auto cad

AutoCAD

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AutoCAD

Definition of AutoCAD: CAD stands for Computer Aided Design. AutoCAD is an application software, used for

drafting, designing, mapping in both 2D and 3D. It is developed and sold by Autodesk. First released

in 1982.

Advantage of AutoCAD:

o Faster rate of producing drawing o Greater accuracy of drawings o Neater drawings o No repetition of drawings o Special drafting techniques o Quicker design calculations o Better drawing change procedure o Less development required o Integration of design with other disciplines

Interface: Interface is a means of communication between user and the computer.

Types of Interface:

There are two types of interface:

1. Command Line Interface. 2. Graphical User Interface (GUI).

Command Line Interface

Command Line Interface is a type of user interface in which you type commands instead of

choosing them from a menu or selecting an icon. For example DOS.

Graphical User Interface

Graphical User Interface is abbreviated as GUI. GUI is a type of user interface that allows the

users to interact with the computer with images, buttons or icons, rather than the text commands.

For example MS-Word’s interface.

Interface of AutoCAD

AutoCAD


The AutoCAD Screen

Window Terminology of AutoCAD:

1. Menu Bar 2. Standard Toolbar 3. Object Properties Toolbar 4. Draw and Modify Toolbars 5. Drawing Area 6. Crosshair 7. User Coordinate System (UCS) Icon 8. Model Tab/ Layout Tabs 9. Command Window 10. Status Bar

Standard Toolbar

Contains frequently used buttons such as Redraw, Undo, and Zoom, as well as Microsoft

Office standard buttons such as Open, Save, Print.

Object Properties Toolbar

Sets object properties such as color, linetype, and lineweight and manages layers

Draw and Modify Toolbars

Provide access to common draw and modify commands. The Draw and Modify toolbars are

displayed when you start AutoCAD.

Drawing Area/Graphic Window

window and on the number of other elements (such as toolbars and dialog boxes) that are

displayed. Drawing area displays drawings. The drawing area size varies, depending on the size of

the AutoCAD

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Crosshair

Identifies pick and drawing points within the drawing area. Use the crosshairs, which are

controlled by your pointing device, to locate points and select and draw objects.

User Coordinate System (UCS) Icon

Shows the orientation of the drawing Coordinate systems are based on X, Y, and (for 3D) Z

coordinates. AutoCAD has a fixed world coordinate system (WCS)

Model Tab/ Layout Tabs

Switch your drawing between model (drawing) space and paper (layout) space. You

generally create your designs in model space, and then create layouts to plot and print your drawing

in paper space.

Command Window

Displays prompts and messages. In AutoCAD, you start commands in one of three ways:

� Choose an item from a menu or a shortcut menu. � Click a button on a toolbar. � Enter the command on the command line.

Status Bar

Contains the default AutoCAD menus. Menus are defined by menu files that you can modify

or design on your own.

Command Window: It is a window in which you can type the commands through keyboard to perform any action. Some commands have the short keys. These short keys are known as ALIAS, alias are used to enter commands.

Cursor’s modes: As the command window aids you through messages, the cursor gives you clues about what

to do. Some cursor’s modes are:

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Selecting Objects: We can select an object by drawing a window around the required object. This window

allows you to define a rectangle using two points. Once the window is defined, all objects which lie

entirely within the window will be selected.

Types of Selection Window:There are two types of selection window in AutoCAD.

1. Standard Window or Standard Selection2. Crossing Window Or Crossing Selection

Standard Window or Standard Selection:

When we will select an object from left to right then we have to select our required object

as a whole, this window will be the

Selection.

Here overlapping or intersecting objects (within the window)

Crossing Window Or Crossing Selection:

When we will select an object from right to left then all overlapping or intersecting objects

(within the window) will be selected, this window is known as

known as Crossing Selection.

Status Bar: The status bar displays the coordinate values of your cursor, drawing tools, navigation tools,

and tools for Quick View.

Elements of Status Bar:

� Snap � OSnap � Grid � Polar � Ortho � OTrack

Control Commands: The commands which are used to control the drawing and drawing area.

Operational Commands:The commands which are used for the drawing related operations.

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We can select an object by drawing a window around the required object. This window


entirely within the window will be selected.

