4.5. HOBBED BOLT
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4.5 Hobbed Bolt
Filament is pulled through the extruder by a hobbed (or toothed) 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 by raising the head o the build plate, and heating
to extrusion temperature. Using a thick leather glove and a blue shop towel,
carefully wipe o the outside of the hot end. Never use a metal wire brush
on your hot end while powered as it can potentially short the control board.
4.8 Nozzle Wiping Pad
Over time the nozzle wiping pad will become lled with plastic residue.
The pad can be ipped over once and will need to be replaced when
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