My name Philip, I am new to the forum. I have been fighting the same issue as ChrisHenry for some time now.
Please, before anyone starts going on about home wiring; I have been electrician for over 25 years, from industrial, commercial, and residential; and after too many years of feast than famine; I now work as an Electronics/Electrical controls technician. My issue is not related to mains voltage.
I am searching for a resolution to the continued failed SD card prints, and the occasional walk-about from the axis, just as Chris has explained already.
I am still using the 12v setup. I have no need to go to 24v; it may be faster and more efficient, it's just a non-issue right now.
I did have a power supply fail; it was replaced; I have monitored the power supply during several prints; it does not waiver. I am beginning to feel like a controller failure is imminent, or this has to be firmware related???
Does anyone else have this issue? Let's work together and figure this out?