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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 wet sanding procedure. Use 2000-3000 grit sandpa-
per with a flat sanding block (if available). Apply IPA to the bed and gently sand until the solu-
tion 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 remain-
ing PEI particles. NOTE: Acetone will damage the PEI print surface.
While almost all 3D printing filaments will adhere well to the PEI print surface, some materials
may need an application of a PVA glue solution/gluestick for improved print adhesion. These
materials include nylon- and polycarbonate-based filament.
Flexible materials such as Ninjaflex, SemiFlex, and some co-polyester-based filaments can
adhere too well and should be printed on the bare glass surface or on the PEI surface after a
PVA-based glue stick has been applied. NOTE: Printing flexible materials directly on an untreat-
ed PEI surface is not recommended as the flexible material may become permanently bonded
to the PEI print surface. If this occurs the PEI print surface will require replacement which may
not be covered under warranty.
Detailed PEI print adhesion troubleshooting information is available at LulzBot.com/PEI-trou-
bleshooting.
Detailed PEI print surface maintenance information is available at LulzBot.com/PEI-mainte-
nance.
Replacement beds and PEI sheets are available through LulzBot.com/store/parts.
Using 1.75mm filament
Your LulzBot Mini 3D printer is set up to use 3mm plastic filament by default and may be capa-
ble of printing 1.75mm filament with no hardware modification. While many of our advanced
users are able to do so, your results may vary. More information can be found at LulzBot.com/
using-1-75-filament.
For a more reliable and consistent use of 1.75 mm filament LulzBot users can purchase a 1.75
mm compatible Tool Head from the LulzBot store.
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