Chapter 7 Computer-Aided Drafting and Design
175
a fi le is opened, you can select a specifi c view
from a list of views associated with the part or
assembly. In most cases, the fi rst view inserted
is the base view. This is often a principal
orthographic view, such as the front or top view.
Then, other views are projected from the base
view. Views that are projected from the base
view are placed in an orthographic alignment
by default and are constrained to the position
of the base view. See Figure 7-34.
In addition to orthographic views, other
types of views can be projected. For example,
section, auxiliary, detail, and isometric views
can be created using the appropriate tools.
custom templates for different drafting standards
or company practices. The drafting standard
specifi ed for the drawing fi le determines
the type of projection used for orthographic
views. Orthographic views can be projected
using third-angle projection or fi rst-angle
projection, as discussed in Chapter 9. Third-
angle projection is the preferred method in the
United States.
Once the appropriate layout format and
settings are established, drawing views can be
inserted into the drawing fi le. Most programs
require you to open the part or assembly fi le in
order to lay out the corresponding views. Once
D
C
B
A
B
C
D
1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1
E
F
E
F
SHEAVE
SHEET 1 OF 1
UNLESS OTHERWISE
SPECIFIED:
SCALE: 1:1 WEIGHT:
REV DWG. NO.
C
SIZE
TITLE:
NAME DATE
COMMENTS:
Q.A.
MFG APPR.
ENG APPR.
CHECKED
DRAWN
FINISH
MATERIAL
INTERPRET GEOMETRIC
TOLERANCING PER:
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL ±
ANGULAR: MACH ± BEND ±
TWO PLACE DECIMAL ±
THREE PLACE DECIMAL ±
APPLICATION
USED ON NEXT ASSY
A
DO NOT SCALE DRAWING
.25
R3.63
30°
6X 60°
Ø6.00
6X .50
A
.38
1.63
Ø1.75
Ø1.31
R.56
SECTION A-A
C
Ø3.00
Ø.75
6X R1.25
NOTES:
1. BREAK ALL SHARP EDGES.
.19
.38
.14
DETAIL C
SCALE 2 : 1
40°
Goodheart-Willcox Publisher
Figure 7-34. Drawing files are created by inserting drawing views into a layout. The drawing views are placed in an
orthographic alignment by default. After placing the base view, additional views can be projected. The views in this
drawing include two orthographic views (a front view and a top view), as well as a section view, detail view, and
isometric view (shown in color). The section view and isometric view were projected from the front view. The detail
view was projected from the section view. Dimensions and notes were added to complete the layout.
Copyright Goodheart-Willcox Co., Inc.