cad

2. • Computer Aided Drawing /Drafting is a process of preparing a
drawing of an object on the screen of a computer.
• There are various types of drawings required in different fields of
engineering and science .In the field of mechanical engineering
the drawing of machine components and layouts are prepared.
• In the field of civil engineering plans and layouts of buildings are
prepared.
• In all other fields of engineering use of computer is made for
drawing and drafting

4. Conceptualize his ideas
 Modify the design very easily
 Perform animation
 Make design calculations
 Use colours ,fonts and other aesthetic features

5.  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.
 Hatching of all sections with different filling
patterns.
 Preparation of assembly or sub-assembly
drawings.
 Preparation of part list.
 Machining and tolerance symbols the
required surfaces.
 Hydraulic and pneumatic circuit diagrams
with symbols.
 Isometric views.

6. It require large amount of computer memory.
 The size of the software package is large.
 Skill and judgment are required to prepare the
drawing.
 Huge investment.

7.  AutoCAD package is suitable for accurate and prefect drawing of
engineering designs.
 The drawing of machine parts, isometric views and assembly
drawings are possible in Auto-CAD.
 This package is suitable for 2 D & 3D drawings .

8. The Auto-CAD is used by the designers, painters, Civil,
Mechanical, Electrical, Electronics, Civil engineers in their
field.
Line, curves, text and filling point are the essential
elements used for preparation of any drawing on the
screen.
Computer aided drafting is done by the operators by
placing the mouse pointer at the desired location and then
executing the command to draw the graphic elements
using different methods.