The document provides information about AutoCAD, including: 1. AutoCAD is 2D and 3D modeling software developed by Autodesk for computer aided design (CAD). It allows for precise drawing and modeling with benefits like improved productivity and accuracy. 2. The interface of AutoCAD includes common elements like menus and ribbons as well as drafting specific tools. Drawing units and limits can be customized. 3. Basic objects in AutoCAD like lines, circles, and arcs can be created using commands in the ribbon. Selection tools allow objects on screen to be precisely selected.

1. RAJKIYA ENGINEERING COLLEGE

3. Contents
1. Introduction To AutoCAD
2. Interface, Drawing Aids & Basic Objects
i. Introduction to Interface of AutoCAD
ii. Units and Limits
iii. Creating lines
iv. Points, Circle and Arc
v. Precision
vi. Selecting Object On Screen
AutoCAD

4. 1. Introduction to Auto CAD
• The Word AutoCAD is made up of two words “Auto(logo of company)”and CAD “(computer aided design)”.
• AutoCAD is 2D and 3D modeling software.
• It is developed by Autodesk company.
• Autodesk is an U.S.A based company.
• It is widely used in industry for 2D drawing and 3D modeling.
• In another way we can say that AutoCAD is a designing course, which is performed by the help of computer.
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5. There are huge benefits of AutoCAD for engineers, who really want shape there work from paper to Enhanced
Graphical Capabilities in 2D or 3D. Using AutoCAD it is highly precise with no error.
There are some benefits that are listed:
• Improved productivity in drafting.
• Shorter preparation time for drawing.
• Reduced manpower requirements.
• Customer modifications in drawing are easier.
• More efficient operation in drafting.
• Low wastage in drawing.
• Minimized transcription errors in drawing.
• Improved accuracy of drawing.
• Assistance in preparation of documentation
• Better designs can be evolved.
• Revisions are possible.
• Colures can be used to customize the product.
• Production of orthographic projections with dimensions and tolerances.
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6. • Hatching of all sections with different filling patterns.
• Preparation of assembly or sub-assembly drawings.
• Preparation of part list.
• Machining and tolerance symbols at the required surfaces.
• Hydraulic and pneumatic circuit diagrams with symbols.
• Isometric views.
Person Shooting Arrow With less Error
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7. 2. Interface, Drawing Aids & Basic Objects
In this section, introduction to user interface of AutoCAD. and how to draw basic objects like line, circle and arc.
i. Introduction to Interface of AutoCAD
Its Interface is not like rocket science, its GUI (Graphical User Interface), simple but not very easy, you need some
time to become familiar with it.
Just Like Any other Application it has similar GUI.

9. Application Menu
Here You Can Open,
Save, Import
AutoCAD Format
file(*.dwg), change
scale and more
Here you can search for
in AutoCAD

10. Ribbon
Here you can draw line, arc, circle, arc, move highlighted object,
rotate, fillet command, and all basic and most used functions.
The visibility of each of these can be controlled by the user. The viewport controls
are in the upper left corner, and allow you to change the view and visual style. The
Viewcube is in the upper right, from which you can change the view and UCS. Just
below that is the NavBar, that gives you controls for zooming, panning, orbiting, and
more. Lastly, in the lower left hand corner, is the UCS icon, which can tell you at a
glance if you are in WCS, and/or the general orientation of the UCS

11. Status Bar

12. ii. Units and Limits
Limits and units can be set in AutoCAD. As well as direction.
Under Drawing Units, select the desired units.
Various imperial and metric units are available. The units that you select determine the unit of measurement that each
unit in your drawing represents. For example, if you select Inches, each drawing unit equals one inch.
To scale objects that you insert into the current drawing from drawings with different drawing units, select Scale Objects
Inserted from Other Drawings.
Clear this option to insert objects at their original size without scaling. For example, if an item that is one inch long were
inserted into a drawing set to millimeters, this setting would scale the item to 25.4 mm in length when enabled. With
this setting disabled, it would remain one unit long (which would now be only one millimeter rather than one inch).
Under Length, select a unit type and desired precision.
Under Angle, select an angle type and desired precision.
If you want to measure angles clockwise instead of counterclockwise, select Clockwise.
Under Base Angle, enter a value for the default 0 angle direction. The default is 0 degrees (East) and a counter-clockwise
direction.
Imported survey drawings may include drafting instructions where changing the base angle might be desirable to
properly orient the data.

13. Value Direction
0 East
90 North
180 West
270 South

14. iii. Creating lines

15. iii. Points, Circle and Arc
Use Circle or arc command to draw circle, in ribbon menu.

17. v. Precisions
When working in imperial units, I usually have the length
type set to Engineering (feet, inches and decimal inches),
and the precision set to at least five decimal places,
because I want to see it if a particular dimension is
0.120" or 0.130", rather than exactly 0.125".
Architectural units set to the "equivalent" 1/32" precision
would show all three of those numbers as 1/8". Maybe
not a big deal for just one dimension (yes, I know that a
tolerance of 1/4" in the field would be extraordinarily
precise for the actual construction), but I prefer to have
my drawings be as precise as possible so that I really
know what I "should" have and then do my design to
allow for field tolerances, rather than have the drawing
itself be a hot mess before field tolerance comes into
play.

18. Selecting Object On Screen