4.5. HOBBED BOLT
4.5 Hobbed Bolt
Filament is pulled through the extruder by a hobbed bolt. After repeated
use, the teeth of the hobbed bolt can become lled with plastic. Using the
brush or pick from the printer kit, clean out the hobbed bolt teeth. If an
extruder jam ever occurs, remove the plastic lament from the extruder
and clean out the hobbed bolt.
4.6 Belts
Over long periods or after extensive relocating of the printer you may need
to re-tighten the belts on your 3D printer. For the X axis, using the 2.5mm
hex driver, loosen one of the belt clamps. The belts clamps are located on
the X axis carriage. To loosen the belt clamp, loosen the M3 screws on the
clamp. Using the needle nose pliers, pull the belt tight. While holding the
belt tight, tighten down the M3 screw. The Y axis belt can be tightened
using the same steps as the X axis using the belt clamps found on the
bottom of the Y axis plate. Make sure not to over tighten the belts as this
can cause unneeded stress on the printer.
4.7 Hot End
The hot end should be kept clean of extruded plastic by removing melted
plastic strands with tweezers. If melted plastic builds up on the hot end
nozzle you can clean it with a paper towel moistened with acetone or IPA.
Make sure the hot end is completely cool before attempting to wipe clean
the nozzle with acetone.
4.8 Electronics
The electronics case holding the RAMBo board may need dust blown out
occasionally. Power down the printer and use the provided 2.5-mm driver
to remove the four M3 screws securing the lid. The fan is mounted to the
lid and connected to the RAMBo board. Be careful with the fan cable
during removal. Once removed, use short bursts of compressed air to blow
out any dust. Plug in the lid fan, paying attention to polarity, and reattach
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