Drawing
Problems
-
Chapter
1
Features
of
the
textbook
iv
AutoCAD and Its Applications—Basics
Copyright Goodheart-Willcox Co., Inc.
305
Copyright Goodheart-Willcox Co., Inc.
CHAPTER
Modifying Objects
fillet: A rounded
interior corner used
to relieve stress or
ease the contour of
inside corners.
round: A rounded
exterior corner used
to remove sharp
edges or ease the
contour of exterior
corners.
FILLET
Ribbon
Home
Modify
Fillet
Type
FILLET
ROUND
F
Learning Objectives
After completing this chapter, you will be able to:
✓ Use the FILLET command to draw fillets, rounds, and other radii.
✓ Place chamfers and angled corners with the CHAMFER command.
✓ Form a spline using the BLEND command.
✓ Separate objects using the BREAK command and combine objects using the JOIN
command.
✓ Use the TRIM and EXTEND commands to edit objects.
✓ Change objects using the STRETCH and LENGTHEN commands.
✓ Edit the size of objects using the SCALE command.
✓ Use the EXPLODE command.
AutoCAD includes many editing commands and options to complete common
drafting tasks, improve efficiency, and modify a drawing. This chapter explains
methods of using basic editing commands to change existing objects by changing or
adding geometry. The editing method used in this chapter is to access a command
such as STRETCH and then follow the prompts to complete the operation. Another
technique, presented in Chapter 13, is to select objects first using the crosshairs, then
access the editing command, and finally complete the operation.
Using the FILLET Command
Design and drafting terminology refers to a rounded interior corner as a fillet and
a rounded exterior corner as a round. AutoCAD refers to all rounded corners as fillets.
The FILLET command draws a rounded corner between intersecting or noninter-
secting lines, arcs, circles, ellipses, polylines, splines, xlines, and rays. See Figure 11-1.
Setting the Fillet Radiususa
Access the FILLET comman nd and then use the Radius option to specify the fillet
radius.. The radius determines the size of a fillet and must be set before you select
objectts. AutoCAD stores the radius as the new default, allowing you to place addi-
tional filllets of the same size.. Once you define the radius, select the first object and then
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Copyyright rig gh h t Goodheart-Willcox C o ., In c.
S e S tt in g t h e F ill et R di
A c c ess t h e FILLE T c o mm a d a n d t h e n u
r a d i u s Th e r a di u s d e t er m in e s t h e s i ze o f a
obje c s. Au to C A D s to r e s t h e r a d i u s a s t h e n
t i o n a l fil e ts o f t h e s a m e s i z e O n c e yo u d e fin e
515
Copyright Goodheart-Willcox Co., Inc.
F
igure 18-8. Dimensioning fillets
and rounds.
ALL FILLETS AND
ROUNDS R.125
Exercise 18-3
www.g-wlearning.com/CAD/
Complete the exercise on the companion website.When
Dimensioning Other
Curveswhen Dimension curves as arcs possible. an arc does not have a constant
radius, dimension to points along the curve using the
DIM
or
DIMLINEAR
command.
See
F
igure
18-9.
Adding Center D
ashe
s
a
nd Centerline
s
Centerlines are used to show and locate the centers of circular features and to
represent the axes of circular or symmetrical objects. Centerlines typically extend past
objects, as shown in
F
igure 18-10A
and
F
igure 18-10B
. ASME standards refer to a
two-segment cross that does not extend past objects as the center dashes of center-
lines. See
F
igure 18-10C
. Center dashes typically apply to circular objects that are too
small to receive centerlines. Center dashes are also common for rectangular coordinate
dimensioning without dimension lines, regardless of circular object size, as described
later in this chapter.
FDimensioning
igure 18-9.
curves that do not
have a constant
radius.
Chapter 18
Dimensioning Features and Alternate Practices
NEW
AutoCAD
Lear ning Objectives
identify key items you will
learn in the chapter.
New Feature Graphics
identify new and updated
features for AutoCAD 2017.
Command Entry
Graphics show ribbon,
Application
Menu, and
keyboard entry options.
Illustrations, including
line art illustrations,
AutoCAD “screen shots,”
and illustrated tables,
make learning easy.