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Before You Begin
Read the chapter title and tell a classmate what you have experienced or already know about
the topic. Write a paragraph describing what you would like to learn about the topic. After
reading the chapter, share two things you have learned with the classmate.
Objectives
After studying this chapter, you should be
able to:
Explain how computer technology is
revolutionizing drafting, design, and
engineering.
Describe the basic features and
operation of a computer-aided
drafting program.
Explain the various commands used
to create objects in CAD.
Describe the tools used to modify
CAD drawings.
Identify the various display functions
used in CAD programs.
Describe the typical components in a
CAD program help system.
Explain the importance of CAD fi le
management and identify common
storage techniques.
List different types of CAD software
and their applications.
Describe the common tools and
processes used in parametric
modeling.
Drafting Vocabulary
absolute
coordinates
array
assembly
attributes
base feature
base view
bill of materials
blocks
Cartesian
coordinate system
chamfer
computer-aided
design/
computer-aided
manufacturing
(CAD/CAM)
coordinates
degrees of freedom
(DOF)
direct distance
entry
feature-based
modeling
fi llet
geometric constraint
grid
hatch pattern
layers
linetype
model dimensions
object snap
orthogonal mode
parameters
parametric
modeling
part
pixels
polar coordinates
raster objects
reference
dimensions
reference plane
relative coordinates
rendering
resolution
round
scanner
scene
schedule
sketch
snap
solid model
solid modeling
subassembly
surface model
surface modeling
symbol library
template
user coordinate
system
vector objects
world coordinate
system
Computer-Aided Computer-Aided
Drafting and Design Drafting and Design
CHAPTER CHAPTER
7
Copyright Goodheart-Willcox Co., Inc.
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