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LCD Freeze Thermal run away bug
Open, Needs TriagePublic


While printing with .139 on the Quiver- similar to the bug in T8587- but this time the LCD froze when the printer was heating the bed to start a print.

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DaniAO created this task.Wed, Jul 10, 11:15 AM
DaniAO created this object with edit policy "LulzBot Hardware Products (Project)".

By any chance did this happen after a nozzle change?

@DaniAO: Please have everyone upgrade to .141 to make sure we are on the same page.

There are nozzle changes as the printer levels the bed.. so yes

Were you printing from USB or Cura?

I suspect it this particular failure may be related to T5686. This is an old bug, where we were occasionally seeing printers failing during probing.

Even though these bugs can be squashed, they will crop up from time to time. The biggest concern to me is that the watchdog timer is supposed to reboot the printer when the software locks up to prevent thermal runaway. T8587 is a different situation where the software was locking up due to a bug, but again the hardware watchdog timer failed and the printers that went into thermal runaway. It seems peculiar that certain printers are more likely to reboot (which is good), while others are more likely to freeze up (which is bad). This may be an issue we need to investigate more closely,

@DaniAO: Please load .142 on your printer and run the test I describe in T8630. Thanks.