Selection Window: There are two types of selection window in AutoCAD.

Standard Window or Standard Selection Crossing Window Or Crossing Selection

Standard Window or Standard Selection:


as a whole, this window will be the Standard Window and this selection is known as

Here overlapping or intersecting objects (within the window) will not be selected.

Crossing Window Or Crossing Selection:


(within the window) will be selected, this window is known as Crossing Window

The status bar displays the coordinate values of your cursor, drawing tools, navigation tools,

Elements of Status Bar:

which are used to control the drawing and drawing area.

Operational Commands: The commands which are used for the drawing related operations.

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We can select an object by drawing a window around the required object. This window



and this selection is known as Standard

will not be selected.


and this selection is

The status bar displays the coordinate values of your cursor, drawing tools, navigation tools,

which are used to control the drawing and drawing area.

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Sheet setting: These are the steps of sheet setting.

• Set the UNITS (UN).• Set the LIMITS (LIMITS).• On the GRID (F7).

Help: “F1” is the short cut key for the Help.

Ortho: This mode allows us to draw straight lines that can be vertical

and horizontal.

Polar: This mode allows us to draw a straight line, and as well as we

can draw a straight line at any angle

Grid: The pattern of dots in the form of rows and columns on the drawing area is known as Grid.

cut key for grid is “F7”.

Snap: Snap mode restricts the movement of the crosshairs to intervals that you define.

for snap is “F9”.

Limits: The limits of the grid are controlled by the Limits command.

Osnap: OSnap controls running object snap settings. With running object snap settings (also called

Osnap), you can specify a snap point at an exact location on an object.

“F3”.

LWT: This button is for “Line Weight”. This is used for showing the line weight.

Grip Grips are handles that allow you to manipulate the object.

Grips types

• Warm • Hot • Cold

Warm Grip

When an entity is selected, the grip

blocks appear. These are the ‘blue squares'

that get highlighted when you select an

object.

Hot Grip

Any grip on any object may be

selected again to become the 'Hot' grip.

Hot grip becomes the object's base point.

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These are the steps of sheet setting.

Set the UNITS (UN). Set the LIMITS (LIMITS).

the GRID (F7).

“F1” is the short cut key for the Help.

This mode allows us to draw straight lines that can be vertical

This mode allows us to draw a straight line, and as well as we

can draw a straight line at any angle too. Short cut key for polar is “F10”.

The pattern of dots in the form of rows and columns on the drawing area is known as Grid.

Snap mode restricts the movement of the crosshairs to intervals that you define.

The limits of the grid are controlled by the Limits command. Command for limits is “LIMITS”.

OSnap controls running object snap settings. With running object snap settings (also called

a snap point at an exact location on an object. Short cut key of Osnap is

This button is for “Line Weight”. This is used for showing the line weight.

Grips are handles that allow you to manipulate the object.

When an entity is selected, the grip

These are the ‘blue squares'

that get highlighted when you select an

Any grip on any object may be

selected again to become the 'Hot' grip.

base point.

Warm Grip

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The pattern of dots in the form of rows and columns on the drawing area is known as Grid. Short

Snap mode restricts the movement of the crosshairs to intervals that you define. Short cut key

Command for limits is “LIMITS”.

OSnap controls running object snap settings. With running object snap settings (also called

Short cut key of Osnap is

This button is for “Line Weight”. This is used for showing the line weight.

Ortho

Warm Grip

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Cold Grip

To activate a GRIP just select one of

the blue GRIP boxes (cold GRIP).

Drawing Tool Bar

Elements of Drawing Tool Bar

• Line • Construction Line • Polyline • Polygon • Rectangle

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To activate a GRIP just select one of

he blue GRIP boxes (cold GRIP).

Elements of Drawing Tool Bar

Hot Grip

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• Arc • Circle • Revcloud • SPLine • Ellipse

Line: Line objects have two points.

point to another. When you pick

second point you will see a rubber band line

when the second point is picked.

Construction Line: The Construction Line command creates a line of infinite length which passes through

two picked points. Short key for Construction line

Polyline: The Polyline or Pline command is similar to the line command except that the resulting

object may be composed of a number of segments which form a single

for polyline is “PL”.

