My x1C is printing a long print and I noticed it randomly shut down. I had to power cycle it and asked to resume…
Is this normal? I assume no. Any way to determine what happened?
Hello.
No, this is definitively not normal. I suggest to contact the Bamboo Support on this.
Regards
Carsten
Do you have it on a UPS to protect it from power glitches?
I do have it on a UPS. I have a bento box fan plugged in too and that was running but the printer was off.
Thx yes I just uploaded the support ticket, so hopefully they’ll take a look and maybe I’ll get lucky that the log will tell them something
Check the rear AC plug in the back of the printer it is 100% in and even wiggle it to see if the power cuts out.
If that’s all good you can remove the back panel and check the power supply screws they have not loosened up any.
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The display shuts itself off. If the printer controller is hanging, that might result in the same apparent behavior - display dark and won’t wake up, printer stops printing. Do the lights inside the printer shut off, too?
The printer can’t shut itself off. The only way to do that is with the switch on the back. So if your printer is really powering off on its own, there’s something wrong with the power supply or AC connection to the wall.
Given you said “long print”, I’m going to guess the power supply is faulty. Once it’s been running long enough to get hot enough, it shuts itself off as a safety measure. Cools down by the time you cycle power and it restarts and runs normally again (for a while).
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This may be the issue. I sent a ticket to support, so hopefully they will address
I’d suggest connecting the printer directly to the AC power mains, bypassing your UPS and perform some tests.
Perhaps the UPS is causing an issue. Possibly it’s not supplying clean power (not sine wave), or it could have a problem with peak power, or it could be defective.
Okay I can try that but since it is a random event it may be hard to reproduce.
I do have the printer plugged into a WiFi plug into the UPS…so going directly to the wall will eliminate those variables, but it will stink to lose the WiFi power on/power-off capability
Yes the internal light was off too…if that makes a difference. This is why I felt it shutdown. So I pressed the button on my WiFi plug to get it to cycle on.
Check your amp rating on your WiFi plug some are only rated @ 10 amps max load.
Your house and UPS plugs are rated @ 15 amps.
I chrcked and it is 10amp and has overcurrent protection…
So you think that may be it? It isn’t happening atm on the prints I’m running but they haven’t been as long.
I can look for a 15amp one on Amazon if you think it’s a possibility
I have not personally checked the amp draw on the Bambu lab printer under full load @ 120 volts.
You also might want to look at the specs of your UPS to see how many watts it can handle if it is 1800 watts it would support a 15 amp load if your ac power source is 120 volts.
If this information posted on this link below is correct you can see it’s around a 9 amp at times if your voltage is @120 volts if your house voltage drops too much on the WiFi smart switch it can make the over current protection kick in and shut the power off to your printer.
Yes I would look for a 15 amp appliances smart switch it will have more over current room to work with with less fire risk.
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Thank you! I purchased a 15amp WiFi switch
My UPS 330watts …it is this one:
CyberPower CP550SLG Standby UPS System, 550VA/330W, 8 Outlets, Compact https://a.co/d/9uKFSDG
The ups has a 10 amp manual circuit breaker. I would only plug the printer and your small fan into it or you can overload it or trip the circuit breaker but this has not happened so we know you are not over the 10 amp spec.
The smart switches with the 10 amp rating and overcurrent protection circuits can be sensitive to voltage changes and loads.
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It’s not an AC power going away issue. You can confirm this for yourself. Turn the printer on and then unplug it and plug it back in. When you plug it back in, the printer will turn on immediately because the switch is still on. The OP’s printer turns off and stays off until he cycles power on the printer’s power switch. That’s not the AC power going away. That’s a circuit-breaker behavior.
WiFi controlled outlet - that could be shutting off due to overload. Easy to confirm. Remove the WiFi outlet from the circuit and plug the printer directly in to the wall. If it still shuts off, it wasn’t the WiFi outlet.
But I doubt it’s the outlet, either. If the outlet is overloaded and shuts off, the load goes away. If turning the printer on/off caused the WiFi outlet to “reset” (assuming it has some protection that’s tripping), the WiFi outlet should turn itself back on again as soon as it turns off. In both cases the load on the WiFi outlet is NIL, the outlet can’t tell if the printer is still present once its (theorized) circuit breaker trips. The described symptoms are not consistent with this being root cause.
I think it’s the printer’s power supply. But try running without the WiFi controlled outlet and see if that makes a difference. If it doesn’t, it’s the printer and not your AC that’s the issue. If it does, stop using the WiFi controlled outlet and reach around behind the printer to turn it on/off. 
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The way I read it is the op is talking about the manual on/off override switch on the smart switch not the printer power switch.
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I’m sorry, to be clear…when I said I power cycled it I meant I hit the button on the WiFi plug and it turned back on. I did not flip the power switch on the printer itself…So it seems conceivable to me that the WiFi switch was overloaded.
Also this happened once. It is not a common occurrence (yet)…. So I’m not sure how to test other than to run long petg prints and see if it happens again
Yes this is what I meant. I’m sorry if I wasn’t overly clear originally