OBLIQUE VIEWS

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OBLIQUE VIEWS

• Oblique drawings provide a quick way to sketch an
  object and represent the three dimensions of
  height, width and depth.
• Oblique drawings have only one receding axis.
  This axis can be drawn at any angle, but is
  typically drawn at a 30 or 45 angle.

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Cavalier Oblique

• Cavalier oblique drawings transfer the depth
  measurement from the orthographic projection
  directly to the receding axis in the oblique
  drawing.
• For an illustration, begin with the orthographic
  views of the object.

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Cavalier Oblique Step 1

• Step 1 - The overall rectangular shape is drawn
  with the depth measurement placed along the
  receding axis.

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Cavalier Oblique Step 2

• Step 2 - The rectangle or notch on the right
  hand side is drawn to show where the corner has
  been removed.

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Cavalier Oblique Step 3

• Step 3 - The rectangular notch on the upper left
  front corner is drawn.

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Cavalier Oblique Step 4

• Step 4 - The inclined surface on the upper right
  rear edge is located by marking the corners of
  the inclined surface and then connecting those
  corners to generate the angle.

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Cavalier Oblique Completed

• As you construct the oblique drawling, notice
  that surfaces that are parallel in the
  orthographic view remain parallel when
  transferred to the oblique drawing

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Cabinet Oblique

• A cabinet oblique drawing is constructed similar
  to a cavalier oblique drawing except the
  distances transferred along the receding axis are
  reduced by half.
• This reduces the exaggerated (or long) look of
  oblique drawings where the depth measurement is
  significantly greater in proportion to the height
  and width.

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Comparison ofCavalier and Cabinet Obliques
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Curved Surfaces

• When the curved edges of cylindrical features and
  holes appear circular in the front face of the
  object, the radii and diameters can be
  transferred directly to the appropriate face in
  the oblique drawing.

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Curved Surfaces Step 1

• Step 1 - Begin the oblique drawing with light
  construction lines for the rectangular base plate
  and rear vertical plate.

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Curved Surfaces Step 2

• Step 2 - The two circles representing the curved
  top of the vertical rear plate are drawn in both
  the front face and rear face.

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Curved Surfaces Step 3

• Step 3 - The light diagonal line that goes from
  the center of the circle to the upper left corner
  in each face defines the point of tangency for
  the line that represents the edge of the curved
  surface on the upper left side.

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Curved Surfaces Step 4

• Step 4 - Since the circles representing the hole
  do not overlap in the cavalier oblique, you will
  not see the edge of the rear hole. Only the
  circle representing the front edge of the hole is
  drawn with a visible line.

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Comparison ofCavalier and Cabinet Obliques