Polygon: An object that have the sa

any area in it, is known as polygon.

Rectangle: The Rectangle command is used to draw a rectangle whose sides are vertical and

horizontal. The position and size of the rectangle are defined by pick

corners. Short-cut key for rectangle is “REC”.

Arc: The Arc command allows you to draw an arc or a curve or a circular line. There are

numerous ways to define an arc, the default method uses three pick points, a start point, a

second point and an end point. Short

Circle: The Circle command is used to draw circles. There are a number of ways you can

define the circle. The short-cut key for the circle is “C”.

Revcloud: The Revcloud command is used to draw a

any closed shape into a revision cloud.

Spline: A spline is a smooth curve that is fitted along a number of control points.

key for spline is “SPL”.

Ellipse: The short-key for ellipse is “EL”.

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have two points. With the Line command you can draw a simple line from one

pick the first point and move the cross-hairs to the location of the

rubber band line which shows you where the line will be drawn

when the second point is picked. Short key for line tool is “L”.

The Construction Line command creates a line of infinite length which passes through

Short key for Construction line is “XL”.

The Polyline or Pline command is similar to the line command except that the resulting

object may be composed of a number of segments which form a single object. Short

An object that have the same starting and ending point and that object can contain

any area in it, is known as polygon.

The Rectangle command is used to draw a rectangle whose sides are vertical and

horizontal. The position and size of the rectangle are defined by picking two diagonal

cut key for rectangle is “REC”.

The Arc command allows you to draw an arc or a curve or a circular line. There are


Short-cut key for rectangle is “A”.

The Circle command is used to draw circles. There are a number of ways you can

cut key for the circle is “C”.

The Revcloud command is used to draw a "freehand" revision cloud or to convert

any closed shape into a revision cloud.

A spline is a smooth curve that is fitted along a number of control points. The short

key for ellipse is “EL”.

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With the Line command you can draw a simple line from one

to the location of the

you where the line will be drawn

The Construction Line command creates a line of infinite length which passes through

The Polyline or Pline command is similar to the line command except that the resulting

Short-cut key

me starting and ending point and that object can contain

The Rectangle command is used to draw a rectangle whose sides are vertical and

ing two diagonal

The Arc command allows you to draw an arc or a curve or a circular line. There are


The Circle command is used to draw circles. There are a number of ways you can

"freehand" revision cloud or to convert

The short-cut

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Hatch: “Hatch” is used to add shaded patterns in an objects. We use it to

assigning a design to an object. Hatch patterns can be used to indicate a

material to be used, such as a sand hatch.

Gradient: To assign shade in an object, we use Gradient. Alias for Gradient is “GD”.

Coordinate System: A coordinate system is a system, which uses one or more numbers to uniquely determine

the position of a point or any other geometrical element.

Types of coordinate system:

• Cartesian coordinate system • Polar Coordinate System • Absolute Coordinate System • Relative Coordinate System

Cartesian coordinate system:

A system in which the location of a point is given by coordinates that represent its distances

from perpendicular lines that intersect at a point called the origin. A Cartesian coordinate system in

a plane has two perpendicular lines (the x-axis and y-axis), in three-dimensional space, it has three

(the x-axis, y-axis, and z-axis).

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Polar Coordinate SystemThe polar coordinate system is a system

in which each point on a plane is

determined by a distance from a fixed

point and an angle from a fixed direction.

Absolute & Relative

coordinate system: Both Cartesian and polar co

ordinates come in two flavours,

and relative. The distinction is quite

simple, absolute co-ordinates relate to

the X and Y axes and the origin of the

current co-ordinate system, whilst relative co

are specifying co-ordinates you need to tell AutoCAD which type you want. Absolute co

are typed exactly as in the examples above. To specify a relative co

"at" symbol as a prefix. In the case of the two examples above a relative Cartesian co

like this @34.897,45.473 and a relative polar co

Use of “@” sign: The @ symbol can be used to input the "last point" in response to any prompt that requests

a point value. When combined with a Cartesian or polar coordinate, the

value relative (measured from) the "last point".

