Chapter1 drawinginautocad2010-151028112623-lva1-app6892

Copyright ©2009 by K. Plantenberg
Restricted use only
Chapter 1
Drawing in AutoCAD
Topics
Exercises

Restricted use only
Drawing AutoCAD: Topics
Summary
1.1) Introduction
1.2) AutoCAD’s User Interface
1.3) The Drawing Area
1.4) Accessing AutoCAD Commands
1.8) Coordinates
1.11) Printing
1.13) Draw Commands

Restricted use only
Drawing AutoCAD: Topics
1.14) Text
1.15) Modify Commands
1.16) Object Snap Commands
1.18) Selecting Objects
1.21) Polar Tracking
1.22) Object Snap Tracking
1.24) Dynamic Input
1.26) Grip Boxes
1.28) Parametric Drawing

Restricted use only
Drawing AutoCAD: Problems
Problem 1-1: Relative Coordinates
Problem 1-2: Scale

Restricted use only
Drawing in AutoCAD
Summary

Restricted use only
Summary
 What will we learn in Chapter 1?
→ How to navigate through and create
drawings in AutoCAD’s 2-D drawing
environment.
 Key points
→ AutoCAD creates objects within a
coordinate system.

Restricted use only
Drawing in AutoCAD
1.1) Introduction

Restricted use only
Introduction
 AutoCAD gives you the tools to create
accurate and professional looking detailed
and assembly drawings.

Restricted use only
Drawing in AutoCAD
1.2) AutoCAD’s Workspaces
and User Interface

Restricted use only
Workspaces
 AutoCAD Classic: Allows access to all
commands.
 2D Drafting & Annotation: Contains
commands related to 2D drawings.
 3D Modeling: Allows you easy access to
commands related to 3D models

Restricted use only
Workspaces
 Open up AutoCAD 2010 and enter the
AutoCAD Classic workspace.

Restricted use only
Workspaces
 Enter the 2D Drafting & Annotation
workspace.

Restricted use only
Drawing in AutoCAD
1.3) The Drawing Area

Restricted use only
The Drawing Area
 The drawing area is the place where you
create and view your drawing.
→ The background color may be changed.

Restricted use only
The Drawing Area
 Useful Commands
→ Limits: Sets the drawing size.
→ Units: Controls the measurement precision
(decimal places) and units (i.e. mm, inch) .
→ Pan: Moves the view center.
→ Zoom: Reveals more or less of the drawing
area.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.4) Accessing AutoCAD
Commands

Restricted use only
Accessing AutoCAD Commands
 2D Drafting & Annotation
→ Ribbon panels
 AutoCAD Classic
→ Pull-down menus
→ Toolbars
 Common to both
→ Command window
→ Shortcut menus
→ Drawing Status bar
→ Tool palettes
Live demonstration

Restricted use only
Starting a New Drawing
 QNew... STARTUP = 1 (Template
window)

Restricted use only
Starting a New Drawing
 QNew... STARTUP = 0 (Create New
Drawing window)

Restricted use only
Drawing in AutoCAD
1.8) Coordinates

Restricted use only
Cartesian & Polar Coordinates
 In AutoCAD, lines, circles and etc... are
defined by coordinate points.
 The two main coordinate systems used
are the
→ Cartesian coordinate system (x,y)
→ polar coordinate system (r,q).

Restricted use only
Cartesian Coordinate System
 The Cartesian coordinate has three
mutually perpendicular axes (x-axis, y-axis
z-axis).

Restricted use only
Cartesian Coordinate System
 The origin is located at (0,0,0).
Origin

Restricted use only
Creating a Line
 Command: l or line
 LINE Specify first point: 2,1

Restricted use only
Creating a Line
 Specify next point or [Undo]: 6,3
 Specify next point or [Undo]: Enter

Restricted use only
Polar Coordinate System
 The 2-D polar coordinate system consists
of two mutually perpendicular axes (x-axis,
y-axis).

Restricted use only
 The origin is located at (0,0).
Origin

Restricted use only
 The location of any point in space can be
identified by the radial coordinate r and
the angular coordinate q.

Restricted use only
 The angular coordinate q is measured
counterclockwise starting at the positive x-
axis.

Restricted use only
Creating a Line
 LINE Specify first point: 2.5<60

Restricted use only
Creating a Line
 Specify next point or [Undo]: 7<10

Restricted use only
Relative Coordinates
 If the start point of a line is unknown, you
can enter relative coordinate points to
create the end point.
→ The symbol @ is placed before the
coordinate point if it is to be relative to the
last point entered.

