engineering 22 introduce to autocad

• ENGR-22_Lec-02_ACAD_Intro.ppt
1
Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer

Engineering 22
Introduction to
Introduction to
AutoCAD
AutoCAD
©
©
• ENGR-22_Lec-02_ACAD_Intro.ppt
2
Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
What are the “C”, “A”, and “D”?
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Elements of a CAD System
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE

Engineering 22 – Engineering Design Graphics
CAD Software
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Rm 1618 CAD Lab
Rm 1618 CAD Lab

Room 1618 Contains the Computers
and AutoCAD2006 Software


The CADLab Operates in OPEN
Fashion
•
ENGR22 Students can Use it AnyTime
it is Open
•
ENGR22 Students Do NOT have Priority
over other Users
–
except During ENGR22 Lab when ENGR22
Has Top Priority
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Rm 1618 CAD Lab
Rm 1618 CAD Lab
cont
cont

The “OnDuty” CADLab Supervisor Can
Assist with OPERATION of the Lab,
Computers or AutoCAD
•
e.g., He/She can show you how toTurn on
AutoCAD, print, etc.
•
He/She May NOT be able to help with
questions related to Course CONTENT


BMayer on OnDuty per Syllabus
•
CAN Assist with Course Content
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Starting AutoCAD
Starting AutoCAD

Turn on one of the
rm1618 Computers

DoubleClick the
AutoCAD Icon

Should Bring Up the
AutoCAD WorkSpace
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
AutoCAD WorkSpace
AutoCAD WorkSpace
Status LineCoOrd Display
Command Line
Cursor
Object
Properties TB
Standard TB

PullDown Menus
Drawing TB
Layer TB
Modify TB
Drawing
Area
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
AutoCAD ToolBars: Move/Size
AutoCAD ToolBars: Move/Size

ACAD ToolBars Can
Moved and Sized using
the Same Techniques as
with other MSWindows
Applications
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
ReSize CommandLine Box
ReSize CommandLine Box
Resize Using
Double-Bar Cursor
Recommend
Minimum 2-Lines
High
• ENGR-22_Lec-02_ACAD_Intro.ppt

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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
ToolBars Described
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”
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Start a NEW Drawing
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Select Template Dialog-Box
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
14
Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Name & Save 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 = \, /, %, *
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
AutoCAD Drawing Units
AutoCAD Drawing Units

“ACAD” Has Five
Unit-Systems
•
Each has Five
Formatting
Parameters


To Adjust the Unit
System Use the
PullDown Menu
•
Format → Units
• ENGR-22_Lec-02_ACAD_Intro.ppt
16
Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Format Units
Format Units
cont
cont

In ENGR22 We will
Typically Use for Angle
Units
•
Type → Decimal Degree
•
Precision → 0 or 0.0
•
CounterClockwise
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Standard Paper Sheet Sizes
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
19
Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Drawing Limits
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Drawing Limits
Drawing Limits
cont
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
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Grid & Snap
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

• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Grid & Snap
Grid & Snap

acadiso.dwt
•
Limits (420,297)

Grid set to 10 mm

Snap set to 20mm
• ENGR-22_Lec-02_ACAD_Intro.ppt
23
Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
Example → 1st Drawing
Example → 1st Drawing
1. Fire up AutoCAD
2. Make a new
Drawing using
acad.dwt
3. Save the File as
YourName-01.dwg
•
e.g.; BMayer-
01.dwg
4. Make a NEW

LAYER Called
“Object”
Click
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
1st Drawing
1st Drawing
cont
cont
•
Pick the GREEN Box
and then click OK
Type “Object”
Click
“Color →
white”
• ENGR-22_Lec-02_ACAD_Intro.ppt
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Bruce Mayer, PE
Engineering 22 – Engineering Design Graphics
1st Drawing
1st Drawing
cont
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