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bigtreetech / EBB

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Max31865 Overvoltage or undervoltage fault #2

Open 710920772 opened 2 years ago

710920772 commented 2 years ago

Max31865 Overvoltage or undervoltage fault Once the underlying issue is corrected, use the "FIRMWARE_RESTART" command to reset the firmware, reload the config, and restart the host software. Printer is shutdown

When i was printting,It suddenly appeared!!!!! I don't konw why???????????? the wire connected solid! And no indication towards Leakage!It just suddenly happen!!!!!!!!

Voodoobrew101 commented 2 years ago

If you power by a smart usb charger, the power in usb c is not fixed. I don't know what controlls it. But I suspect the charger is doing an assessment to decide what power to provide. Also faulty peripherals can cause or possibly housing power brownouts caused by say...a refrigerator compressor kicking on.

Get a proper pi power supply and the problem should go away. If you really never want to see it also get a battery backup with power conditioner.

Oh nevermind my error was different it mostly happened on startup.

That's the thermocouple rtd to digital chip.

Check jumpers for your thermo couple are corect.

Check thermocouple wires not loose or touching.

Check thermo couple wires in corect place?

Just guessing, I never used that part. I use the standard thermocouples that don't need the Max31865 chip.

se508 commented 1 year ago

I had the same issue and solved it. It was on a Voron with Octopus Pro board. On the Voron the hotend is not grounded, so the potential is floating. With a heater connected even a very small leak current may be problematic. One solution is to ground the hotend to 0v rail. Another is to ensure there is no leak current from the heater to the sensor (replacing the heater in my case).