AutoCAD+Tutorial+002.pdf, Lecture notes of Control Systems

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AutoCad

Basic Tutorial

Launching AutoCad

1. Start

2. 3D and CAD

3. AutoCad

Pointing Device (Mouse)

AutoCAD uses either a mouse or digitizing tablet to select objects in a drawing.

Left Mouse Button

Used to pick or select objects

1. Click the left mouse button to select an object area in the drawing.
2. Press ESC twice to deselect an object (or to cancel a command).

Right Mouse Button

Used to enter a command, repeat last command, or access shortcut menus.

1. Click the right mouse button.

TIPS:

• SHIFT + the right mouse button brings up the object snap menus.
• Various screen locations for the mouse brings up different menus.• menus.

5.2 PAN

Shifts the location of a view.

1. Choose View, Pan.

or

2. Click the Pan icon.

or

3. Type PAN from the command prompt.

Command: PAN or P

TIPS:

• While in the PAN command, click with the right mouse button to see the following menu.
• Panning can also be done by using the window scroll bars

2.2 Creating a New Drawing

NEW Command

Creates a new drawing file.

1. Choose File, New. or
2. Press CTRL + N or
3. Click the New icon. or
4. Type NEW at the Command prompt. Command: NEW
5. Choose One of the options for creating a new drawing.
6. Click The OK button.
7. Save the drawing as another name.

TIP:

New drawings can also be created from Template Files.

1.11 Undo and Redo

Reverses the last action.

1. Choose Edit, Undo. or
2. Click the Undo icon. or
3. Press CTRL + Z.
4. Type U at the command prompt to undo the last command. Command: U

Redo

Reverses the effects of a single UNDO or U command.

1. Choose Edit, Redo. or
2. Click the Redo icon. or
3. Type REDO at the command prompt to redo the last undo command. Command: REDO TIPS: - UNDO has no effect on some commands and system variables, including those that open, close, or save a window or a drawing, display information, change the graphics display, regenerate the drawing, or export the drawing in a different format.

-REDO must immediately follow the U or UNDO command.

2.1 Open Existing Drawings

1. Choose File, OPEN. or
2. Press CTRL + O. or
3. Click the OPEN icon. or
4. Type OPEN at the command prompt. Command: OPEN
5. Press ENTER
6. Double Click the desired directory to find the drawing to open.
7. Click the drawing name to open.
8. Click The OK button.

TIP:

- Preview shows a bitmap image of the drawing selected. This image is the view that was last saved in the drawing. It will not show a preview of drawings saved before R13 AutoCAD.

Quick Save

The QSAVE command is equivalent to clicking Save on the File menu. If the drawing is named, AutoCAD saves the drawing using the file format specified on the Open and Save tab of the Options dialog box and does not request a file name. If the drawing is unnamed, AutoCAD displays the Save Drawing As dialog box (see SAVEAS) and saves the drawing with the file name and format you specify.

1. Press CTRL + S. or
2. Click the Save icon. or
3. Type QSAVE at the command prompt, Command: QSAVE

TIPS:

Drawings can be saved as different versions of AutoCAD (e.g. R13, R14, R 2000, etc.)

AutoSave settings under Tools, Options…

7.1 Running Object Snaps

An object snap mode specifies a snap point at an exact location on an object. OSNAP specifies running object snap modes, which remain active until you turn them off.

1. Choose Tools, Drafting Settings... or
2. Type DDOSNAP at the command prompt Command: DDOSNAP or
3. Click OSNAP on the Status Bar.
4. Right Click the Object Snap TAB.
5. Choose an object snap to turn ON/OFF from the dialog box.

AutoCAD 2D Tutorial

UNITS Command 8.

1. Choose Format, Units... or
2. Type DDUNITS at the command prompt. Command: DDUNITS or UN
3. Choose a units and angle setting.
4. Choose a precision setting.

AutoCAD 2D Tutorial

Pline Command 15.

A polyline is a connected sequence of line segments created as a single object. You can create straight line segments, arc segments, or a combination of the two.

1. Choose Draw, Polyline. or
2. Pick the Pline icon.
3. Type PLINE at the command prompt Command : PLINE or PL
4. Pick A point on the drawing to start the polyline From point:( select )
5. Type One of the following options Arc/Close/Halfwidth/Length/Undo/Width/:

or

6. Pick A point to continue drawing Arc/Close/Halfwidth/Length/Undo/Width/: ( pick point )

Polyline as one segment

3.4 Orthogonal Lines

Controls lines from being drawn at various angles to straight lines. When the snap grid is rotated, ortho mode rotates accordingly.

1. Press Function Key F. or
2. Double Click ORTHO from the Status Bar. oror 3.3. PressPress CTRL + L.CTRL + L.

Line drawn with ORTHO ON

Line drawn with ORTHO OFF

3.6 Circles

Circle Command

1. Choose Draw, Circle. or
2. Click the Circle icon. or
3. Type CIRCLE at the command prompt. Command: CIRCLE
4. Type One of the following options: 3P/2P/TTR/<>:

Circle, Center Radius

Circle, Center Diameter

Circle, Tangent, Tangent Radius

Circle, Tangent, Tangent, Tangent

or

5. Pick A center point.
6. Type A radius or diameter. or
7. Pick A radius or diameter Diameter/<>:

TIPS:

• To create circles that are the same size, press ENTER when asked for the circle radius.
• When selecting a circle with a pickbox, be sure to select the circumference of the circle.

3.7 Arc Command

1. Choose Draw, Arc. or
2. Click the Arc icon. or
3. Type ARC at the command prompt Command: ARC
4. Draw One of the arcs.

TIPS:

-Except for 3 point arcs, arcs are drawn in a COUNTERCLOCKWISE direction.

• While in the arc command, press the right mouse button to select the following options for arcs:

Arc Examples

3 point arc Start ,center, chord length

start, center, end Start, end, radius

Start , center, included angle Start, end, direction