Transcript CAD/CAG

CAD/CAG
Advantages And Disadvantages
Computer K & I
You will need to know about a number of things to do
with computers:
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Advantages & disadvantages of CAD (Computer
Aided Drawing) and CAG (Computer Aided Graphics).
Input & Output devices and their uses.
Some commands and techniques of using 2D & 3D
CAD packages.
Advantages of CAD
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Reduced storage space required.
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Previously, paper drawings would
have required whole rooms to store
the drawings for a building.
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Now this information can be stored on
a single disk.
Advantages of CAD
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Corrections can be made easily.
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Before, whole drawings may
have had to be reproduced on
paper if a mistake has been made.
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Now a single line is deleted
and redrawn in the correct place.
Advantages of CAD
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Repetitive parts of the drawing
can be saved and imported as
part of a “drawing library”.
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Paper drawings require objects
to be redrawn each time manually
which is time consuming.
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Being able to call the parts in
from a library saves the user time.
Advantages of CAD
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It takes less time to produce drawings using CAD
systems than traditional manual drawing methods.
Advantages of CAD
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Drawings offices often produce their drawings using a
standard layout so that people can immediately
identify the drawings as belonging to that particular
company.
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Templates can be set up on a computer to make this
easier.
Advantages of CAD
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Drawings can be enlarged or reduced with no loss of
detail.
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Grid Snap, Zoom and Attach commands enable
accuracy to be maintained even in the smallest detail.
Advantages of CAD
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CAD systems can be linked with CAM machines to
produce objects straight from the drawings.
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This is referred to as CAD/CAM.
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CAM stands for Computer Aided Manufacture.
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This is a cheaper and quicker method of producing
the final product.
Advantages of CAD
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Because 3D CAD designs are so realistic and can be
made to look like the actual material they will be
made from, clients can see exactly what is being
made so a physical model is not required, reducing
costs and the time it takes to design a new product.
Advantages of CAD
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Designers can use powerful CAD computer packages
to make virtual reality simulations of the layout of
their buildings.
This means that the client can have a “look around”
the building before it is built and changes can be
made at this early stage.
This results in a faster design of the building and a
higher quality end product.
It is also cheaper to make any changes at this stage
rather than while the building is being constructed.
Advantages of CAD
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On an ever greater scale, the Internet can be used to
share plans and designs with anyone in the world
that also has an Internet connection.
This means that specialised work can take place
between different countries quickly and cheaply.
Disadvantages of CAD
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Initial costs of buying a
computer system are high.
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As computer systems can be used to produce
quicker CAD drawings less people need to be
employed.
Disadvantages of CAD
 CAD/CAM systems also means less people need to
be employed.
 It takes a long time to make CAD drawings of the
existing drawings a company already has.
 It initially takes time to train staff on new software.