All Users
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A level bed and build platform is crucial to good prints.
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First layer height is especially critical to success and the nozzle should just barely touch the build platform when at the z-home position.
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The filament spool should feed filament freely. Watch for tangles and other problems with the filament spool while printing.
PLA Users
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Shut-off extruder temp as soon as finished printing using Pronterface by clicking the off button. Leave printer plugged in to keep extruder fan rotating.
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Use blue painters tape for best adhesion on the build plate
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To lubricate the nozzle and prevent blockages, every filament change or start of a new roll put a few drops of canola oil into your hot-end.
ABS Users
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Spraying the build plate with hair spray (Aqua Net – Extra Super Hold) liberally before printing helps parts stick and helps prevent part warpage.
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Another option to help parts stick is to use Kapton tape on your build plate.