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PEI Print Surface
If the printed object still lifts off the print surface, clean the PEI surface with IPA/ Isopropyl
Alcohol and refresh the PEI surface with a wetsanding procedure. Use 2000-3000 grit
sandpaper with a flat sanding block (if available). Apply IPA to the bed and gently sand until
the solution is no longer clear and looks cloudy in appearance. Wipe your refreshed PEI surface
clean with a clean dry cloth or paper towel. Clean your PEI print surface again to remove any
remaining PEI particles. NOTE: Acetone will damage the PEI print surface.
Semi-Monthly
Hobbed Bolt
Filament is pulled through the extruder by a hobbed (or toothed) bolt. After repeated use, the
teeth of the hobbed bolt may become filled with plastic. Using the dental pick from the printer
kit, clean out the hobbed bolt teeth. If an extruder jam ever occurs, remove the plastic filament
from the extruder and clean out the hobbed bolt.
Smooth Rods
Wipe the smooth steel rods with a green scrub pad, clean cloth, or paper towel. The linear
bushings leave a solid lubricant that builds up over time. Squeaking noises while the printer is
in operation is likely a sign that the smooth rods need to be cleaned. NOTE: Never apply any
lubricant or cleaning agent to the smooth rods as the bushings are self-lubricating.
X-, Y-, and Z-axis Belts
Over long periods of time or after extensive relocating of the printer you evaluate the belt
tension on your 3D printer.
The belt on each axis can be tightened if necessary. Each end of the belt is clamped in place
with an M3 screw. This clamp can be loosened with the 2.5mm hex driver included with your
LulzBot Mini 2. Use the included needle nose pliers to gently pull the belt tight. Hold the belt
tight with one hand and tighten down the M3 screw to secure the belt.
Quarterly
Bed Leveling Washers
Keep the four metal bed leveling washers mounted on each corner of the print surface clean
and dust free by wiping them periodically with Isopropyl Alcohol (IPA), and/or a clean dry cloth.
If the bed leveling washers are not clean during the bed calibration process the print surface or
tool head may be damaged.
WARNING: Never attempt to clean the bed leveling washers during the probing sequence as it
may lead to personal injury.
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