proximity sensor PNP

Leblond

I accidentally got a PNP capacitive adjustable proximity sensor instead of the usual NPN.
Having mounted a magnetic bed about 4mm high and a 6mm heated plate of non-deformable aluminum at high temperatures milled on both sides and already having an inductive sensor NPN XY-08n "Tronxy" which works quite well "when it comes to normal aluminum or steel "and connected on the fan connector always active as 24v power supply and signal on Z_PROBE_IN, but it measures too little 0.8mm and forces me to remain dangerously low in the printing phase, I had already used the PNP sensor in the past with excellent results, now what I ask you is there a figure that shows the functioning electrical connection of the PNP sensor?, I looked at some post in particular the one who realized after burning the card that patience is the virtue of the strong , can you help me to have a diagram of how it should be connected without damage?

A Former User

This post is deleted!

fcwilt

@leblond

Have you used a capacitive sensor before? I tried a few and their response time was much slower than a good inductive sensor.

What Duet board are you trying to connect to? Duet 3 boards have inputs that will tolerate 30 volts (as I recall).

If that is what you are using you should be able to connect to one of these and see if the signal out of the sensor is adequate to be seen by the Duet.

Frederick

Leblond

@fcwilt Forgive me you are right I have described the problem without giving you information.
My card is a duet 2 wifi v1.04 with firmware 3.4.1
the printer is a corexy tronxy
the voltage is 24v except for the bed which is 220v
yes I used them a couple of years ago but I don't remember anything anymore
the problem as I described at the beginning of the post is that the aluminum base of the printer is not made for an inductive sensor, so having the PNP sensor capicitivo and I wanted to exploit it

A Former User

This post is deleted!

fcwilt

@leblond said in proximity sensor PNP:

@fcwilt Forgive me you are right I have described the problem without giving you information.
My card is a duet 2 wifi v1.04 with firmware 3.4.1
the printer is a corexy tronxy
the voltage is 24v except for the bed which is 220v
yes I used them a couple of years ago but I don't remember anything anymore
the problem as I described at the beginning of the post is that the aluminum base of the printer is not made for an inductive sensor, so having the PNP sensor capicitivo and I wanted to exploit it

Well, as mentioned, you can connect to the Z Probe In connection as long as you add the pulldown resistor mentioned.

When testing the sensor be sure and compare the results from probing with varying "feed rates", the F parameter in M558.

IF capacitive sensors are as slow as I remember (and at my age my "rememberer" is suspect) you may have to probe slowly.

When you get it working let us know how it performs.

Thanks much.

Frederick

Leblond

@arnold_r_clark said in proximity sensor PNP:

Connect the sensor output wire to one end of a resistor (call this R1), and connect one end of another resistor (call this R2) to GND on the Z-probe connector. Connect the free ends of R1 and R2 together and to the IN pin of the Z-probe connector.

that is, as in the picture?

Leblond

@fcwilt ok grazie