Appendix B. Glossary

Active cooling fan
The fan that cools the MakerBot PLA Filament as it extrudes.
Build plate
The surface on which the MakerBot Replicator 2 makes an object.
Build platform
The support for the build plate. The build platform includes knobs for manual leveling.
Plunger
A part of the extruder assembly. The Delrin plunger pushes the MakerBot PLA Filament against the drive gear.
Drive gear
The gear that drives the MakerBot PLA Filament into the heater.
Extruder
Draws MakerBot PLA Filament from the spool and pushes it into the nozzle, where it is heated and squeezed onto the build plate.
Extruder fan
The fan that keeps the MakerBot Replicator 2 motor cool and disperses heat from the heat sink.
Fan guard
A grill that protects the extruder fan and protects the user from the fan.
Filament guide tube
A plastic tube that guides the MakerBot PLA Filament from the filament spool to the extruder.
GCode
A computer language used to describe the toolpath your MakerBot Replicator 2 will use to build an object. GCode is converted to S3G before being sent to your machine.
Heat sink
An active heat sink that dissipates heat from the cartridge heater. It looks like an aluminum plate with fins.
LCD control panel
The liquid- crystal display in the front lower right corner of the MakerBot Replicator 2. This control panel provides status information about the MakerBot Replicator 2 and includes control menus and diagnostics.
MakerBot PLA Filament
Polylactic acid filament. PLA is a renewable bioplastic. MakerBot PLA Filament is the source material from which you make objects on the MakerBot Replicator 2.
MakerBot Replicator 2
The MakerBot Replicator 2 Desktop 3D Printer.
MakerWare
Free software created by MakerBot that allows you to load 3D model files, manipulate, and edit those files, and send them to the MakerBot Replicator 2 for building.
Motor assembly
The stepper motor and the drive block that push filament into the extruder.
Motor wires
The bundle of electrical wires that provide power to the motor.
Nozzle
The opening on the end of the extruder from which heated MakerBot PLA Filament emerges to be spread onto the build plate.
Power supply
An A/C power supply for the MakerBot Replicator 2 that includes a block and two plugs.
Replicator G
Free, open source software that allows you to manipulate and edit .stl files and GCode files and send them to the MakerBot Replicator 2.
S3G
A compact format for describing the toolpath your MakerBot Replicator 2 will use to build an object.
SD Card
Secure Digital memory card that can store digital data and be read by the MakerBot Replicator 2.
Spacers
Plastic pieces that keep the extruder fan and heat sink secure and in place.
Spool holder
A part that attaches to the back of the MakerBot Replicator 2 and holds the spool of MakerBot PLA Filament. The spool holder ensures that the MakerBot PLA Filament is fed evenly to the MakerBot Replicator 2.
STL
A widely used file format for 3D models.
THING
A file format used by MakerWare that allows you to print multiple 3D models on the same plate.
Thingiverse
A website for uploading and downloading 3D model files for use with the MakerBot Replicator 2.
Threaded rod
A long rod that is threaded along its entire length. This rod allows the build platform to move up and down.
USB cable
A cable that allows the MakerBot Replicator 2 to communicate with a computer using the USB interface on the computer.
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