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Power panic does nothing  

Power panic does nothing

I've had my mk3s for a few months now and in that time I've had maybe 5-6 power outages. None of the times did the printer raise the extruder. It just beeps and stops.

And if I'm not lucky enough for it to happen while the nozzle is in midair and not extruding the plastic, the filament drips out into a little blob essentially glueing the extruder to the printed part.  When the power comes back on, the extruder tries to move and two things can happen:

- it detaches the part from the heatbed, which is of course a total failure

- it detaches itself from the part but leaves the blob on the part which in some cases can also scrap the whole print.

Is this a normal behavior or is my printer somehow faulty?

Also, why is there no purge (nozzle wipe) after the power loss?

In  those rare cases when the print does not get ruined by power outage, it still can be ruined by starting the print with a dirty nozzle.



Posted : 27/06/2019 9:17 pm
Noble Member
RE: Power panic does nothing


It highly depends what kind of material you print and at which temperatures. If the printer requires a lot of power during the print then there is no real buffer to raise the nozzle. If you're using a textured sheet and the bed cools down after power outage, there is a high chance that the part will get loose. Doesn't matter what you're doing.

So if your prints resume the print then the power panic is working fine. Any other issues you have to fight separately. For couple minutes power outages I would highly recommend to use an UPS. 

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Posted : 27/06/2019 9:28 pm
Topic starter answered:
RE: Power panic does nothing

I've only printed in PLA and PETG, both with smooth and textured PEI. Yes, prints do pop off the textured sheet much easier, and of course I should not expect the power panic to just flawlessly resume every print.

It's just that I've not seen the printer raise the nozzle even once, so it got me thinking that maybe I did not assemble the kit correctly, or accidentally disabled something in the settings...

And yeah, thanks, I will definitely be getting an UPS for the printer.

Posted : 27/06/2019 9:38 pm