BSOD from microwave ovens and restarting on buildplate / USB placement
Recived my Core One L 2 days ago.
The prints are flawless and its a lot quieter than my Core one +. But I'm having a big issue and another annoying one.
I currently have the printer at work, and when ever people go for lunch break and starts the microwave ovens. The printer gets a BSOD and keeps having it as soon as it tries to restart while there are at least 2 ovens turned on. Very annoying since we have a mk3 and XL on the same grid with no issue. We have very stable power in Sweden and its a big sheetmetal factory, so its not like a microwave oven should have a major impact on the power grid.
The printer also isn't on the same circuit as the ovens. So this is very confusing.
Noticed a new issue today as well. When ever i place the buildplate on the heatbed or insert the usb, the printer restarts.
I mailed the crash dump to prusa yesterday, but no response yet.
Does anyone know what could be causing these issues? Loose connection?
RE: BSOD from microwave ovens and restarting on buildplate / USB placement
I am afraid Prusa may have gone over the top a bit in the Core One L, with a power analysis system that aims to be particularly clever but may not be quite mature yet. See the excerpt from the product announcement below. The monitoring seems to be thrown off by spikes or whatever other waveform deviations it believes to see on the power line. I have seen other posts where the Core One L did not work with UPS supplies.
Our power management is now significantly more intelligent. Instead of a simple binary check, it provides comprehensive power monitoring by analyzing the full voltage waveform in real-time. This allows the printer to automatically distinguish between 110V and 230V grids and intelligently configure the heatbed for consistent performance in any part of the world by hooking up the heating either in serial or parallel. This detailed analysis also enables the firmware to filter out minor grid fluctuations, virtually eliminating false power-loss triggers and boosting print reliability.
RE: BSOD from microwave ovens and restarting on buildplate / USB placement
Found the references I had seen earlier:
https://www.reddit.com/r/prusa3d/comments/1pksbg8/coreonel_on_ups
https://help.prusa3d.com/article/ac-controller-fault-35337-core-one-l_970042
For countermeasures, just the usual thoughts: Connect the Core One L to a different mains circuit, separate from the microwaves. Or try mains filters (with sufficient power rating) on the Core One L and/or the microwaves.
Maybe Prusa support has more specific guidance. But you might have to wait for a firmware fix to improve this behavior, if it is indeed firmware-based as hinted at in the announcement text.
RE:
This is most likely the issue and also explains the restart on USB insert and perhaps a discharge when placing the buildplate. Very dry and electrostatic air this time of the year here.
Guess I'll speed up my process of finding a spot for the printer at home. Its the only reason why its placed at my office at work atm. Would like to be able to start prints that are longer than 21 hours.
Don't think the employees will accept my "Can you please eat your food cold if you see the printer running".