Technical Drawing Visual Communication of Technical Information

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Technical DrawingVisual Communication of
Technical Information
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Technical DrawingVisual Communication of
Technical Information

• Overview
• Review
• Orthographic projection
• Multi-view sketches
• Practice

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Isometric Projection
A standard method of 3-dimentional (3D) drawing
that shows similar detail on three adjacent sides
of an object.
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Complete

• The final isometric drawing presents three sides
  and infers information about the other sides

Horizon
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Orthographic Projection
A method of using several plane (2D) drawings to
present a 3D object.
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Example
Side
Front
Top or Plan
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In orthographic projection, the combined diagram
is known as a three-view.

• Front view the drawing obtained by observing
  the object in the front (The left-right
• X-axis is called width the up-down
• y-axis is called height.)
• Side view the drawing obtained by observing
  the object from one side (left or right)
  (The front-back z-axis is called depth.)
• Top or Plan the drawing obtained by observing
  the object from above

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A Real Example SHOES!
http//livvyrobertson.wordpress.com/
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Creating Orthographic Projections
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Front
Side
Top
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A detailed example
Hidden Line
FRONT
END
Hidden Line
PLAN
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Another example
Front
Side
Top or Plan
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An example made of cubes
Side
Front
Can you build the object? Can you draw an
isometric view of the object?
Top or Plan
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An example made of cubes
Side
Front
Top or Plan
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Orthographic Practice
Side
Front
Top or Plan
Isometric
Technical Drawing requires presenting 3-D objects
in 2-D form AND visualizing 3-D forms from 2-D
representations. Complete both worksheets by
drawing the orthographic or isometric views. You
may want to start by constructing each object
from cubes to help in visualizing.
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Multi-view Sketch
A standard set of drawings showing technical
details of an object. It consists of 3
2-dimentioal orthographic projections AND an
isometric projection.
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A Simple Example
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An Example
Orthographic Projections
PLUS
Side
Front
Isometric
Top or Plan
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A Better Example
Side
Front
Top
Isometric
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Multi-view Sketch Practice
The Advanced Practice worksheet includes the
orthographic drawings of several figures. All
have straight edges but none are cubes. Try your
hand at drawing the isometric view of each.
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Multi-view Sketch Practice
Side
Front
Example
Top
Top
Front
Side