Z Probe always TRIGGERED, even when the probe is disconnected
Had a little accident today and during homing the reverse bowden tube tangled up and yanked out my X End Stop, destroying it. I have replaced it and now it works as it should but now Z Probe (inductive) always read as triggered.
It doesn't matter if it is actually triggered or not, always reads the same. When triggering manually, a red LED comes on but it is still triggered.
I am always clicking the refresh button, to see the change of the status.
I have disconnected the probe completely from the board so nothing is connected to PB7 pin, but it still reads as triggered.
Now I am starting to think that maybe something has been damaged on the board when that X End switch have been damaged, maybe there was a short circuit for a brief moment and burnt something and there is voltage leakage to pin PB7.
But everything else on the board works fine, every other sensor or motor.
Is there another pin on the board I could safely use to connect the output from the probe and use?
Obviously, I will have to change the pin definition.
11 Replies
like-gold•17mo ago
Forgot to mention this - Octopus Pro 446
Hello @_hedeon I am in the same situation when I plug or not the probe it is always trigger. Did you find a solution to your problem ?
What probe are you guys using? And is it selected in the .cfg file?
I use a general NPN probe wired on the probe_pin (PB7) (Octopus board), I tried with and without a 4k7 resistor between the Power and the Signal cable. On the main cfg file the pin is declared on the same pin. My issue is that the value of the probe is always "trigger" and never change.
It's normally closed, thats why it's always triggered. When it detects metal it will go open.
Yes but when it detects metal the value doesn't change (it stays trigger) while the red led on the probe is turned on. The probe detects the metal but the board doesn't get the change.
I'll need to check my config. You have bltouch pins uncommented in your cfg?
When using an inductive probe?
I'll check that but normally no
Can the signal port from the board read 12V or is it limited to 5V ? Because when the probe doesn't detects metal the signal port gives 12V and when it detects metal it goes to 0,6V.
Did any of You guys resolved this problem?
im also using cnc inductive probe NPN NC, plugged in J40 port on BTT Octopus 446, and probe doesnt change a state
Ok here is my solve:
after change from mini super pinda to cheap cnc probe needed to change pin prefix to ~ instead of ^