I’ve been running a very long print, ~20 hours, in PLA, and after a few computer related failures (a windows update and a crash) I had a successful print of the entire part, however there are three large skips in the y-axis of the print about 2/3rds of the way through. This print is from an SD card, so the skips can’t be due to a computer issue. I’m trying to figure out what the cause of these could be so I can fix it.
I’ve looked at the x and y belts, and the tension is identical and doesn’t appear to be too loose. I can’t see any rubbing of the belts on any parts of the printer, and the x and y motion is smooth when I push the bed and carriage by hand. The skips are 10, 4 and 8mm in the y direction, respectively, and at 3 and 2.5mm spacings in the z direction, and seem to occur at a single layer, not gradually.
Could this be an issue with motor drivers overheating, or an interrupted power supply? I can’t identify any mechanical issues that would be causing this, especially ones that would allow the print to continue after the print. Anyone have any similar issues?