Example of absolute & rCommand: LINE

From point: 30,40 (an absolute Cartesian co

To point: @0,12 (a relative Cartesian co

To point: @12<0 (a relative polar co

To point: @0,-12 (another relative Cartesian co

To point: C (to close)

Assignment:

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Polar Coordinate System: The polar coordinate system is a system

in which each point on a plane is

determined by a distance from a fixed

point and an angle from a fixed direction.

Both Cartesian and polar co-

ordinates come in two flavours, absolute

and relative. The distinction is quite

ordinates relate to

the X and Y axes and the origin of the

ordinate system, whilst relative co-ordinates relate to the current pick point. When you

ou need to tell AutoCAD which type you want. Absolute co

are typed exactly as in the examples above. To specify a relative co-ordinate you need to use the

"at" symbol as a prefix. In the case of the two examples above a relative Cartesian co

and a relative polar co-ordinate looks like this @34.897<30

symbol can be used to input the "last point" in response to any prompt that requests

a point value. When combined with a Cartesian or polar coordinate, the @ symbol produces a point

value relative (measured from) the "last point".

Example of absolute & relative coordinate system:

From point: 30,40 (an absolute Cartesian co-ordinate)

To point: @0,12 (a relative Cartesian co-ordinate)

To point: @12<0 (a relative polar co-ordinate)

12 (another relative Cartesian co-ordinate)

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ordinates relate to the current pick point. When you

ou need to tell AutoCAD which type you want. Absolute co-ordinates

ordinate you need to use the

"at" symbol as a prefix. In the case of the two examples above a relative Cartesian co-ordinate looks

@34.897<30

symbol can be used to input the "last point" in response to any prompt that requests

symbol produces a point

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Different modes of entering data� Interactive Entry Method

� Direct Distance Entry

� Grid Snap Entry

� Polar Snap Entry

Interactive Entry MethodWhen we use only mouse, to enter the starting and ending point of an object.

Direct Distance Entry: Direct distance entry enables you to draw an object, such as a line, by pointing in a particular

direction with the cursor and entering a distance at the command line.

Direct Distance Entry Method

Grid Snap Entry It is a method in which we enter a point with the help of grid and snap.

Polar Snap Entry: It is a method in which we enter a point with the help of polar, where we can define the

angle of object.

Tools of Modify Toolbar

• Erase • Copy • Mirror • Offset • Array • Move • Rotate • Trim • Scale • Stretch • Chamfer • Fillet • Lengthen • Extend

Erase: This command erases (deletes) any selected object(s) from the drawing.

erase is “E”.

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Different modes of entering data: Interactive Entry Method

Interactive Entry Method: When we use only mouse, to enter the starting and ending point of an object.

Direct distance entry enables you to draw an object, such as a line, by pointing in a particular

direction with the cursor and entering a distance at the command line.

Direct Distance Entry Method

which we enter a point with the help of grid and snap.

It is a method in which we enter a point with the help of polar, where we can define the

Tools of Modify Toolbar:

This command erases (deletes) any selected object(s) from the drawing. Short

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When we use only mouse, to enter the starting and ending point of an object.

Direct distance entry enables you to draw an object, such as a line, by pointing in a particular

It is a method in which we enter a point with the help of polar, where we can define the

Short-cut of

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Copy: The Copy command can be used to create one or more duplicates of any drawing object

or objects. Short-cut key of copy is “CO” or “CP”.

Mirror: The Mirror command allows you to mirror selected objects in your drawing by

picking them and then defining the position of an imaginary mirror line using two points.

Short-cut key of mirror is “MI”.

Offset: The Offset command creates a new object parallel to or concentric with a

selected object . Short-cut key of offset is ”O”.

Move: The Move command works in a similar way to the copy command except that

no copy is made, the selected object(s) is simply moved from one location to another.

Short-cut key of move is “M”.

Rotate: The rotate command allows an object or objects to be rotated about a point

selected by the user. Short-cut key of rotate is “RO”.

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Trim: The Trim command can be used to trim a part of an object. In order to trim an

object you must draw a second object which forms the "cutting edge". Cutting edges can be

lines, polylines, circles, arcs or ellipses. Alias of trim is “TR”.

Scale: The Scale command can be used to change the size of an object or group of objects.

Short-cut key of scale is “SC”. For adjusting scale, we have a formula.

