4
AutoCAD and Its Applications—Basics
Features
of
the
textbook
321
Modifying Objects
11 11
Learning Objectives
After comp co r mple ting g this h chapter, you will ill b be able bl t to:
✓ ✓ Use U the se t h e FILL FILL LET LE command d to draw dr aw fillets fi ll ets, rounds, r o und and a nd ot ot her h e r radi dii .
✓ Place chamffers and angled corners with the t CHAMFER command.
✓ ✓ Form F o rm a s a s pline n plin e using u s in the g t h e BLEND BL LEND command. c o mm a d nd
✓ Separate objects using the e BREAK command and combine objects usi in g the
JOIN command.
✓ Use the TRIM and EXTEND D commands to edit objects.
✓ Change objects using the STRETCH S and LENGTHEN commands.
✓ Edit the size of jects obj f using n g the SCALE command.
✓ Use the EXPLODE command.
AutoCAD includes many editing n n commands and options to complete common
drafting tasks, improve efficiency, and modify a drawing. This chapter explains
methods of using basic editing commands for changing or adding geometry to
existing objects. 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 tech-
nique, 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 Using the FILLET Command
Design and drafting terminology refers to a rounded interior corner as a fillet, fi t
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 nonin-
tersecting lines, circles, arcs, polylines, and splines. See Figure 11-1.
Setting the Fillet Ra adius
Access the FILLET command and then use the Radius option to specify the fillet
The radius determines the size of a f fillet and must be set before you select
AutoCAD stores the radius as the new default radius, allowing you to place
fillets of the f same size.. After you define the radius, select the first object and
hover the pick box over the second object to display a preview of the f operation.
FILLET
Ribbon
Home
Modify
Fillet
Type
FILLET
F
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.
Feat
u
res
o
f
t
h
e
text
b
oo
k
S e tt in g t h e F i ll et R di us
Ac c ess t h e FILLE T c o mm a n d a n d t h e n u
radius.. di u s Th e r a d i u s d e t er mi n e s t h e s i ze o f a
objectts. c s. A ut o C A D s t o r e s t h e r a d i u s a s t h e n e
addiitional d t i o n a l fi ll ets o f t h e s a m e s i ze A f te r y o u d e
then h o ve r t h e pi c k bo x o v e r t h e se c o nd obj e
Chapter 1
Introduction to AutoCAD
43
F
igure 1-21.
A—The dynamic
input fields that
appear after you
first enter the
RECTANGLEB—Press command.
the down arrow key
to display command
options. Pick an
option with the
cursor, or use the
up and down arrow
keys to highlight the
desired option and
press
[Enter]
to select.
Crosshairs Prompt Options are
available
availa
ble
Input area
Coordinate
Press the down arrow key on
the keyboard to display options
the ke
yboard
to di
splay
ursor or
Use th
e cur
own arrow
the up
and
dowoptions
ct
keys t
o
select
Command Lineline,
The command shown in
F
igure 1-20
, provides the same function as dynamic
input but uses a more traditional command input format. The command line also
allows you to display extensive command history. Depending on your working pref-
erence, disable dynamic input to use only the command line, use the command line
with dynamic input, or disable the command line to use only dynamic input.
Each default AutoCAD workspace includes the command line. By default, the
command line docks at the bottom of the AutoCAD window, above the status bar.
If dynamic input is on, and you want to type a command at the command line, pick
the command line input area to display a text cursor. If dynamic input is off, typing a
command automatically takes place in the command line.
NOTEdynamic
NO
NOT
OTE TE
Toggle input on and off by picking the
Dynamic Input
button
on the status bar or pressing
[F12]
. You can issue commands without
dynamic input or the command line on.
F
igure 1-22.
Dynamic input
fields change while
a command is in
use. In this example,
the coordinates
of the crosshairs
appear first. Once
you select the
first endpoint, the
distance and angle
of the crosshairs
relative to the
first endpoint are
displayed.
Current X location
of crosshairs
Current Y location
of crosshairs
Prompt
Crosshairs
Current
distance
from first
point
Selecting F
irst Point
Selecting Next Point
irst point
Fir
of line
Current angle°
from 0
fro
COMMANDLINE
Ribbon
Palettes
Command Line
Type
COMMANDLINE[Ctrl]+[9]
NEW
AutoCAD
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Learning Le Le ar ar ni ni ng ng Objectives O O b b je je ct ct iv iv es es
identify key items you will
l l le arn i in th h he ch h ha pter.
Command Co mm an d Entry En tr y y Graphics Gr ap p hi cs
show sh ow r r ibbon ib bo n,
Application Ap pl ic at io n
Menu, , , and keyboard y y entry y y
options.
Illustrations, including g
AutoCAD Au to CA D “screen s cr ee n shots,” sh ot s,
line art illustrations, and
illustrated il il lu lu st st ra ra te te d d tables, ta ta bl bl es es make ma ma ke ke
learning easy.
New Ne Ne w w Feature F F ea ea tu tu re re Graphics G G ra ra ph ph ic ic s s
identify new and updated
f f fe tures t at for f f A A A t t ut CAD C oC AD AD 2013 2 2 01 01 3 3.