FULL FORMS

CADD Computer aided design & drafting

CAD Computer aided design

CAM Computer aided manufaturing

CAE Computer aided engineering

ISO International standard organization

MCAD Mechanical CAD

CNC Computer numeric control

VMC Vertical machining center

Dxf Data exchange format

IGES International graphics exchange specification

By using CADD we can make drawing:

Quick

Accurate

Neat & clean

Highly presentable

Highly precisionAutoCADAutoCAD, developed by AutodeskAutoCAD Screen

Various components of the initial AutoCAD screen are drawing area, command window, menu bar, several toolbars, model and layouts, and the status bar. A title bar that has AutoCAD symbol and the current drawing name is displayed on top of the screen.

AutoCAD ScreenTOOLBARS2D TOOLBARS

Modify ToolbarDraw ToolbarDimension Toolbar

Layers Toolbar

Properties Toolbar

3D TOOLBARS

Modeling Toolbar

Orbit Toolbar

Solid Editing

UCS Toolbar

View Toolbar

Visual Style ToolbarPAGE SETUPFormat > units > insertion scale > select unit >inches/cm/mm (according to requirement) > okFormat > drawing limits > specify lower left corner > put limits 0,0 > enter > specify upper right corner > put limits like 1000,1000 > enterFormat > dimension style > modify > symbols and arrows > arrow size > put value like 2 (according to requirement) > ok

Modify > text > text height > put value like 2 (according to requirement) > text alignment > iso standard > ok

Modify > primary units > precision > take precision according to requirement > ok > set current > ok

View > zoom > all.OR

We can use default page:

Acadiso

File > new > acadiso > openCOMMANDS

LINE

Line command is used to draw a continuing series of line segments, but each line segment is a separate object. We can invoke the LINE command from the Draw toolbar.Short cut key: L + enter Take command > Specify first point by using left click > give direction by move the cursor > put value like 100 > enter > esc. XLINEThe XLINE command can be used to draw construction or projection lines.

Take command > h > enter (for horizontal line) > draw it by using left click on screen > esc.

Take command > v > enter (for vertical line) > draw it by using left click on screen > esc.

Take command > a > enter (for angular line) > give angle value > draw it by using left click on screen > esc. PLINE

The PLINE command is used to draw a polyline. A polyline is a line that has different features. The term POLYLINE can be broken into two parts: POLY and LINE. POLY means many. This signifies that a poly line can have many lines. You can create straight line segments, arc segments or a combination of the two. POLYGONTake command polygon > number of sides (enter a value between 3 and 1024) > enter > specify center of polygon (by using left click on the screen) > select circumscribed about circle (or c + enter) > specify radius of circle > enter.

Take command polygon > number of sides (enter a value between 3 and 1024) > enter > specify center of polygon (by using left click on the screen) > select inscribed in circle (or i + enter) > specify radius of circle > enter.

Take command polygon > number of sides (enter a value between 3 and 1024) > enter > e enter > specify first endpoint of edge > specify second endpoint of edge > enter.

RECTANG

Take command RECTANG > Specify first corner point (by using left click) > d + enter > length enter (horizontal) > width enter (vertical) > left click.

Rectangle with chamfer

Take rectang command > right click > chamfer > put chamfer dimentions > give rectangle start point (by using left click) > d + enter > give length > give width > enter > left click on screen.

Rectangle with fillet

Take rectang command > right click > fillet > put fillet radius dimention > give rectangle start point (by using left click) > d + enter > give length > give width > enter > left click on screen.

ARCAn arc is defined as a part of a circle. In AutoCAD, it can be drawn using the ARC command. AutoCAD provides eleven different options to draw an arc. To view these options, click on Draw option in the Menu Bar, a flyout option will appear as shown in fig. below

Options in Menu Bar for Creating an Arc

Take command ARC > Specify start point of arc > Specify second point > Specify the end point. CIRCLEThe CIRCLE command is used to draw circles. AutoCAD provides six different options to draw a circle. To view and choose from the available options, click on Draw option in the Menu Bar, a flyout will appear as shown in fig. below

Options in Menu Bar for creating a CircleTake command CIRCLE > click on screen to specify center point for circle > put the value of radius directly > enter.