Restricted use only
Creating a Line
 LINE Specify first point: unknown

Restricted use only
Creating a Line
 Specify next point or [Undo]: @4,2

Restricted use only
Creating a Line
 Specify next point or [Undo]: @5<25

Restricted use only
WCS & UCS Coordinate Systems
 AutoCAD has two different coordinate
frames;
→ world coordinate system (WCS), which is
fixed and cannot be moved
→ user coordinate system (UCS), which may
be translated and rotated

Restricted use only
UCS Panel
 Command: UCS
 Specify origin of UCS or [Face/NAmed/
Object/Previous/View/World/X/Y/Z/ ZAxis]
<World>:
Origin World
Rotate

Restricted use only
Coordinate Position
 The coordinate position of your cursor is
displayed at the bottom left of the drawing
area.
 It dynamically states the x, y, z or r, q
position of your cursor.
→ The command COORDS controls which is
stated.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.11) Printing

Restricted use only
Printing
 To print, you need to specify a print
region.
→ Display: Prints everything that you can
see, at the moment, in the drawing area.
→ Extents: Prints the minimum area which
will include everything that is drawn.
→ Limits: Prints the area that you have
defined as your drawing size.
→ Window: Prints the area that you select
using a window.

Box indicating the limits.
This is what you see.

This is what prints.
DISPLAY

EXTENT

LIMITS

Restricted use only
Page Setup
 Printing preferences for a particular
drawing may be set in the Page Setup -
Model window.
→ These settings are drawing specific which
means that they are stored in the drawing or
template file and not in the program.

Restricted use only
Plot
 The Plot – Model window allows you to
send your drawing to a printer or plotter.
→ The default settings used to print your
drawing are specified in the Page Setup –
Model window.
→ The Plot – Model window allows you to
change some of these default settings.
• (Not stored in the drawing.)

Restricted use only
Printing to Scale
 Print scale expresses the ratio between
the printed size of an object to its actual
size.
→ Full-scale (1:1): 1 inch measures 1 inch
with a ruler on the printed drawing.
→ Half-scale (1:2): 1 inch measures ½ inch
with a ruler on the printed drawing.
→ Quarter-scale (1:4): 1 inch measures ¼
inch with a ruler on the printed drawing.

Restricted use only
Printing to Scale
 Even though a drawing may not be able to
be printed full scale, it should always be
drawn full scale in the CAD
environment.

Restricted use only
Printing to Scale
 Although it is nice to print to scale, the
ASME standard states that no dimension
should be measured directly from the
printed drawing.
 For drawings that have no scale, the word
“NONE” is used.

Restricted use only
Drawing in AutoCAD
1.13) Draw Commands

Restricted use only
Draw panel
Line
Polyline
Polygon
Rectangle
Arc
Ellipse
Circle
Hatch
Construction
Line

Restricted use only
Draw Commands
 Each draw command has several options.
→ Look at the Command prompt.
 Command: circle
 Specify center point for circle or [3P/2P/Ttr
(tan tan radius)]:

Restricted use only
Draw Commands
 Each draw command has several options.
→ Look at the Command prompt.
 Command: rectangle
 Specify first corner point or [Chamfer/
Elevation/Fillet/Thickness/Width]:
 Specify other corner point or [Area/
Dimensions/Rotation]:

Restricted use only
Drawing in AutoCAD
1.14) Text

Restricted use only
Style
 Command: Style
→ Sets the default text font and size.

Restricted use only
Single Line Text
 Command: Text
→ Creates a single line of text.
 It has several justification options.
→ Enter an option [Align/Fit/Center/Middle
/Right/TL/TC/TR/ ML/MC/MR/BL/BC/BR]:

Restricted use only
Multiline Text

Restricted use only
Multiline Text
 Command: MText
→ Activates an in place text editor.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.15) Modify Commands

Restricted use only
Modify Toolbar / Control panel
Erase
Copy
Move Rotate
Fillet/Chamfer
Explode

Restricted use only
Modify Toolbar
Mirror

Restricted use only
Modify Toolbar
Offset

Restricted use only
Modify Toolbar
Array

Restricted use only
Modify Toolbar
Rotate

Restricted use only
Modify Toolbar
Scale

Restricted use only
Modify Toolbar
Stretch

Restricted use only
Modify Toolbar
Trim

Restricted use only
Modify Toolbar
Extend (under Trim)

