AUTO CAD 2012

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INTRODUCTION•Auto cad is a Cad software of Autodesk.

•It is invented in 1982 in US.

•Auto cad LT and Auto cad Mastering.

•Previously used in DOS, now a day used in windows.

•Used in every field Mechanical, Civil, Arch, Electrical, Interior Design, Automobile etc..

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Auto Cad Interface

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Types of Co-ordinates1.Absolute Co-ordinate.

2.Relative Co-ordinates.

3.Polar Co-ordinates.

AND

DDE (Direct Distance Entry ) Method

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Absolute Co-ordinate• Absolute coordinates are based on the UCS origin (0,0)

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Absolute Co-ordinate• Absolute coordinates are based on the UCS origin (0,0)

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Absolute Co-ordinate

(X,Y)

(0,0)

(X,Y)

(30,0)

(X,Y)

(30,20)

(X,Y)

(0,20)

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30

20Y

X1 2

34

Relative Co-ordinates• Relative coordinates are based on

the last point entered.

• When you know the location of a point in relation to the previous point.

• Use @ sign. For example, entering @3,4

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Relative Co-ordinate

(Click Any where)(@30,0)

(@0,20)(@-30,0)

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30

20Y

X

Y

XY

XY

X

(@0,-20)

1 2

34

Polar Co-ordinates

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• Polar coordinates use a distance and an angle to locate a point.

• Use @ dis < angle. For example, @50<45

Polar Co-ordinate

(@30<0)

(@20<270)

(@20<90)(@30<180)

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30

20

START YOUR 1ST CLASS-ALL THE BEST.

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34

90

0

Click any where

90

0

90

0180

270

90

0180

270

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