@neo0204 yep

[neo0204]

@jay_s_uk I tried this yesterday and sadly it's not working.

What else I can do to make it work?

[dc42]

@neo0204 said in 24V Endstop on Duet3 6MB:

@jay_s_uk Also when the sensor is triggered, I checked with the multimeter, and it's passing the 24V signal to the board.

Am I am missing something in the config file or at the firmware level?

An NPN sensor will not output 24V. I suspect you have a PNP sensor.

[neo0204]

@dc42 Thank you for your response.

I have got this, Is it PNP or NPN?

If it is PNP, how do I connect it to the duet board.

[neo0204]

@neo0204 Confirmed it from igus documents, it's PNP.

Please help me on how to connect this.

[dc42]

@neo0204 see https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe?revisionid=HEAD#Section_PNP_output_normally_open_inductive_or_capacitive_sensor.

[neo0204]

@dc42 Thank you, I will try this.