Scale= Required dimension/Existing dimension

Stretch: The Stretch command can be used to move one or more vertices of an object while

leaving the rest of the object unchanged. Short-cut key of stretch is “S”.

Lengthen: The Lengthen command can be used to either lengthen or shorten Lines, Arcs, open

Polylines, elliptical Arcs and open Splines without the use of cutting or boundary edges.

Short-cut key of lengthen is “LEN”.

Extend: This command extends a line, polyline or arc to meet another drawing object (known

as the boundary edge). Short-cut key of extend is “EX”.

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Chamfer: The Chamfer command enables you to create a chamfer between any two non

Short-cut key of chamfer is “CHA”.

Fillet: The Fillet command is a very useful tool which allows you to draw an arc between

two intersecting lines or adjacent polyline segments.

Explode: The explode command allows you to change a g

elements so it can be edited.

Array: The array command in AutoCAD is used to make multiple copies of objects. Although you

can use the copy command to duplicate objects, the array command is more flexible

and precise. One advantage of using the array command is that it allows you to copy

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The Chamfer command enables you to create a chamfer between any two non

of chamfer is “CHA”.

The Fillet command is a very useful tool which allows you to draw an arc between

two intersecting lines or adjacent polyline segments. Short-cut key of fillet is “F”.

The explode command allows you to change a grouped item into its individual

The array command in AutoCAD is used to make multiple copies of objects. Although you


e advantage of using the array command is that it allows you to copy

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The Chamfer command enables you to create a chamfer between any two non-parallel lines.

The Fillet command is a very useful tool which allows you to draw an arc between

cut key of fillet is “F”.

rouped item into its individual

The array command in AutoCAD is used to make multiple copies of objects. Although you


e advantage of using the array command is that it allows you to copy

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objects in a defined angle and exact number of copies. Therefore, you can create array in various

pattern.

Types of Array:

1. Rectangular Array

2. Polar Array

Creating rectangular array:

1. Type array in the command line or select from the modify toolbar. 2. Select the object you would like to array. 3. Input the number of rows. (negative number for downward array) 4. Input the number of columns. (negative number will point array to the left) 5. Pick or input the distance for the Row offset. 6. Pick or input the distance for the Column offset. 7. Enter the Angle for the array. (Use the default 0 degree). 8. Select the Preview button to see the sample array before you hit the Ok button. 9. You can accept the array or modify it. (Optional step).

Layer: To organize our drawing into groups of objects, we make layers. For example in a floor plan

of a building, you want to keep the walls, ceiling, plumbing fixtures, wiring, and furniture separate so

that you can display or plot them individually or combine them in different ways. Then you need to

make different layers of different objects.

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Important points:

• In AutoCAD we make different layers then overlay them. • Each layer has the different properties. • We can turned on the layer when we need it and similarly we can turned off the

layer when we don’t need it. • Create as many layers as you want. • Change the visibility of drawing layouts.

Layer properties manager: The Layer properties manager dialog box shows you at a glance the status of your layers.

Layer properties manager manages all the layers and its properties.

Steps to create layer:

1. Type layer in the command line or select from the layer toolbar. 2. By default AutoCAD will name the layer “layer1”. 3. Double click and rename it. 4. In the right column you can assign color, line type to the layer. 5. Select the object in the drawing to which the layer will be assigned. 6. Click on the layer icon bar and select the appropriate layer.

Line Types: Format or the pattern of a line is said to be the line type. In AutoCAD there are many

different types of line. When you first start AutoCAD, the default template has only one linetype is

available. This is the continuous linetype. AutoCAD has many more available, but only loads in one to

start with in order to keep the drawing file size smaller. If you need a different linetype, you must

load it into your current drawing.

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Line Weight: Another property of lines is their lineweight, or how wide they display on the screen and

when printed. Lineweight is the thickness of line.

Object Properties: Every object has its own properties. For example, a line has

geometric properties, such as its length, and coordinates that

define its endpoints.

Object Properties WindowThe Object Properties window shows properties of the

selected object. This is also known as Object Properties Manager

(OPM), Object Properties Palette.

Boundary: The Boundary

command creates a

polyline outline or region

within a selected area.