Restricted use only
Modify Toolbar
Break

Restricted use only
Drawing in AutoCAD
1.16) Object Snap Commands

Restricted use only
Object Snap Toolbar
 Osnaps allow you to snap to specific
geometric locations on an existing object.
→ They allow you to draw quickly and
accurately.
→ Snap points are indicated by Osnap
markers.
Live demonstration

Restricted use only
Object Snap Toolbar
Endpoint Midpoint Intersection
Center point
Quadrant
Tangent
Perpendicular
Parallel
Nearest
Settings

Restricted use only
Object Snap Toolbar
Extension

Restricted use only
Drawing in AutoCAD
1.18) Selecting Objects

Restricted use only
Selecting Objects
 Common ways of selecting objects
→ Selecting objects using the pickbox
→ Window selection
→ Crossing window selection (CW)

Restricted use only
Selecting Objects
 Useful Commands
→ Pickadd:
• PICKADD = 0 The object will replace the
selected object
• PICKADD = 1 The object will be added to the
selection group
→ Remove (R): Removes an object from the
selection group.
→ Add (A): Adds an object to the selection
group.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.21) Polar Tracking

Restricted use only
Polar Tracking
 Polar tracking restricts cursor movement
to specified angles. (POLARANG)
Live demonstration

Restricted use only
Drawing in AutoCAD
1.22) Object Snap Tracking

Restricted use only
Object Snap Tracking
 Object snap tracking enables you to
track along paths that are based on
OSNAP point.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.24) Dynamic Input

Restricted use only
Dynamic Input
 Dynamic input provides a command
interface near the cursor to help you keep
your focus in the drawing area.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.26) Grip Boxes

Restricted use only
Grip Boxes
 Object grips or grip boxes allow you to
quickly modify the object.
Live demonstration

Restricted use only
Drawing in AutoCAD
1.28) Parametric Drawing

Restricted use only
Parametric Panel
 The commands located in the Parametric
panel allow you to apply geometric and
dimensional constraints to 2D drawings

Restricted use only
Geometric Constraints
Coincident
Colinear
Concentric
Fix
Parallel
Tangent
VerticalEqual

Restricted use only
Geometric Constraints
Perpendicular
Horizontal
Smooth
Symmetric

Restricted use only
Dimensional Constraints
 The size of the element will
automatically change if the value of the
dimension is changed.

Restricted use only
 You have the ability to relate one
dimension to another through an
equation.

Restricted use only
Radius
Diameter
Angle

Restricted use only
Problem 1-1
Relative Coordinates

Restricted use only
Problem 1-1: Relative coordinates
 Fill in the relative Cartesian coordinates
needed to draw the following object.
How do we
draw this line?
@0,30

Restricted use only
@0,30
@40,0

Restricted use only
@0,30
@40,0
@0,-20

Restricted use only
@0,30
@40,0
@0,-20
@20,0

Restricted use only
@0,30
@40,0
@0,-20
@20,0
@0,-10

Restricted use only
@0,30
@40,0
@0,-20
@20,0
@0,-10
@-60,0

Restricted use only
 Fill in the relative Polar coordinates
How do we
draw this line?
@30<90

Restricted use only
@40<0
@30<90

Restricted use only
@40<0
@20<-90
@30<90

Restricted use only
@40<0
@20<0
@30<90
@20<-90

Restricted use only
@40<0
@20<0
@10<-90
@30<90
@20<-90

Restricted use only
@40<0
@20<0
@60<180
@30<90
@20<-90
@10<-90

Restricted use only
Problem 1-2
Scale

Restricted use only
Problem 1-2: Scale
 Using the ruler provided, determine the
scale that should be indicated on the
drawing for the following objects.
1:1

Restricted use only
Problem 1-2: Scale
1:2

Restricted use only
Problem 1-2: Scale
4:5

Chapter1 drawinginautocad2010-151028112623-lva1-app6892

Recommended

Recommended

More Related Content

Similar to Chapter1 drawinginautocad2010-151028112623-lva1-app6892

Similar to Chapter1 drawinginautocad2010-151028112623-lva1-app6892 (20)

Recently uploaded

Recently uploaded (20)

Chapter1 drawinginautocad2010-151028112623-lva1-app6892