MCU Shutdown at Same Point On Multiple Attempts

General Discussion
1

Basic Information:

Printer Model: Ender 3 V2 NEO
MCU / Printerboard: Stock 4.2.2 Board
Host / SBC: RPI 3B+
klippy.log
klippy.zip (1.1 MB)

Fill out above information and in all cases attach your klippy.log file (use zip to compress it, if too big). Pasting your printer.cfg is not needed
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Describe your issue:

I was printing a Benchy, but the print has stopped in about the same spot (the extruder stopped less than a centimeter apart from the previous attempts), With an MCU error, and Klipper shuts down. after a firmware restart, the MCU is still down, requiring a reboot of the printer to function again. The printer and the Pi share the same power strip, and the Pi is saying it is being undervolted with a 2A charger, unsure if either of these would cause the issue shown in the logs. Let me know if more info is needed!

2

https://klipper.discourse.group/search?q=Lost%20communication%20with%20MCU%20mcu

3

I printed a 20mm Calibration Cube and it didn’t stop at all, maybe its something in my g code causing the pi to crash while its undervolted?

4

Sorry, apparently I just skipped over this piece of information: An undervolt condition or unstable power supplies are generally not an acceptable condition and need to be fixed.

5

The Pi3 needs at least 2.5A at 5.1V
Also, a charger is no power supply. Chargers are not stable enough.

6

@D86592 This is causing your problems.

1 Like
7

Thanks everyone, ordered a Pi official power supply, will update the post if the issue stands!

8

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