Boundary makes our object

as a single object. The alias

for boundary is “BO”.

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Another property of lines is their lineweight, or how wide they display on the screen and

Lineweight is the thickness of line.

Every object has its own properties. For example, a line has

geometric properties, such as its length, and coordinates that

ties Window: The Object Properties window shows properties of the

This is also known as Object Properties Manager

(OPM), Object Properties Palette.

Object Properties Palette

Boundary

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Another property of lines is their lineweight, or how wide they display on the screen and

Object Properties Palette

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Drawing Points: We have a tool to draw a Point in drawing toolbar. Alias for point is “PO”.

Point Style: Point Style can be choose from:

Format � Point Style

Setting out equal distance: For setting out equal distance, we have a command of “Measure”. Measure’s alias is “ME”.

Use of Measure: � Enter the command of Measure.

� Select the object to measure.

� Type the required distance.

� Now there will be points on the object with the equal distance.

Text: Text can be added to an AutoCAD drawing to create notes and labels on your drawings.

Text Types: There are two types of text in AutoCAD.

� Single Line Text (Text)

� Multi Line Text (MText)

Single Line Text:

The text command is a simple way to add basic text notes. The height and rotation of the

text can be quickly specified and the text can be viewed on the drawing while being typed. We can

choose it from Draw � Text or simply type “Text” in command area.

How to use Single Line Text:

1) Enter the command “text” into the command area.

2) When prompted for a start point, select somewhere in the screen just left of centre

3) When asked for a height, enter the height of required text.

4) When asked for a rotation angle, hit enter to accept the default of 0 or enter the required angle.

5) Now simply enter your text.

6) Hit return twice to exit the text command.

Multi Line Text:

Multiline text is the more advanced text tool within AutoCAD. It can be chosen from the

'draw' toolbar by the icon. The multiline text command has its own editor, with all the options

available that you'd expect to see in a word processing program. Alias for MText is “T” and “Mtext”.

Dimension: Physical value of an object is known as its dimension. Dimension can be defined as the

numerical value that defines the size or geometric characteristic of a feature.

Types of Dimension: The following list shows the AutoCAD’s common methods for starting dimensions.

� Linear

� Aligned

� Baseline

� Continue

� Angular

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� Radius

� Diameter

Linear Dimension: Linear dimension measures the straight line’s distance (either X or Y coordinate values) from

one point to other. Alias of linear dimension is “DIMLINEAR” or “DLI”.

Aligned Dimension To get the true length dimension of the inclined object we use Aligned dimension, which

creates the dimension aligned with the object. Alias for aligned dimension is “DIMALI” or “DAL”.

Continue Dimension: Continue dimensioning, also called chain dimensioning or point-to-point dimensioning, places

the dimensions in a line from one feature to the next. Alias of this dimension is “DCO”.

Baseline Dimension: Baseline dimension (sometimes referred to as parallel dimensioning) is used to draw

dimension to multiple points from a single baseline. The first extension line origin of the initial

dimension (it can be linear, angular or ordinate dimension) establishes the base from which the

baseline dimensions are drawn. That is, all the dimensions in the series of baseline dimension will

share a common first extension line that can be its origin. Alias for this dimension is “DBA”.

Linear & Aligned Dimention Aligned Dimention Linear Dimention

Continue Dimention

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Angular Dimension: Angular dimensions measure the angle between two lines or three points. Alias of angular

dimension is “dimang” or “dan”.

Diameter Dimension: This feature of dimension provides us to create diameter dimensions for arcs and circle

depending on the size. Alias for diameter dimension is “DIMDIA” or “DDI”.

Radius Dimension: Radius dimensions are used to create radial dimensions of arcs or circles Alias for radius

dimension is “DIMRAD” or “DRA”.

Dimension Style: A dimension style is a named group of dimension settings. When you apply a style to an

object, the setting determines the format of that object. Similarly when you apply style to

dimension, the setting determines the format of dimension. The command of Dimension Style can

be chosen from Dimension� Dimension Style OR Simply Type “D” in command area for dimension

style.

Block: A block in AutoCAD is a collection of all of the line and arc entities that create an object,

'moulded' together to make one selectable object. Selecting one particular entity (such as a

midpoint of a line for example) will select all objects contained within the block. They can be moved,

rotated, mirrored etc and will always be treated by AutoCAD as one whole object.

