Search the Community

About 3 years ago, I built a Voron 2.4 300mm from scratch (Pi4B, SKR 1.4 MCU boards, Afterburner). Very pleased with it. Maybe someone has some insight on this. Every so often (very rare), A print will shift out of position (around 5 mm or so) after the first or second layer. Or, like what happened last night, the printer stopped right after printing the entire file, the print head positioned over the part at the very last position - the bed heater turned off, but the hot end still heated (not turned off) and not returned to a neutral position, etc. Also, Fluidd showed an error symbol for the print job (see image). I'm glad I stayed up last night to take the print out - if I hadn't, the print head would have been hovering over the last point in the print job with the hot end still heating (see why you shouldn't leave a 3D printer unattended?) Any clues as to what might cause this? Like I said these occurrences are extremely rare, but disturbing when they happen. It's not a physical problem with the printer - the shifting problem, for example, goes away when I reprint the same g-code file. It seems to be a hiccup in the system when it's printing. Bad memory spot on Pi SD card? I check the g-code file on the printer to see if it got chopped off somehow when importing to the Pi, but it was all there - it was not corrupted. Noise in the electronics, perhaps a micro interruption in power to the printer? A very brief interruption in power from the mains is to me the one that seems to be the most plausible. Perhaps a good reason to use a UPS with printers... Anyone with thoughts on this?