Autodesk 057A1-05A111-1001 - AutoCAD LT 2009 Manual de usuario

January 2008

Getting Started

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Published by:

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111 Mclnnis Parkway

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Contents

Make the Transition from Paper to CAD . . . . . . . . . 1

Draw to Scale . . . . . . . . . . . . . . . . . . . . 3

Lay Out Your Drawing . . . . . . . . . . . . . . . . . 5

Organize Drawing Information . . . . . . . . . . . . . . 7

Establish Drafting Standards . . . . . . . . . . . . . . . 9

Draw Efficiently . . . . . . . . . . . . . . . . . . 11

Draw Accurately . . . . . . . . . . . . . . . . . . 13

View Your Drawing . . . . . . . . . . . . . . . . . 15

Create Dimensions and Text . . . . . . . . . . . . . . 17

Modify Your Drawing . . . . . . . . . . . . . . . . 19

Chapter 1 Introduction . . . . . . . . . . . . . . . . . 21

Why You Should Use this Guide . . . . . . . . . . . . . 22

Tutorials and Command Access . . . . . . . . . . . . . 22

Get Additional Information . . . . . . . . . . . . . . 23

Chapter 2 Work with Commands . . . . . . . . . . . . . . 29

Use the Mouse . . . . . . . . . . . . . . . . . . 30

Cancel a Command . . . . . . . . . . . . . . . . . 30

Start a Command . . . . . . . . . . . . . . . . . 30

Undo or Redo Commands . . . . . . . . . . . . . . . 34

Chapter 3 Change Views . . . . . . . . . . . . . . . . . 37

Zoom to Magnify a View . . . . . . . . . . . . . . . 38

Pan to Reposition a View . . . . . . . . . . . . . . . 39

Chapter 4 Drawing Setup . . . . . . . . . . . . . . . . . 43

Start a Drawing . . . . . . . . . . . . . . . . . . 44

Plan the Drawing Units and Scale . . . . . . . . . . . . 46

Understand Models and Layouts . . . . . . . . . . . . . 48

Organize Drawings with Layers . . . . . . . . . . . . . 50

Tutorial: Tour a Drawing . . . . . . . . . . . . . . . 52

iv |Contents

Chapter 5 Draw Objects . . . . . . . . . . . . . . . . . 55

Object Properties Overview . . . . . . . . . . . . . . . 56

Draw Lines . . . . . . . . . . . . . . . . . . . . 64

Draw Circles and Arcs . . . . . . . . . . . . . . . . 67

Chapter 6 Precision Drawing . . . . . . . . . . . . . . . . 71

Set Grid and Snap Values . . . . . . . . . . . . . . . 72

Draw with Coordinates . . . . . . . . . . . . . . . . 74

Snap to Precise Points on Objects . . . . . . . . . . . . . 76

Object Snap Descriptions . . . . . . . . . . . . . . . 78

Specify Angles and Distances . . . . . . . . . . . . . . 79

Chapter 7 Make Modifications . . . . . . . . . . . . . . . . 85

Select Objects to Edit . . . . . . . . . . . . . . . . . 86

Erase, Extend, and Trim Objects . . . . . . . . . . . . . 87

Duplicate Objects . . . . . . . . . . . . . . . . . . 90

Move and Rotate Objects . . . . . . . . . . . . . . . 93

Fillet Corners . . . . . . . . . . . . . . . . . . . 94

Use Editing Aids . . . . . . . . . . . . . . . . . .109

Analyze Drawings . . . . . . . . . . . . . . . . . .111

Chapter 8 Add Symbols and Hatches . . . . . . . . . . . . 115

Overview of Blocks . . . . . . . . . . . . . . . . .116

Insert Blocks . . . . . . . . . . . . . . . . . . .117

Overview of Hatches . . . . . . . . . . . . . . . . .119

Insert Hatches or Solid Fills . . . . . . . . . . . . . . .120

Chapter 9 Add Text to a Drawing . . . . . . . . . . . . . 125

Create and Modify Text . . . . . . . . . . . . . . . .126

Work with Text Styles . . . . . . . . . . . . . . . .128

Set Text Size for the Viewport Scaling. . . . . . . . . . . .129

Chapter 10 Add Dimensions. . . . . . . . . . . . . . . . 133

Dimensions Overview . . . . . . . . . . . . . . . .134

Create Dimensions . . . . . . . . . . . . . . . . .135

Use Dimensioning Options . . . . . . . . . . . . . . .138

Create and Modify Dimension Styles . . . . . . . . . . . .140

Modify Dimensions . . . . . . . . . . . . . . . . .142

Contents |v

Chapter 11 Create Layouts and Plots . . . . . . . . . . . . . 147

Work with Layouts . . . . . . . . . . . . . . . . . 148

Choose and Configure Plotters . . . . . . . . . . . . . 151

Plot from a Layout . . . . . . . . . . . . . . . . . 153

Glossary . . . . . . . . . . . . . . . . . . . 159

Index . . . . . . . . . . . . . . . . . . . . 169

Make the Transition from Paper to

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Draw to Scale |3

Draw to Scale

Drawing scale is something you consider when laying out your drawing. You establish scale

differently in CAD than you do with manual drafting.

With manual drafting, you

must determine the scale of a

view before you start

drawing. This scale compares

the size of the actual object to

the size of the model drawn

on paper.

With AutoCAD and

AutoCAD LT, you first decide

what units of measurement

you will use, and then draw

your model at 1:1 scale.

For example, when you draw a motor part, the

length of one unit might equal one millimeter

or one inch. When you draw a map, one unit

might equal one kilometer or one mile.

This drawing of a mechanical carriage uses

millimeters for the length of one unit. Views of

the part were scaled later to create the layout

for the printed drawing.

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