What is CAD?: Computer Aided Design (CAD) is simply, design and drafting (2D or 3D computer models) with the aid of a computer.
Example of an CAD software is AutoCAD.
What is AutoCAD?: AutoCAD is computer aided design software developed by Autodesk Inc. It was first introduced in 1982 as a desktop application and since 2021.
This software package use for drawing and designing almost anything such as mechanical engineering, civil engineering and architecture.
*Saving AutoCAD Work: User are responsible for the safe keeping of the work with AutoCAD. Get into the habit of creating a folder for each project.
When user save work, AutoCAD will create a *.dwg file and a *.bak file of the work. The *.bak file is a backup copy of the *.dwg file.
The AutoCAD Display Screen: Before start drawing user need to get familiar with the AutoCAD window. All of the areas described below. So it is important for user to understand each of them.
![](http://www.samasto.in/wp-content/uploads/2020/03/AutoCAD-Screen.jpg)
How to start AutoCAD?: Start Button => All Programmes => Autodesk => AutoCAD 2013 English => AutoCAD 2013 English.
Function keys: Turn ON / OFF the feature
F1 – Help
F2 – Flip Screen
F3 – Object Snap
F4 – Tablet
F5 – Isoplane
F6 – Coordinate Display
F7 – Grid
F8 – Ortho
F9 – Snap
F10 – Polar
F11 – O Tack
F12 – Dynamic Input
Special Key:
Esc – Cancel the command menu or dialog box.
Enter – End a command or repeat the previous command if the command line is blank.
Space – End a command or will repeat the command if the command line is blank when entering the text.
Full Form:
WCS – World Co-ordinate System
UCS – User Co-ordinate System
2D – Two Dimensional (X,Y)
3D – Three Dimensional (X,Y,Z)
Coordinate System
![](http://www.samasto.in/wp-content/uploads/2019/11/Coordinate-System-Length.jpg)
![](http://www.samasto.in/wp-content/uploads/2019/11/Coordinate-System-Angle.jpg)
Line (L): Line command is used to draw a line.
Example CAD001:
L <Enter>
@0,0 <Enter>
@5,0 <Enter>
<Enter>
![](http://www.samasto.in/wp-content/uploads/2020/03/CAD001-1024x776.png)
Exercise:
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-1.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-2.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-3.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-4.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-5.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-6.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-7.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-8.png)
![](http://www.samasto.in/wp-content/uploads/2019/11/Line-9.png)