3.5. BELTS
3.5 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 binding and prevent full movement.
The Z axis belts used are continuous, and should not need tensioning.
If they do require tensioning, use your M5 driver to tighten the screw on
the top of your Z uppers.
3.6 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 as it can potentially lead to a short on the electronics
board.
3.7 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
both sides are covered in plastic. Replacement nozzle wiping pads are
available in our online store at http://LulzBot.com. Do not attempt to
use a plastic or polymer based wiping pad as it can melt, rather than
clean the nozzle. A metal wiping pad should never be used, as it
can cause a short on the electronics board. If the nozzle is not
clean, the bed-level calibration process will fail.
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