Toolboard + NO NPN probe

[tecno]

@jay_s_uk

[jay_s_uk]

@tecno well there you go. use P8 and not P5

[tecno]

@jay_s_uk

a61bae5c-9ac9-475e-a5c0-a73e2738dc4c-config.g

Hard DIVE into the bed, led on probe lights up but no reaction to that

[jay_s_uk]

@tecno maybe you don't need the pullup?
best to check these things far away from the bed rather than relying on that as a last resort

[tecno]

@jay_s_uk
M558 C"!121.io0.in" P8 H10 F120 T8000

With probe not triggered Prove value is 0 triggered is 0

If I set probe not inverted Probe value is 1000 triggered still 1000

No change whatever I try

[jay_s_uk]

@tecno maybe you need a diode as detailed here https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_connecting#npn-output-normally-open-inductive-or-capacitive-sensor?
other than that, no idea

[infiniteloop]

@tecno said in Toolboard + NO NPN probe:

With probe not triggered Prove value is 0 triggered is 0
If I set probe not inverted Probe value is 1000 triggered still 1000

Either you have no signal on the pin, or it is constantly tied to 3.3V by the probe. Check function of the probe stand-alone with a multimeter: What voltages do you read when the probe is triggered/untriggered?

A third possibility might be the port being defective, but first, check your probe signal.

[tecno]

@infiniteloop

NPN and no 3.3V ! Vin as these need 6-30V

Vin non triggered = out Vin
Triggered = out under 0.6V

So probe is OK

Looks like the Tollboard is busted again

[tecno]

@jay_s_uk said in Toolboard + NO NPN probe:

@tecno well there you go. use P8 and not P5

Select mode 5 (P5) in the M558 command. Invert the probe output From the manual you linked !

[jay_s_uk]

@tecno https://docs.duet3d.com/en/User_manual/RepRapFirmware/CAN_limitations
only P8 and P9 can be used on CAN boards

[tecno]

@jay_s_uk

Doh... too many variables so confusing it is.

How can i check port that it is working? Short GND to INP or 5V?

Set it as P8 so I can see Probe value 0 or 1000

[infiniteloop]

@tecno said in Toolboard + NO NPN probe:

Vin non triggered = out Vin

Do I understand this right: The signal has 6-30V non-triggered?

[tecno]

@infiniteloop

Yes

[infiniteloop]

@tecno said in Toolboard + NO NPN probe:

Yes

Then you've fried the port.

[tecno]

@infiniteloop

That is what I suspect, not the first toolboard to go south on me.

[infiniteloop]

@tecno said in Toolboard + NO NPN probe:

How can i check port that it is working? Short GND to INP or 5V?

Yes, you can short GND to INP. Does this trigger the endstop?

[tecno]

@infiniteloop said in Toolboard + NO NPN probe:

@tecno said in Toolboard + NO NPN probe:

How can i check port that it is working? Short GND to INP or 5V?

Yes, you can short GND to INP. Does this trigger the endstop?

not shorted = value is 0
shorted = value is 1000

So go figure what is wrong, I only have 1N4148 diode's at hand no BAT´s

[infiniteloop]

@tecno said in Toolboard + NO NPN probe:

not shorted = value is 0
shorted = value is 1000

That's good news, the board still works. Your test means that the probe doesn't pull down the signal strong enough to trigger. Try the diode - according to the documentation, this might work:

The diode should preferably be a small-signal Schottky diode such as BAT43 or BAT85, but a small signal silicon diode such as 1N4148 works for some people.

[tecno]

@infiniteloop

Already tried the diod = no go

[infiniteloop]

@tecno Hm, I'm guessing, but maybe a pull-down resistor between GND and INP might help. Can't tell you a value, though, but I would start with something like 10k - and go down until the probe triggers reliably.