Inductive Probe not working (led always on)

Hey guys, I need help getting a inductive probe from pepperl & fuchs to work. Today I got an inductive probe from Pepperl & Fuchs (NPN NO) and I connected it to my octopus 1.1. Its connected according to the ratrig doku and the octopus pinning. But for some strange reason, the LED of the probe is always on. No matter if I touch metal or not. Any Idea what could be the issue? Regards!
50 Replies
foreign-sapphire
foreign-sapphire2y ago
foreign-sapphire
foreign-sapphire2y ago
No description
miklschmidt
miklschmidt2y ago
that indicates the probe itself doesn't work or is miswired wiring looks correct
foreign-sapphire
foreign-sapphire2y ago
I know, BUT this is actually already the second probe that I ordered cause the first one showed the same behavior. But i dont think its likely that both are broken https://files.pepperl-fuchs.com/webcat/navi/productInfo/pds/304615-0117_ger.pdf?v=20230215161412
miklschmidt
miklschmidt2y ago
What i'm trying to say is you can't change this behavior via config If it doesn't change the state of the LED when you touch metal to it, it doesn't detect your metal. Most likely it wants more voltage Even though it says it works from 5-30. In that case you'll have to use the probe port, which doesn't work with NPN probes (if that's a Octopus 1.1 i'm seeing). So you'd have to get a schotky diode to solder in.
foreign-sapphire
foreign-sapphire2y ago
... ah ja. do you have more information for that? funny thing is that this probe is sold by squishworx as PINDA
blacksmithforlife
Did the probe come with a wiring diagram? Could be that it isn't wired like it normally would be?
miklschmidt
miklschmidt2y ago
it's rare that they fuck the colors up According to the wire colors in the pic it's wired correctly
foreign-sapphire
foreign-sapphire2y ago
No description
foreign-sapphire
foreign-sapphire2y ago
thats in the data sheet
blacksmithforlife
Wait, isn't that picture showing it is connected to the bl touch port and not the prob port?
blacksmithforlife
GitHub
BIGTREETECH-OCTOPUS-V1.0/BIGTREETECH Octopus - PIN.pdf at master · ...
This is Octopus open source material. Contribute to bigtreetech/BIGTREETECH-OCTOPUS-V1.0 development by creating an account on GitHub.
foreign-sapphire
foreign-sapphire2y ago
its the same port?
blacksmithforlife
Ok, sorry. My brain is fried after a long day at work
miklschmidt
miklschmidt2y ago
basically you just solder in a BAT85 diode in the signal wire. and connect the red wire in your pic to 12 or 24V.
foreign-sapphire
foreign-sapphire2y ago
so you really think 5V isnt enough for this probe
miklschmidt
miklschmidt2y ago
Before you do anything, measure the output on the signal wire with a multimeter
foreign-sapphire
foreign-sapphire2y ago
ok what results do u expect
miklschmidt
miklschmidt2y ago
I don't know. I can see it says 5-30v in the datasheet. So that's my best guess, if it doesn't change the state of the LED when holding metal to it. If it was functioning correctly, the signal wire would be ~5V when the probe senses metal, and ~0V when it doesn't. When connected to 5V that is.
foreign-sapphire
foreign-sapphire2y ago
between black and blue I have 0,xx v
miklschmidt
miklschmidt2y ago
at all times?
foreign-sapphire
foreign-sapphire2y ago
ja
miklschmidt
miklschmidt2y ago
Yeah so it's not working It's not sensing metal Only thing i can think of trying is using a higher voltage (because it's a 5-30V probe, it works best closer to 30V)
foreign-sapphire
foreign-sapphire2y ago
can I just hook it up to 24v
miklschmidt
miklschmidt2y ago
Yes as long as the signal pin isn't connected directly to a GPIO pin (because then it'll fry the mcu)
foreign-sapphire
foreign-sapphire2y ago
I mean for testing if the LED status changes
miklschmidt
miklschmidt2y ago
Same answer 😄
foreign-sapphire
foreign-sapphire2y ago
yes I unplug black so - sorry for asking again - the led should trigger with only VCC and GND connected? no need to stimulate the pullup resistor?
foreign-sapphire
foreign-sapphire2y ago
foreign-sapphire
foreign-sapphire2y ago
24v does the trick.
firm-tan
firm-tan2y ago
Where did you end up plugging it in? Out of curiosity for my build
foreign-sapphire
foreign-sapphire2y ago
24v. Just to test. @miklschmidt had the idea that 5v isn’t enough
firm-tan
firm-tan2y ago
ahh, interesting thanks
miklschmidt
miklschmidt2y ago
Right so you want a BAT85 in the signal line. Squishworx should probably stop selling those as a superpinda as those are 5V exclusively They're also NPN NC, which you very much want for safety
foreign-sapphire
foreign-sapphire2y ago
I will tell them I know. Seems like the Squishworx channel was deleted over night??
miklschmidt
miklschmidt2y ago
They deleted their user, seems like they vanished from the discord. So the channel was deleted archived
foreign-sapphire
foreign-sapphire2y ago
Great timing 🙂
miklschmidt
miklschmidt2y ago
It's still viewable here: #squishworx-🇺🇸 Honestly a little odd. Shoot them an e-mail.
foreign-sapphire
foreign-sapphire2y ago
I did. In the meantime I ordered another probe from Amazon
miklschmidt
miklschmidt2y ago
Where are you located? DE or US? There are multiple sources for SuperPinda's in the EU, not sure about the US though.
foreign-sapphire
foreign-sapphire2y ago
Since last June I am in NY. For 3-5 years
miklschmidt
miklschmidt2y ago
Aah Lol squishworx even has the actual superpinda: https://squishworx.com/prusa-superpinda/ @_sebastianm i'd recommend you get that one this gonna have a bad time with a janky probe. Of course i don't know what you found on amazon. Aah the one you bought is a Pinda 2 replacement, ie. not a SuperPinda. Pinda 2 is a horrible probe.
foreign-sapphire
foreign-sapphire2y ago
I heard the opposite 🙂 that’s why I bought it But thx.
miklschmidt
miklschmidt2y ago
The SuperPinda is more expensive because it has passive thermal compensation, the Pinda 2 doesn't (the original one has active compensation via a built in thermistor, only supported in marlin). It'll bounce all over the place on a heated bed, so completely unreliable. Even with the compensation they were reported to be quite janky
foreign-sapphire
foreign-sapphire2y ago
Bummer.
miklschmidt
miklschmidt2y ago
That's why we recommend SuperPinda's (it's also the probe we put in the default v-core 3 kits)
foreign-sapphire
foreign-sapphire2y ago
I know. Are you from .de? Squishworx answered and refunded both probes.
foreign-sapphire
foreign-sapphire2y ago
No description
miklschmidt
miklschmidt2y ago
I'm from dk That's good customer service 👍
Want results from more Discord servers?
Add your server