Angular Dimention Diameter Dimention Radius Dimention

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Types of Block:

Block has 2 types:

• Make the Block • Write the Block

To Create Blocks Within a Drawing:

1. From the draw menu, choose BlockMake. Or type “BLOCK” or “B” in the command line.

2. At the prompt of the block definition dialog box, enter a block name in the name box. 3. Under objects, select Convert to Block.

Disregard the other options. As selecting delete will erase the original objects used to create the block definition in your drawing, so make sure the Delete option is not selected.

4. Choose select objects. 5. Use your mouse to select the objects to be included in the block. Then press enter or

the space bar to complete object selection. 6. Under base point, choose pick point or specify on-screen and use your mouse device

to specify the block insertion point. You can also enter the X,Y,Z coordinate of the point manually (but not recommend).

7. In the description box, enter a description for the block. This will be displayed in AutoCAD Design Center. (Optional Step)

8. Under behavior, check allow exploding if you want to disassemble them later. 9. Select OaK to close the block definition dialogue box.

Block Drawing

To create Drawing Files for Use as Blocks (Wblock): 1. Open an existing drawing or create a new drawing containing the objects to be converted

into block.

2. In the command prompt, enter “WBLOCK” or “W”,

3. In the write block dialog box, choose select objects.

4. Use your mouse to select the objects to be included in the new Wblock. Then Press enter or

the space bar to complete object selection.

5. Under base point, choose pick point or specify on-screen and use your mouse device to

specify the block insertion point or specify the XYZ coordinate to be (0,0,0).

6. Under destination, enter a file name or browse to the directory where you want to save the

new block.

7. Select OK to close the Write block definition dialogue box.

WBlock

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Insert a Block:

• Type “I” for insert.• Then choose the required block name.• Press ok.

Polyline: Polylines differ from lines in that they are more complex objects. A single polyline can be

composed of a number of straight

“PL” in command area for polyine.

SPLine: A spline is a smooth curvilinear line that is fitted

along a number of control points.

spline is “SPL”.

Multiline: Multilines are complex lines that consist of between

1 and 16 parallel lines, known as elements. The default

multiline style has just two elements but you can create

additional styles of an almost endless variety. The Multiline

Style command enables you to create new multiline styles

by adding line elements, changing the color and linetype

and etc… Activate the tool from:

Draw � Multiline Or Type “ML” in command area

for Multiline.

The Multiline Style CommandPull down “Format” and choose “Multiline Style”.

area for multiline style.

AutoCAD

21

Type “I” for insert. Then choose the required block name.

Polylines differ from lines in that they are more complex objects. A single polyline can be

composed of a number of straight-line or arc segments. Pick the tool from Drawing toolbar

“PL” in command area for polyine.

curvilinear line that is fitted

along a number of control points. The short-cut key for

Multilines are complex lines that consist of between

1 and 16 parallel lines, known as elements. The default

wo elements but you can create

additional styles of an almost endless variety. The Multiline

Style command enables you to create new multiline styles

by adding line elements, changing the color and linetype

Activate the tool from:

Type “ML” in command area

The Multiline Style Command: Pull down “Format” and choose “Multiline Style”. Or Simply type “MLStyle” in command

2013-BT-CIVIL-09

Polylines differ from lines in that they are more complex objects. A single polyline can be

Pick the tool from Drawing toolbar Type

Simply type “MLStyle” in command

AutoCAD


Design Centre: The AutoCAD Design Center is a graphic interface where you can manipulate and re-use

drawings and drawing objects (blocks, layers and etc) from drawing files and Internet locations. This

way, you can speed up drawing constructing. Design Center lets you keep track of your favorite files

and helps you locate files, blocks, and other drawing components. In addition, you can import blocks

and other drawing components from one drawing to another by using a simple click and drag. The

AutoCAD Design Center is one of the most efficient ways of sharing information between projects

and drawings. “DC” is used as alias of Design Center.

auto cad

Documents

autocad definition of

type of user interface

advantage of autocad

types of interface

disciplines interface

graphical user interface

model drawing space

default autocad menus