Notifications
Clear all

Random power failures - PSU failing?  

  RSS
Taylor V
(@taylor-v)
Member
Random power failures - PSU failing?

I just received my Core One+ a couple days ago. Did a few prints, 2 overnight and on the second overnight print, it shutoff and started beeping at about 8 hours in but would reboot and pick back up where it left off. It would maybe go for another 5 minutes before shutting off and beeping again, then picking back up after it rebooted. This ended up leaving a stringy mess since after each reboot. The filament would ooze out the extruder as it was heating back up because it wasn’t going through a clean cycle or anything. 

I am not getting any error codes. 

I turned it off overnight and this morning I re-seated the power panic cable. It printed two small 1 hour long prints. Then I went to print a larger print and it shutoff, beeped, rebooted, and started printing again. Would maybe make it a couple minutes before shutting off again. 

This seems like a power supply issue with regards to something tripping when a temps in the case have been elevated for longer periods. 

If anyone has any recommendations, please let me know. 

Posted : 23/12/2025 4:05 am
k1mu
 k1mu
(@k1mu)
Estimable Member
RE: Random power failures - PSU failing?

This sounds like the issue with a lack of grounding for the "X" and "Y" motors. See https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/core-one-crash-restart

Posted : 23/12/2025 2:16 pm
hyiger
(@hyiger)
Noble Member
RE:

Seems to me to be an issue with the PSU either that or your power is fluctuating. It appears to be tripping the power panic circuit. It could be something as simple as a bad power cable which happened to me when my printer was a MK4S. Try swapping it out. Otherwise, will need to get online with support.

Unless it was crashing during long diagonal prints (going from front-left corner to back-right corner) then it's not the grounding issue as mentioned above. 

This post was modified 6 hours ago by hyiger
Posted : 23/12/2025 3:52 pm
Share: