Stratasys FDM 2000 Manual page 133

Reference
2-D Geometry
In CAD systems, 2-D geometry consists of points, lines, arcs, and other single
plane shapes. It is often used in drafting oriented applications. In Rapid
Prototyping, 2-D geometry consists of Polylines (a connected series of X-Y points)
all on the same Z-level.
2 1/2-Axis
A three-dimensional system in which at most, two axes may move at the same time.
Rapid Prototyping systems are 2 1/2 axis because all the geometry is created on
one Z-level, and then Z moves to the next positive Z-level.
3-D Geometry
In CAD, 3-D geometry may be surfaces, solids, or combinations. The STL file is 3-
D geometry derived from a surface or solid model, and expressed as facets.
ABS (See P400-ABS)
ASCII (American Standard Code for Information Interchange)
A standard method for defining alphanumeric data. ASCII data can be viewed or
modified by text editing applications such as Windows "Notepad."
Acceleration
The rate at which the head speed increases from Start Flow to Main Flow.
Air Gap
The horizontal space between material toolpaths.
Alternate Material
A solid plastic or wax that is extruded to create supports for a part. Also known
as release material or support material.
BASS (Break Away Support System)
The use of a second material for models requiring supports. The support material
is extruded from a different tip than the modeling material tip, and breaks away
from the model easily.
Backflow
Backflow is material that has backed out of the liquefier, become solidified, and no
longer flows into the liquefier.
Baud (bits per second)
A measure of the data transmission rate.
Bridging (sometimes "Air Bridging")
Bridging a space with material supported only at each end. Requires the cross-area
of the toolpath to be approximately equal to the cross-area of the tip I.D.
10MAY01
G-3
Glossary