Introduction to Axonometric

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Introduction to Axonometric Projection
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Axonometric Projections
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Isometric Projection vs. Sketch
Isometric projections are foreshortened because
the object is tipped with respect to the viewing
plane. Isometric sketches are not usually
foreshortened because they still appear
proportionate when showing the dimensions full
size along isometric axis lines. It is easier
just to sketch the full dimension.
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Step by Step Isometric Sketching
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Locating Features
To locate a feature such as the upper block, make
measurements from an existing corner as shown
here.
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Inclined Surfaces in Isometric
Inclined surfaces can not be measured along
inclined lines in an isometric sketch. To locate
inclined surfaces you must make measurements
along the isometric axis lines.
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Circles in Isometric

• Circles appear as ellispses when drawn in an
  isometric sketch.
• To sketch an isometric circle, locate the center
  and then sketch the box that would enclose the
  circular shape. Draw the ellispse tangent to the
  lines of the box.

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Arcs in Isometric Sketches
Arcs are usually sketched by locating their
centers and then boxing in the enclosing
parallelogram. Sketch the arc tangent to the
enclosing box, which is drawn along isometric
lines.
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Hidden Lines
Hidden lines are not usually shown in isometric
sketches unless they are needed to show a feature
that would be unclear. Usually the orientation
for the isometric drawing should be chosen so
that hidden lines arent needed. Holes are
assumed to go completely through the object
unless their depth is indicated with a note or
with hidden lines.
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Steps for Creating an Isometric Cylinder

• Construct the Rhombus Boundaries

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