Presenting Ahmed Hassan Civil Engineer Introduction to Introduction to AutoCAD AutoCAD © ©
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Presenting Ahmed Hassan
Civil Engineer
Introduction toIntroduction to
AutoCADAutoCAD©©
What are the “C”, “A”, and “D”?
• CAD Stands for One of– Computer Aided Design
• The More Typical Definition– Computer Aided Drafting
• Sometimes See CADD or CAE– Computer Aided Drafting & Design
• Covers Both Bases– Computer Aided Engineering
• Typically CADD + Numerical-Analysis
Elements of a CAD System
• Computer; e.g., DeskTop PC• Input Devices; e.g., mouse, KeyBd• OutPut Devices; e.g., Plotter, Printer• Operating Software; e.g. WindowsXP, Mac
OSX, Unix, Linux• CAD/CAE Application Software
– e.g., AutoCAD, TurboCAD, ProE, SolidWorks, many others
CAD Software• Common Basic Elements
– Commands to generate geometry• Makes Mathematically Accurate Lines, Curves,
Surfaces, Volumes, etc.
– Functions for controlling views– Modifiers for changing drawing geometry– Annotation commands for adding text,
dimensions, and notes• The use of CAD has Revolutionized
Engineering Graphics
Starting AutoCAD
• DoubleClick the AutoCAD Icon
• Autocad 2007
Should Bring Up the AutoCAD WorkSpace
AutoCAD WorkSpace
Status LineCoOrd Display
Command Line
Cursor
ObjectProperties TB
Standard TB
PullDown Menus
Drawing TB
Layer TB
Modify TB
DrawingArea
AutoCAD ToolBars: Move/Size
ACAD ToolBars Can Moved and Sized using the Same Techniques as with other MSWindows Applications
ReSize CommandLine Box
Resize Using Double-Bar Cursor
Recommend Minimum 2-Lines High
ToolBars Described• AutoCAD ToolBars Behave in the Same Manner as
other Windows-Apps ToolBars
Each Icon is called a “Tool”
Allowing the Cursor to “Linger over a Tool Brings up a Descriptive “ToolTip”
Start a NEW Drawing• Start a New Drawing
by One of– PullDown Menus: File
→ New...
• Using the “QNew” (QuickNew) Tool
• Type “new” in the Command Line
Select Template Dialog-Box • Appears After the
New File Command(s)
• A Template is a Standard format
• For Now Suggest Using the acad.dwt Template
• Click Open to Start the New Drawing
Name & Save Drawing• Opening a NEW
Drawing Results in a Default Name of DrawingN.dwg
Use File → Save or The Save-Tool to Give the Dwg a new Name
Naming AutoCAD Files• NOT Case Sensitive• Any Combination of
Letters and Numbers– Also Allowed = $, -, _
• Not Allowed = \, /, %, *
AutoCAD Drawing Units
• “ACAD” Has Five Unit-Systems– Each has Five Formatting
Parameters
• To Adjust the Unit System Use the PullDown Menu– Format → Units...
Format Units• The Drawing Units
Dialog Box In ENGR22 We will
Typically Use for Length Units• Type → Decimal• Insertion Scale →
one of– Inches (in or “)– Millimeters (mm)
• Precision– in → 0.00 or 0.000– mm → 0 or 0.00
Format Units cont
• In ENGR22 We will Typically Use for Angle Units– Type → Decimal Degree– Precision → 0 or 0.0– CounterClockwise
Standard Paper Sheet Sizes• USA Standards (in)
– A = 8.5x11 (1.29 AR)– B = 11x17 (1.55 AR)– C = 17x22 (1.29 AR)– D = 22x34 (1.55 AR)– E = 34x44 (1.29 AR)
• Notes– Nice, Round No.s– Inconsistent Aspect
Ratios (ARs)
• ISO 216 Paper (mm)– A4 = 210x297 (1.41 AR)– A3 = 297x420 (1.41 AR)– A2 = 420x594 (1.41 AR)– A1 = 594x841 (1.41 AR)– A0 = 841x1189 (1.41 AR)
• Notes– UNround Numbers– Constant Aspect Ratio = 2
Drawing Limits
• In ENGR22 HardCopy Output will done on “A-size” (8.5” x 11”) Paper
• ACAD Drawing Limits set the Boundaries– The “Limits” Usually Set
to Match the Paper Size
• Example: Set Drawing Limits
1. Open a New Drawing using acad.dwt
2. Use the PullDown Menu: Format → Drawing Limits...
Drawing Limits cont
• Brings up notation in Command Line
3. Accept the Lower-Left at <0.0000, 0.000> by hitting Enter– Brings the Next
Query into the Command Line
4. Enter 11, 8.5 and hit Enter to set the Upper Right Limit
Grid & Snap• Grid is just a visual aid
for your drawing• Snap allows you to
specify precise coordinates when using the mouse
• They are modified with the GRID and SNAP commands
• Neither affect anything already drawn
• They can be changed on-the-fly
• Function keys set GRID and SNAP
• “modes”: on and off• F7 - Sets GRID mode
on/off• F9 - Sets SNAP mode
on/off
Grid & Snap
acadiso.dwt• Limits (420,297)
Grid set to 10 mm Snap set to 20mm
Example → 1st Drawing1. Fire up AutoCAD2. Make a new Drawing
using acad.dwt3. Save the File as
YourName-01.dwg– e.g.; BMayer-
01.dwg
4. Make a NEW LAYER Called “Object”
Click
1st Drawing cont
• Pick the GREEN Box and then click OK
Type “Object”
Click“Color →white”
1st Drawing cont
– Set the “Object” Layer to Current
Double click the “Status” box
• Set the “Object” Layer to Current using Status box
• Click OK
6. Use the drawing Tools to make some Shapes & Lines that Fill a significant Portion of the screen
5. Hit the Save tool
1st Drawing cont
Drawing ToolBar
Save Again
1st Drawing cont
7. Use the Pull Down Menu: Draw → Text → Multiline Test...
8. Drag the mouse to • form an “MTEXT” Box• Activates the
“Text Formatting” Box
9. In the Format Box Change the Text Size to 15-25• Or Whatever fits your dwg
1st Drawing cont
MTEXTBox
Change to 25
1st Drawing cont
10. Click in Inside the MTEXT Box and Type Your HW-ID– Fname Lname– Date– Class ID = ENGR22– HW ID = HW-nn
11.Click OutSide the MTEXT Box to DeActivate
12.Hit Save, yet again
1st Drawing cont
13. In the Command Line type zoom, then Hit Enter
14. At the Query Prompt the letter “e” (for “extents”) Then Hit Enter
Your Drawing will Zoom in to Fill the Screen
1st Drawing cont
zoom → extents
1st Drawing cont
15. Use the PullDown Menu: File → Plot – Activates the Plot
Dialog Box
1st Drawing cont
• ASK the CAD-Lab Supervisor about the PROPER Settings to Obtain an A-Size (8.5x11) PrintOut
16. In the Print Dialog Box click OK
17. Pick up your Copy and you’re done
All Done for Today
Thanks for Listening
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