In addition to regular, scheduled maintenance of a 3D printer, occasionally it may be necessary to perform some additional maintenance

If you are experiencing layer shifts; check all motors, belts, and pulleys are able to be moved freely and are not obstructed.

If the x, y, or z axis doesn't move easily and freely and the printer is sensing crashes you may add a small dot of lithium grease on the smooth rods, which will be incorporated into the bearings during use.

If the nozzle is clogged, you may need to clear the nozzle orifice with an acupuncture needle

Caution: A hot nozzle is a burn hazard, do not touch it with your hands.

Before, during, and after every print, check the condition of the fans and ensure they are not obstructed. The printer will not work if the fans are detected to be faulty.