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PUSAT LATIHAN TEKNOLOGI TINGGI (ADTEC)

(JABATAN TENAGA RAKYAT)

KEMENTERIAN SUMBERMANUSIA

MALAYSIA

KERTAS PENERANGAN

KURSUS TEKNOLOGI KEJURUTERAAN PEMESINAN

TAHAP 3 (TIGA)

DUTI1.00 DRAW,READ AND INTERPRETE ENGINEERING DRAWING

AND DESIGN

TASK 1.01 Produce engineering drawing (using draughting software)

OBJEKTIF

PENCAPAIAN

PIAWAIAN

Produce engineering drawing (using draughting software) so that drawing

of part /component generated from computer is according to a specified

drawing standard.KOD ADTEC-TPS-1.01-P1 Muka 1 drp 9

Tajuk: INTRODUCTION TO AUTOCAD

Tujuan:

Kertas Penerangan ini akan menerangkan bagaimana kaedah yang digunakan dalam

sistem CAD untuk menghasilkan lukisan kejuruteraan yang dibuat menggunkan komputer.

Penerangan:

Starting AutoCAD

When you startAutoCAD, the initial screen displays :

The Menu Bar

The Status Bar

The Drawing Window

The Command Line

Four Tool bar

ADTEC

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Screen Layout :

TitleBar:

Displays the name of the program and the name of the currently loaded file in AutoCAD, the

name of the currently loaded drawing file.

The Drawing Window :

Only one drawing can be open at a time.

The Command line :

The facility to enter AutoCAD command and for AutoCAD to display prompts and other

information relating to commands in progress.

Menu Bar :

The pull down menu bar is also referred to as the menu bar.

Menu BarTitle Bar

DrawingWindowFour Tool Bar

Command Line

Status Bar

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Tool Bar :

Collection of buttons, each button has a label and an associated Help message.

Status Bar :

The default status bar displays the Snap mode, Ortho mode, Grid mode, Paper mode, Osnap

mode, Model mode, Tile mode and the coordinate display area.

Mouse : Pointing Devices

A Mouse on a personal computer usually has two or three buttons.

Button 1 : Pick or select button

Button 2 : Enter or return button

Button 3 : Osnap button

Function Keys

Key Function

F1 : displays for help command.

F2 : toggling the graphics window and command

window

with the text.F3 : running object snaps on or off

F5 : cycling through isometric planes

F6 : coordinate on or off

F7 : toggling Grid on or off

F8 : toggling Ortho on or off

F9 : toggling Snap on or off

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Start from Scratch

To begin drawing quickly using default English or metric settings .

Opening an Existing Drawing

1. Standard Toolbar:

2. From the File menu, choose Open.

3. In the Open Drawing As dialog box under File Name, enter a name for the drawing and

choose Open.

Saving a File

1. Standard Toolbar:

2. From the File menu, choose Save As.

3. In the Save Drawing As dialog box under File Name, enter a name for the drawing andchoose

Save.

The drawing extension (.dwg) is automatically appended to the file name.

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Setting Limits

Sets and controls the drawing boundaries and grid display.

Drawing limits also determine the area of the drawing that can display grid dots, the area

displayed by one of the scale options of ZOOM, and the minimum area displayed by ZOOM

All.

1. From the Format menu choose Drawing Limits

2. Command line: limits

ON / OFF / : Specify a point, enter on or off, or press ENTER

Upper right corner : Specify a point and press ENTER

Command: z

ZOOM

All/Center/Dynamic/Extents/Previous/Scale(X/XP)/Window/: A

Setting units

Sets or controls coordinate and angle display formats and precision.

1. From the Format menu: Units2. Command line: ddunits

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Dialog Box Options

Units - Displays and sets the current format for units of measure.

Precision - Sets and displays the precision for the current units format.

Angles - Displays and sets the current angle format.

Direction - Displays the Direction Control dialog box, which is used to controlthe

direction of angles. Counterclockwise or Clockwise.

Setting Grid and Snap

The two AutoCAD features Grid and Snap greatly facilitate ease and accuracy of drawing.

Grid

Displays a dot grid in the current viewport. The grid is used only for visual reference.

Snap

Restricts cursor movement to specified intervals.

To turn on Grid or Snap mode and set grid or snap spacing.

1. From the Tools menu, choose Drawing Aids.

2. In the Drawing Aids dialog box under Grid and Snap, select On.

3. Enter the horizontal grid or snap X Spacing in units.

4. To specify the same vertical grid or snap spacing, press ENTER. Otherwise, enter a new

distance under Y Spacing.

5. Choose OK.

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Ortho

Can be set on or off from within the Drawing Aids. When set ON, all entities drawn in

AutoCad will be forced to follow strictly orthogonal routes.

Coords

Command line: coords

New value for COORDS : 3

Type: Integer

Controls when coordinates are updated on the status line.

0 Coordinate display is updated as you specify points with the pointing device.

1 Display of absolute coordinates is continuously updated.

2 Display of absolute coordinates is continuously updated, and distance and angle from

last point are displayed when a distance or angle is requested.

Erase Command

Removes objects from a drawing

1. Modify Toolbar:

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2. From Modify menu: Erase

3. Command line: erase

Select objects: (Use an object selection method)

What If I Make a Mistake?

To undo the most recent action

1. Standard toolbar :

2. From the Edit menu, choose Undo

3. Command line U

Related Use OOPS to restore what you have just undone.

REDO

Reverses the effects of the previous UNDO or U command

REDO reverses the effects of a single UNDO or U command. REDO must immediately

follow the U or UNDO command.

1. Standard toolbar:

2. From the Edit menu: Redo

3. Command line: redo

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