P-bot switch triggered running I2

[mati]

High-level goal
I’m trying to print on my VOLTERA V ONE but an error keeps coming out

Steps taken
First I home the machine.

Then i open the console and check the status of the switches with D2 command.

top (z max) and calibration plate (p-bot) are triggered without doing anything.

Then i run I2 C2 command and the next message comes up:

Diagnostic procedure failed
Unable to complete movement, top (z-max) triggered at Z=-0.003750

At this point, i decide to talk to the Voltera support team about this, the only solution that they gave me was cleaning the calibration plate area (p-bot) with isopropil alcohol and a q-tip (cotton swab).

I have tried this many times and the error is not going away, both switches are still triggered.

Then, i noticed that the motherboard of the printer has a copperish colour on that area, so i told this to the voltera team and they said that maybe one of the switches is causing a short on the motherboard.

How can i check this? i have a multimeter but i dont know what to test with it

And if this is the case, what can i do to fix it?

Have any of you guys have experienced this problem? What did you do?

Maybe i’m wrong, but i think that z max switch is triggered because of p bot triggered so it stops the z axis, but when i put a little bit of force on the probe it becames open, so i don’t really know.

Appreciate any help or comments about this topic, thank you.

[cborn]

Ink “droppings” clogging the bottom switch plate has been a common problem for me, you may be able to blow them out while jiggling to clean the area or worst-case dismantle it, which is pretty easy.
There was a problem with some of the switches used in early (Kickstarter) machines, I thought that had been resolved. They sent me a replacement for mine, however the PCB spacing had changed and it didn’t fit.
I still get by with a bit of jiggling, if that doesn’t get you going I’d open it up. As I recall the switch contacts are pretty easy to get to, power the machine off and use your meter on diode-test/buzzer to check that the switch is open when nothing is pressing on it, closed when pressed.If not ask support if they can send you a replacement.