Printer stopped midprint, light is turned off, and the followind msg appeared on the screen: “MCU extra_mcu shutdown: Move queue overflow Once the underlying issue is corrected, use the FIRMWARE_RESTART commandto reset the firmware, reload the config, and restart the host software. Printer is shutd…

Extra MCU (Micro Controller Unit) is for the tool head. This can be temperature of the boards, or a wiring thing. CarDoc likely knows better/more, but also look back over the latest forum posts in the meantime, simlar sounding issues have has popped up multiple times and those users have found a v…

I’m not sure if Sovol copy/pasted this issue to the Max (I bet they did) [image] MCU 'mcu' shutdown: Move queue overflow Sovol SV08 I’ve had my SV08 for about a month now and this issue keeps cropping up, and its cost me several KG’s of filament at this point. …

It seems the problem is solved by deleting gcode remainings. There was 210 MB free disk space only, probably not enough for proper functioning of Klipper.

I had this happen because I had very dense tree supports holding up a large bridge. I lowered the density by making the branches bigger.

No, it’s not solved: it appears even when all the gcode files are deleted except the last one (33.1 MB). Strange fact: in gcode folder there is 2.2 GB free disk space, but in its subfolder sda1 there is 6.5 GB free disk space. :thinking: How is this possible?? [image] [image]

See this thread [image] MCU 'mcu' shutdown: Move queue overflow Sovol SV08 I’ve had my SV08 for about a month now and this issue keeps cropping up, and its cost me several KG’s of filament at this point. Initially I thought I was just a problem with fuzzy skin …

MCU extra_mcu shutdown: Move queue overflow

Sovol SV08 MAX

cardoc February 2, 2026, 4:52pm 3

I’m not sure if Sovol copy/pasted this issue to the Max (I bet they did)

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MCU 'mcu' shutdown: Move queue overflow Sovol SV08	21	772	January 12, 2026
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MCU extra_mcu shutdown: Move queue overflow

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