Module: Computer Aid Design

Transcription

1 Module: Computer Aid Design Lesson 1: Introduction to AutoCAD 2010 & Drafting Commands 1. AUTOCAD OVERVIEW CAD= Computer Aided Design, (1982) 1.1 User Interface: 1.2 Info Center Page 1 of 14

2 1.3 Zoom 1.3 Thing You Should Know About AUTOCAD 1.4 Unit and Space All rights Reserved by Limkokwing University of Creative Technology Page 2 of 14

3 1.5 Creating a New File 1.6 Open a New File Page 3 of 14

4 1.7 Organizing File Make sure you are in the View tab on the Ribbon. There are several ways to organize the fi les by using the Windows panel. 2. Drafting Using AUTOCAD The Line Command Page 4 of 14

5 2.2 Drawing Line Using Dynamic Input All rights Reserved by Limkokwing University of Creative Technology Page 5 of 14

6 2.3 Precision: SNAP Right Click on one of the botton, then it will appear Select Setting 2.4 Precision: ORTHO Ortho is a tool that will force the cursor to always give us orthogonal angles (i.e., 0, 90, 180, and 270). Start the Line command. Specify the fi rst point. Move the mouse to the right, up, left, and down. Notice how it only gives you orthogonal angles. Use the desired angle, type in the distance, and press [Enter]. Page 6 of 14

7 Continue with other segments using the same method. Tip: You can also use Direct Distance Entry with Dynamic Input. 2.5 The Arc Command The Arc command is used to draw circular arcs (the arc part of a circle). Take a look at the following illustration: Make sure you are in the Home tab on the Ribbon, and, using the Draw panel, click the Arc button (the small arrow at the right). You will see the following: Exercise 1&2: Draw the Following: 1- Line from 1-8 Page 7 of 14

8 2- Arc 3- Save as yourname + exercise The circle command Make sure you are in the Home tab on the Ribbon, and, using the Draw panel, click the Circle button (the small arrow at the right). You will see the following: Excercsie 3: 1. Start AutoCAD Draw the five circles, which should look like the following: 3. Save as Yourname + Exercise 3 2.7PRECISION METHOD 3: OBJECT SNAP (OSNAP) Object Snap (OSNAP) is a tool that helps you utilize these records when you need to specify points on objects already precisely drawn without knowing the points. Page 8 of 14

9 Setting Object Snap Type OS and Enter/Space Tip: To turn object snap on/ off, press F3 2.8 Precision: Object Snap Tracking Page 9 of 14

10 Type 2 (or any distance) and press [Enter]: The center of the new circle will be specifi ed, then type in the radius. You will see the following: Tip: If you hover over a point for couple of seconds to produce the infinite line and then discover that it is not the desired point, simply go to the same point again, and hover over it for a couple of seconds to disable it. 2.8 The PLINE Command Pline means polyline and poly means many so, if you exchange many with poly, the new name would be many lines. To begin, let s compare the Line command and the Pline command. Page 10 of 14

11 Make sure you are in the Home tab on the Ribbon, and, using the Draw panel, click the Polyline button: The following prompt will appear: Specify start point: Current line-width is Specify next point or [Arc/Halfwidth/Length/Undo/Width]: After you specify the fi rst point, the Pline command will give you the current polyline width (in our example it is 0.90), then it will ask you to specify the next point. You can use all of the methods we learned in the Line command. If you do not want to specify the second point, you can choose from the following: Arc, Halfwidth, Length, and Width. Page 11 of 14

12 Exercise 4: Draw the Following Page 12 of 14

13 2.9 Polar Tracking On the Status Bar, click the Polar Tracking button The Erase Command Make sure you are in the Home tab on the Ribbon, and, using the Modify panel, click the Erase button. Page 13 of 14

14 Window Selection Crossing Selection 2.11 Undo and Redo Undo=[Ctrl] + Z. Redo=[Ctrl] + Y 2.12 REGEN COMMAND Notice the lines are smoother. Page 14 of 14