PL08-N Probe not working with duet wifi

arze

As the title says, my pl08-n is not working with my duet. DWC shows 0 no matter if its triggered (light goes on and voltage is raised measuring from input on duet). Here is my Gcode for setting up the sensor

M558 P8 I0 T18000 F1200 H5 A5 S0.01 B0 R0.2

and im following https://d17kynu4zpq5hy.cloudfront.net/igi/duet3d/ogA64gS3SXCmPhsQ.full directly for wiring, so im 99% sure it is a software issue

droftarts

@arze need more details. Firmware version (send M115, post reply), Duet type, full config.g, picture of wiring, specifications of probe. Because my crystal ball isn’t powerful enough to see into your mind! See https://forum.duet3d.com/topic/5909/guide-for-posting-requests-for-help

Ian

arze

@droftarts Im sorry, Here is some more info

RepRapFirmware for Duet 2 WiFi/Ethernet: version 2.05
ELECTRONICS: Duet WiFi 1.02 or later + DueX5
FIRMWARE_DATE: 2019-12-13b1

My pl08-n shows 0.2v or 0.8v when measured from the PROBE IN pin on duet, depending on weather or not its activated, so i know it is sending some sort of a signal.

My config.g is not setting up the probe but here is my macro that does plus the config is uploaded

here is my config

here is my macro:

M400
M558 P8 I0 T18000 F1200 H5 A5 S0.01 B0 R0.2
G31 T8 P500 X0 Y25 Z3.45 ; inductive probe offset, not critical, only used for coarse homing
G4 P200

And this is the probe i am using https://www.aliexpress.com/item/32803898660.html?spm=a2g0s.9042311.0.0.27424c4dory9K2

dc42

You need to use i1 in the M558 command for an NPN probe, not i0, but apart from that I don't see anything wrong. The diode in the circuit is needed when connecting to older Duets, not recent ones.

If the NPN probe output has a large amount of leakage then you might need to use an extra pullup resistor between Z probe in and +3.3V.

arze

@dc42 when doing i1 DWC shows 1000 to start. ill try the pullup method now though

dc42

@arze said in PL08-N Probe not working with duet wifi:

@dc42 when doing i1 DWC shows 1000 to start. ill try the pullup method now though

Any value between 1K and 10K should be suitable.

arze

@dc42 Hey! I used a 9.6k pullup between IN and 3.3v, and removed diode. with either/both of these DWC still shows 0 no matter what. (after running the macro) Testing the voltage now it is either 0.35 (not triggered) or (0.8 triggered)

dc42

@arze said in PL08-N Probe not working with duet wifi:

Testing the voltage now it is either 0.35 (not triggered) or (0.8 triggered)

The voltage should be much higher than 0.8V when triggered, more like 3.3V. What Z probe reading do you get if you disconnect the sensor from the Z probe input?

CarlJ

Hello, maybe I should have started another thread.
Using this probe and setup I get Bad command r0.2
What is the function or meaning of r0.2
If more information is needed please let me know.

Thank You

dc42

@CarlJ said in PL08-N Probe not working with duet wifi:

Hello, maybe I should have started another thread.
Using this probe and setup I get Bad command r0.2
What is the function or meaning of r0.2
If more information is needed please let me know.

Thank You

I agree, you should start another thread. In that thread, please post your config.g file, also deploy,g and retract.g if you have them. If the error message is generated in response to G32, post bed.g also; or if it is generated in response to homing, post homeall.g and homez.g.