Engineering Fundamentals: An Introduction to Engineering, 4th ed.c

additional ways to create areas: (1) dragging a line along a path, (2) rotating a line about an axis,

(3) creating an area fillet, (4) skinning a set of lines, and (5) offsetting areas. With the area-fillet

operation, you can create a constant-radius fillet tangent to two other areas. You can generate

a smooth surface over a set of lines by using the skinning operation. Using the area offset

command, you can generate an area by offsetting an existing area. These operations are all

shown in Figure 16.22.

The created areas then may be put together to enclose and create a volume. As with

areas, you can also generate volumes by dragging or extruding an area along a line (path) or by

16.7 Solid Modeling 523

(a) A printed circuit board drill plan

3.20

2.400 .150

.150

B

2.60

1.400 2.300

QTY

16

4

3

SIZE

.040

.063

.125

REMARKS

PLATED THRU

PLATED THRU

LT R

NONE

A

B

(b) A wiring diagram

M1

R1

J

.50

B

B

A

A

A

A

1

2

3

91X 92X 93X 97X

S2

96X

95X

A1A1

94X

21

3

4

5

678

9

(^1211)
10

1

2

34 5 6 789

10

11

12

13

4XX

5XX

6XX

7XX

A

B

C

D

J2

0XX

3XX

5

4

3

2

1

23

4

PS1

J1 0XX E1

A B

C

8XX 98X

80X

XF1 S1

98X

8XX 

■Figure 16.20

Examples of drawings used in

electrical and electronic

engineering.

All dimensions

in inches

62080_16_ch16_p504-549.qxd 5/22/10 12:31 AM Page 523

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