AutoCAD 2D and 3D basics from interhsala

1. BY-
VASUDEV
BRANCH-MECHANICAL
5TH SEMESTER
SECTION B
CRN - 54
College-BIT DURG
URN-
300103719113

2. AutoCAD From

3.  Introduction
 History
 Giving commands
 Object snap
 Zooming and panning
 Drawing 2D shapes
 Drawing 3D shapes
 Editing
 UCS
 Assignment
 The AutoCAD Advantage
 The Disadvantages of AutoCAD

4.  AutoCAD is a commercial software application for 2D and
3D computer-aided design (CAD) and drafting — available
since 1982 as a desktop application and since 2010 as a
mobile web- and cloud-based app marketed as AutoCAD
360.

5.  AutoCAD was derived from a program begun in 1977 and
released in 1979 called Interact CAD, also referred to in
early Autodesk documents as MicroCAD, which was
written prior to Autodesk's (then Marinchip Software
Partners) formation by Autodesk cofounder Mike Riddle.
 The first version by the AutoDesk Company was
demonstrated at the 1982 Comdex and released that
December.
 The 2016 release marked the 30th major release for the
AutoCAD for Windows. The 2014 release marked the
fourth consecutive year for AutoCAD for Mac.

6.  Interfaace ,drawing aids and Basic objects
 Complex Objects and Objects editing
 Block and Annotations
 Plotting and introduction to 3D
 The Final objects

8.  Command line
 Toolbars
(view/Toolbars)
 Drop-down menus
You can pick any one(s) that you are comfortable with.

9.  You will need to zoom in and out while drawing
with AutoCAD. This doesnt change your objects
or UCS, only the way you see your working space.
This can be done in many ways:
1. Scroll bars
2. Typing z or zoom in your command window.
 All
 Center
 Dynamic
 Extents
 Previous
 Scale
 Window

10. 1) UNITS – The units are used to represent the dimensions in Autocad.

11.  LIMITS – the limits command in autocad is used to set an
invisible rectangular boundary in the drawing area or viewport.
 MOVE – Move objects a specified distance in a specified
direction.

12.  ERASE - To erase object you can enter E in command
window or click the erase too.
 OFFSET – Offset the object in a specified distance in a
specified direction.

 TRIM – You can trim the portions you don’t want in the
drawing by using this command.
 STRETCH – you can stretch most geometric objects. This
lets you lengthen and shorten parts of your model.
 EXPLODE – The explode command disassociates a
compound object into its component parts. you can
explode objects such as polylines, hatches, and blocks.

13.  COPY
 MOVE
 MIRROR
 ARRAY
 SCALE
 STRETCH

14.  STRETCH
 EXPLODE
 OFFSET
 ROTATE
 ERASE

15.  remember that AutoCAD recognizes an object
by its coordinates. You will need two given
points to draw a line.
 You can start at a random point on your WCS
for your FIRST POINT, but you should
specify the coordinates of your SECOND
POINT.
(x1,y1,z1)
(x2,y2,z2)

16.  Rectangle: two diagonal lines
(pick first point, select the second one with
relation to the first. @5<-33)
 Circle/Arc: center and radius
 Polygon: specify the number of edges and
length of a side
A small tip: you can use the EXPLODE
command for the tool to split the object
into its components or lines
a
b
a
d
d

17.  Hatching is used to add shaded patterns to objects and shapes
within an Autocad drawing. Hatch patterns can be used to
indicate a material to be used, such as a concrete hatch.
Alternatively it could be used to make an area of a drawing stand
out.
 You will pick:
 Pattern
 Scale
 Angle
 points

18.  If you “extrude” a surface into the third
dimension, you simply add a thickness in
section. This basically is same as creating a
“solid” object
Extrude 5
units 5 units
Extrude -4
units
4 units

19.  The AutoCAD world is 3 dimensional. However, if we want to
draw a 2d object, such as a plan or a section, we will use only 2
dimensions (x and y).
 WCS (world coordinate system) is the imaginary plane that is
parallel to the ground. It is the default coordinate system.
 Modifications made to the World Coordinate System (WCS)
result in a User Coordinate System (UCS). It is the plane that
you work on. It enables the user to draw 3 dimensional objects.
 To create a new UCS, type ucs on the command window, then
say New and specify 3 points on your new UCS plane.

20.  —Prompt: Command: Type ucs and press Enter.
 —Prompt: Enter and option [New/Move/ orthoGraphic /Prev/
Restore/Save/Del/ Apply/?/World] <World>: Type in n for the
New option and press Enter. —Prompt: Specify origin of new
UCS or [Zaxis/ 3point/ OBject/ Face/ View/X/Y/Z <0,0,0>: Type
3 to select the 3point option and press Enter.
 —Prompt: Specify a new origin point <0,0,0>:Use an Osnap or
coordinate to select the position for a new 0,0,0 point (this
selects the junction of the X, Y, and Z axes). NOTE: The
intersection Osnap will NOT work with solid models.
 —Prompt: Specify point on positive portion of X-axis
<1.000,0.000,0.000>:Use an Osnap or coordinate to select the
direction of the desired X-axis. NOTE: The numbers inside the
brackets< > will not necessarily be the same as those shown in
this example.
 —Prompt: Specify point on positive-y portion of the UCS XY
plane <1.000,0.000,0.000>: Use an Osnap or coordinate to select
the direction of the Y-axis. The UCS icon should change position
to indicate the new UCS orientation.

21. 3D model

23.  More Accuracy
 Long Time Save
 Reduced Training Time/Cost
 Improved Quality over Hand Drafting

24.  Editing and overlapping lines is limited to a few options.
 Limited File Formats
 Limited Color, Fill and Texture
 Editing the 3D models requires many steps.

25. Thanks