Or

Take command CIRCLE > click on screen to specify center point for circle > d + enter > put the value of diameter > enter.

REVISION CLOUDTake command > a + enter > specify minimum arc length ( like value 10) > specify maximum arc length ( like value 12) > O + enter > click on object > enter

Take command > a + enter > specify minimum arc length ( like value 10) > specify maximum arc length ( like value 12) > O + enter > click on object > y+ enter

SPLINE Create a smooth curve that passes through or near specified points.

Take command > specify first point by using left click > specify next point > specify next point according to requirement > triple enter (i.e. enter enter enter).

ELLIPSEIf a circle is observed from an angle, the shape is called an ellipse, which can be created in AutoCAD using the ELLIPSE command. An ellipse can be created by two different options and these options are grouped together in the Draw option of the Menu Bar.Command: ELLIPSE > Enter

Take command > Specify axis endpoint of ellipse by using left click of mouse > Specify other endpoint of axis by entering value like 100 > Specify the half length of second axis.

ELLIPSE ARC

Create an elliptical arc.

MAKE BLOCK

Take command > select object > right click > pick point > take base point > give name > ok. INSERT BLOCK

Insert a block or a drawing into the current drawing.

POINT

Create multiple points. HATCH

Take command > add pick point > pick internal point by using left click > right click > enter > select pattern > ok GRADIENT

Same as hatch with colours.

REGIONThis command is used for converting the relation of LINE into POLYLINE. Before using this command the sketch should be closed from all sides.

Take command > select all lines > right click.

EXPLODEThis command is used for converting the relation of POLYLINE into LINE.

Take command > select the POLYLINE or closed object > right click.

ERASE

To erase objects from drawing, we can use ERASE command.Take command > Select object > Enter COPY

The COPY command is used to copy an object at a specified distance in a specified direction.Take command > Select objects to copy > right click > take base point > use it by clicking.COPY WITH BASE POINTCopy a drawing in a new window.

Select object > right click > copy with base point > take base point > go into new window > right click > paste > left click.

MIRROR

The MIRROR command creates a mirror copy of the selected object.Take command > Select objects to be mirrored > Specify first point of mirror line by using left click > Specify second point of mirror line > enter.Delete source objects? [Yes/No] : Enter Y for deletion, N for retaining the objects. OFFSET

To draw parallel lines, concentric circles, arcs, curves, and so on, we can use the OFFSET command.Take command > give distance value > enter > select object > use it by clicking.ADVANCED OFFSET

Take command > e + enter > erase source object after offsetting > select yes > give distance value > enter > select object > use it by clicking.

ARRAYAn array is used to creating multiple copies of the selected object and arranging them in a rectangular or circular fashion. RECTANGULAR ARRAY

Rectangular Array option in Array dialog boxTake command > rectangular array > click on select object > select object > right click > give no.s of rows and columns > offset distance > ok.POLAR ARRAY

Polar Array option in Arrray dialog boxTake command > polar array > click on select object > select object > right click > center point(click on image) > take center point > give no.s of items > ok. MOVE

This command used to move objects from their current location to a new location.Take command > select object > right click > take base point > move object. ROTATE

This command used to rotate objects from their current location to a specific angle.

Take command > select object > right click > take base point > put angle value > enter.Advanced rotate or rotate with copy:Take command > select object > right click > take base point > c + enter > angle value + enter.

SCALEEnlarge or reduce selected object, keeping the properties of the object same after scaling.Take command > select object > take base point > put value(like I want 2 times or 0.5 times) + enter.

STRETCHThis command used to stretch the objects from the selected base point.Take command > select object with green window > right click > take base point > put value > enter. TRIMThis command used to trim the objects from the selected side. Take command > right click > use it. EXTENDWith the use of this command, we can increase the line upto the specific point or location. Take command > right click > use it. BREAK AT A POINTWith the use of this command, we can break the line at a point where we required. Closed object such as circle cannot be broken at a single point.

