LulzBot TAZ 4, User Manual

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Advanced Usage
as we have yet to see major advantages to using 1.75mm filament. If you
would still like to use 1.75mm filament make sure to follow the instructions
carefully. You will run the risk of damaging the printer if the instructions
are not followed correctly.
The TAZ 3D printer is set up to use 3mm plastic filament by default.
Although we recommend using 3mm filament, the TAZ is also capable of
printing 1.75mm filament. To print with 1.75mm filament you will need
to change the PTFE tube inside the Budaschnozzle hot end. Purchase the
1.75mm conversion PTFE tube in our store at
www.LulzBot.com
.
To change out the PTFE tube:
1. Remove the plastic filament from the extruder if there is any currently
loaded by bringing the hot end up to extrusion temp and backing out
the filament in Printrun
2. Using the Printrun manual controls, raise the Z axis to 100mm.
3. Turn off all power to the printer and allow the hot end to cool.
Disconnect the two 4-pin connectors on the extruder assembly. Locate
and remove, with the 2.5mm hex driver, the tool head 3mm screw in
top center of the X axis carriage. Remove the extruder mount from
the X axis carriage.
4. Using a 3mm hex driver loosen and remove the two 4mm screws from
the bottom of the extruder X axis carriage. This will allow you to
lift the extruder body and hot end off of the extruder mount. Set the
extruder body aside.
5. The hot end now has to be partially disassembled to replace the PTFE
tube for 1.75mm filament.
6. Using the 2.5mm hex driver, remove the three 3mm screws from the
bottom plate of the hot end. Remove the aluminum mount plate.
7. Note the path of the wires through the three strain relief slots in the
wooden top plate. Gently remove the wires from the strain relief slots.
Remove the top wooden plate.
8. With the top wooden plate removed the white PTFE tube should now
be visible. The PTFE tube is set through a number of aluminum and
PTFE washers. Remove the washers and PTFE tube from the hot
end.
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