INTRODUCTIONBasic Auto Cad

BASIC TOPICSHARDWAREMicroprocessor – Single chip plug into a circuit board. The complex procedure that transforms raw input data into useful information for output is called processing.Central Processing Unit (CPU) – Contains the intelligence of a machine.

Where calculations and decisions are made.Memory (RAM) – Random access memory, holds information only while the power is on. The more RAM the computer has the quicker it works and the more it can do. byte – unit measurement for computer memory 1kb = 1024 bytes ex. 64mb = 64x1024576

BASIC TOPICSHARDWARE

Input/output devices – input devices accept data and instructions from the user. Ex. Keyboard, mouse, and scanner. Output devices return processed data back to the user.

Storage – used to hold data that the computer isn’t using. ex. Hard disks, usb, cdr/w etc..

BASIC TOPICSSOFTWAREOperating Systems First step – Self-test 1. Identifying devices attached to it. 2. Counts the amount of memory available 3. Checks if the memory still functioning properly. Second step – searching for special program 1. Communicate with you 2. Use devices such as the disk drives, keyboard and monitor.

Note: 1. Apple/Macintosh have their own operating system. 2. AutoCAD 2005 not work with windows 98 or apple..

BASIC TOPICSSOFTWAREApplication Software – for the user design for specific task. Ex. Microsoft word – for typing

Business Application Software – Desktop publishing, spreadsheet programs, database software and graphics.

AutoCAD – is a “graphics” business application software.

Utility Application Software – helps you maintain your computer. Ex. Norton Utilities, Spywares etc..

Personal Application Software – designed for your personal needs such as address book, calendar etc.

Entertainment Application Software – Video games, puzzles, flight simulators and even educational programs.

WHAT IS CAD?Computer Aided Design (CAD) Design and drafting with the aid of a computer.Design – Creating a real product from a idea.Drafting – Production of the drawings that are used to document a design.

Traditional drafting - Repetitious and inaccurate. Faster to create simple “rough” sketch by hand but larger more complex drawings with repetitive operations are drawn more efficiently by using CAD.

Traditional drafting - Repetitious and inaccurate. Faster to create simple “rough” sketch by hand but larger more complex drawings with repetitive operations are drawn more efficiently by using CAD.

Start, Organize, and Save a Drawing Start a Drawing

You can start a new drawing several ways, including starting from scratch or using a template file. In each case, you can choose the units of measurement and other unit format conventions.

Open or Save a Drawing You can use several methods to find and open drawings,

even damaged drawings. You can save and backup drawings automatically.

Repair, Restore, or Recover Drawing Files If a drawing file is damaged or if your program terminates

unexpectedly, you can recover some or all of the data by using commands to find and correct errors, or by reverting to a backup file.

Maintain Standards in Drawings Drawings are easier to interpret if you set standards to

enforce consistency. You can set standards for layer names, dimension styles, and other elements; check drawings against these standards; and then change any properties that do not conform.

Start a Drawing

Start a Drawing from Scratch A quick way to begin a new drawing is to start

from scratch, which starts a drawing that uses settings from a default drawing template file.

Use a Wizard to Start a Drawing A setup wizard establishes basic drawing

settings step by step. Use a Template File to Start a Drawing A drawing template file contains standard

settings. Select one of the template files supplied, or create your own template files.

Start a Drawing

Specify Units and Unit Formats Before you start to draw, you decide on the

units of measurement to be used in the drawing, and set the format, precision, and other conventions to be used in coordinates and distances.

Add Identifying Information to Drawings You can keep track of your drawings more

easily if you add keywords or other information to them.

Insert Geographical Location Information in a Drawing

Start a Drawing from Scratch When no drawing template file is

specified in the Options dialog box, you can open the dialog box using one of the following methods:

Click Quick Access <Toolbar><New>. Enter new at the command prompt.

Click <Filemenu <New. At the command prompt, enter new.

Click <Qnew> on the Standard toolbar.

Start a Drawing from Scratch When you use Start from Scratch, you can specify

either imperial or metric units for the new drawing. The setting you select determines default values used for many system variables controlling text, dimensions, grid, snap, and the default linetype and hatch pattern file.

Imperial - Creates a new drawing based on the imperial measurement system. The drawing uses internal default values, and the default grid display boundary, called the gridlimits, is 12 x 9 inches.

Metric - Creates a new drawing based on the metric measurement system. The drawing uses internal default values, and the default grid display boundary is 420 x 290 millimeters.

Basic Auto Cad

AutoCad Screen

COMMAND LINESTATUS BAR

DRAWING AREA

MENU BAR

Specify Units and Unit FormatsDetermine the Units of Measurement Before you start to draw, you must decide what

one drawing unit represents based on what you plan to draw. You can convert a drawing between systems of measurement by scaling it.

Set Linear Unit Conventions Before you start to draw, you set the format and

the number of decimal places to be used when you enter and display linear units.

Set Angular Unit Conventions Angle conventions include the position of angle 0

and the direction of measurement: clockwise or counterclockwise. You also set the format and the number of decimal places.

Entering Commands

Enter Commands on the Command Line by Typing using the Keyboard or typing the Shortcuts

By pointing the Mouse point to specific Toolpalletes

Entering Command through the Menu Bar

Drawing Units Dialog Box Before you start to draw, you must decide

what one drawing unit represents based on what you plan to draw. You can convert a drawing between systems of measurement by scaling it.

Every object you create is measured in drawing units. Before you start to draw, you must decide what one drawing unit will represent based on what

you plan to draw. Then you create your drawing at actual size with that convention. For example, a distance of one drawing unit typically represents one millimeter, one centimeter, one inch, or one foot in real-world units.

Drawing Units Dialog Box