Take command > select object like line > click at that point where you want to break. BREAKWith the use of this command, we can break the line with a specific distance or upto a specific point as much we required. Take command > select object (when we select object it take first point) > specify second point. JOINJoin similar objects to form a single, unbroken object.Take command > select first line > select second line > right click. CHAMFERThis command is used for removing the sharp corners.Take command > a + enter > put value (like 10) + enter > angle value (like 45) + enter > click on first line > click on second line.Distance distance chamfer :

Take command > d + enter > first value + enter > second value + enter > click on first line > click on second line.

Advanced chamfer:Take command > a + enter > dimension + enter > angle value + enter > t + enter (select trim or no trim) > click on first line > click on second line. FILLETThis command is used for removing the sharp corners. Take command > r + enter > radius value (like 10) + enter > click on first line > click on second line.

Advanced fillet :

Take command > r + enter > radius value + enter > t + enter (select trim or no trim) > enter > click on first line > click on second line. TABLEThis command is used for creating a table.Take command > select (specify insertion point or specify window) > give no.s of rows and columns > ok. TEXTThis command is used for creating a text.Multiline text : Take command > specify first corner by using left click > specify second corner > type text > ok.

Single line text : Draw > text > select single line > specify first point > give text height > enter > give angle > enter > type text > click on screen > esc.

SHORTCUT KEYS :

Tools > customise > edit program parameters > all short cut keys of autocad is in the file.

ARC A + ENTER, CIRCLE C + ENTER, COPY CO + ENTER, DIMSTYLE D + ENTER, ERASE E + ENTER, EXTEND EX + ENTER, FILLET F + ENTER, LINE L + ENTER, MOVE M + ENTER, MIRROR MI + ENTER, MTEXT MT or T + ENTER, OFFSET O + ENTER, PLINE PL + ENTER, PEDIT PE + ENTER, ROTATE RO + ENTER, SCALE SC + ENTER, SPELLCHECK SP + ENTER, TABLE TB + ENTER, TRIM TR + ENTER, UNITS UN + ENTER, EXPLODE X + ENTER.

3D

POLYSOID : Take command > right click > height > give height dimension + enter > right click > width > give width dimension + enter > o + enter > select sketch.

BOX : Take command > specify starting point > right click > cube > give dimension > enter.

Or

Take command > specify starting point > right click > length > give length dimension + enter > width dimension + enter > height dimention + enter.

WEDGE : Take command > specify starting point > cube > give dimension > enter.

Or

Take command > specify starting point > right click > length > give length dimension + enter > width dimension + enter > height dimention + enter.

CONE : Take command > specify center point > give radius value + enter > give height of cone > enter.

SPHERE : Take command > specify center point > radius (or diameter by right click) > enter.

CYLINDER : Take command > specify center point > give radius value + enter > height of cylinder > enter.

TORUS : This command is used to make a circular tube.

Take command > specify center point > give radius + enter > tube radius > enter.

PYRAMID : Take command > specify center point > dimension + enter > height > enter.

Or

Take command > right click > sides > enter no.s of sides > specify center point > dimension + enter > height + enter.

HELIX : Take command > specify center point > give first radius value + enter > give second radius value + enter > right click > turns > give no.s of turns + enter > height value + enter.Then we can use sweep command.

PLANAR SURFACE : Take command > specify first point > give dimension > enter.

Its value will be corner to corner. This surface can be solid, extrude.

EXTRUDE : Creates a 3D solid by extruding a 2D object.

The sketch must be closed and region.

Take command > select 2D object > right click > give dimension > enter.

PRESSPULL: To increase or decrease side of object.Take command > click on surface > move or give dimension.

SWEEP : To make an object like pipe.

In this path is changed and cross section is same.

Draw a path and also draw a cross section like figure.

Take sweep command > select cross section object > right click > click on path.

REVOLVE : Use like mirror command.

Take command > select object > right click > give axis points > give angle of revolution > enter.

UNION : This command is used for combining two solid objects.

Take command > select objects > right click.

SUBTRACT : This command is used for subtract a shape.

Take command > select object that you want to keep > right click > select object that you want to subtract.

INTERSECT : Take command > select objects > right click > only comman part you get.

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