COMPUTER AIDED DESIGN CHAPTER 1 INTRODUCTION 1. 2 Course Information Instructor: MsC. Civil Engineer Şahin Çağlar TUNA E-mail: [email protected].

1

COMPUTER AIDED DESIGN

CHAPTER 1INTRODUCTION

2

Course Information

Instructor : MsC. Civil Engineer Şahin Çağlar TUNA E-mail : [email protected]

COMPUTER AIDED DESIGN

All lecture notes and related documents will be given during class!

3

Grading Policy

Assessment Tool Quantity PercentageClass Exercises 14 *Homework 7 10Quiz 5 10Midterm Exam 1 30Final Exam 1 50

Students are asked to prepare a given drawing using AutoCAD in class exercises, homeworks, quizzes and all exams.

4

Practice Hours (Class exercises)

Last two hours of the class are appointed to practice of the subjects covered during the first two hours.

The students will work on examples during the recitations to be equipped for preparing engineering drawings by computer means.

The students are expected to complete the exercises during the recitation period. Completion of the exercises is to be checked and this will add points to the overall grade of the student.

5

Attendance and General Rules

According to the university regulations, students must attend at least 70 % of the lecture hours.

Apart from the university regulations, it is of student’s benefit to attend all of the lecture and laboratory hours.

No cell-phone during class.

Do not be late for the class!

6

7

Why does an Engineer need to learn Engineering graphics?• Engineers need to be able to communicate their ideas through drawings and to be

able to “read” the drawings of others.• Engineering drawings are not art, but are technical presentations based on a well-

defined graphic language (containing rules, symbols, standards, etc.)• Even though most Engineering drawings are created using CAD, the person

creating the drawing must still know what rules to use. For example, a CAD program cannot determine the best view for showing a dimension or decide when to use visible lines or hidden lines.

• A knowledge of CAD is one of the earliest marketable skills that an Engineering student might possess. Many Engineering students gain valuable experience working with CAD.

• Many Engineers use CAD routinely.• Many Engineers will form sketches of drawings and then have CAD operators

produce the drawings. However, the sketches must be technically accurate. For example, it would be unreasonable to expect a CAD operator to know how you wish to layout, dimension, annotate, or section a drawing.

8

Drawings may be:• Freehand sketches• Mechanical drawings (a rapidly vanishing area)• Computer-Aided Drawings (CAD)

• Additionally, CAD drawings may be:– 2D Drawings– 3D Solid Modeling– 3D Parametric Solid Modeling (a more design-oriented approach)

Drafting standardsThere are precise rules for graphical communication. For example, a standard symbol is used to represent a counterbored hole. A key standard is the American National Standard Drafting Manual – Y14. An engineer needs to be familiar with drafting standards in order to communicate effectively. The textbooks used in this course will introduce the student to important drafting standards.

9

Lecture #1 EGR 110 – Engineering Graphics

SketchingSketching is perhaps better referred to as freehand drawing. Sketching used by Engineers does not normally refer to artistic renderings such as in creating a portrait.

Instead, sketching simply means freehand drawing without instruments.

Sketches should not be crude, sloppy, or unclear.

Sketches should:• Be clear• Be reasonably proportioned (often to scale using graph paper)• Use proper line widths and types• Follow drafting standards and conventions

Graphpaper is commonly used for sketching. A drawing is easily kept in proportion using graphpaper and is easily drawn to scale.

10

Slybus

11

12

Textbooks and Recommended Books

Alf Yarwood (2009), Introduction to AutoCAD 2010, 2D and 3D Design. Elsevier Inc.

Autodesk Official Training Guide (2009), Essentials, Learning AutoCAD 2010, Autodesk.

13

Default AutoCAD Interface

Application menu Quick acces toolbarInfo center

Title bar

Ribbons

Drawing areaCrosshair

Layout tabs Command window Status bar

Application status bar Drawing

status bar

14

15

16

17

18

19

Setting the Workspace

1- Search for information or help in the configured search locations by entering search keywords, or enter a question in the Help field.2- Search icon.3- Drop-down list to configure InfoCenter.4- Subscription Center.5- Icon to open Communication Center.6- access a list of favorites7- access the Help Dialog box

20

Setting the Workspace

21

Setting the Workspace

22

Setting the Workspace

Press F1 to open Help!

23

Working with Files

24

Working with Files

25

Working with Files

26

Pan and Zoom

27

Pan and Zoom

28

Pan and ZoomWheel Mouse Features

29