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Isometric Pictorials. Goals Creating an isometric sketch. Introduction to Projections Four Basic Types. Note: An Isometric is special case of an Axonometric. Orthographic Projections. Axonometric. Pictorials. Oblique. Perspective. Introduction to Isometric Projection. CUBE.

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isometric pictorials

Isometric Pictorials

Goals

Creating an isometric sketch

introduction to projections four basic types
Introduction to ProjectionsFour Basic Types

Note: An Isometric is special case of an Axonometric

Orthographic Projections

Axonometric

Pictorials

Oblique

Perspective

introduction to isometric projection
Introduction to Isometric Projection

CUBE

  • The term Isometric literally means equal measure
  • All planes are equally or proportionately shortened and
  • tilted
  • All the major axes (X, Y, Z) are 120 degrees apart
slide4

60o

60o

30o

30o

Isometric Axis

  • Making an Isometric Sketch
  • Defining Axis
slide5

Height

Width

Depth

  • Making an Isometric Sketch
  • Axis Convention

Choose the longest dimension to be the width (or the depth) for optical stability

Front view

Isometric Axis Convention

slide6

Height

Depth

Width

  • Making an Isometric Sketch
  • Axis Convention

Choose the longest dimension to be the width or the depth for optical stability

Front view

Isometric Axis Convention

usage of the grid paper
Usage of the Grid Paper

Correctorientation

Incorrect orientation

Note the alignment of the axes

slide10

Front Face

Height

Width

Blocking in the Object

Begin with Front Face

slide11

SideFace

Height

Depth

Blocking in the Object

Add Side Face

slide12

Top Face

Blocking in the Object

Add Top Face

slide13

Adding Detail

Cut Outs – Part 1

slide14

Adding Detail

Cut Outs – Part 2

slide15

Adding Detail

Cut Outs – Part 3

slide16

Darken Final Lines

Part 4

Note:

All visible edges

will be darkened

sketching a circle
Sketching a Circle
  • Draw a square whose sides are the diameter of the circle.
  • 2. At the center of each side define the point of tangency for the circle.
  • 3. Draw the diagonals of the square.
  • 4. Orient the paper so you can draw equal arcs to construct the circle
isometric ellipses
Isometric ellipses
  • In an isometric drawing, the object is viewed at an angle, which makes circles appear as ellipses.
  • Holes
  • Cylinders
step 2 ellipse on front face reference technical graphics section 4 2 7

- Corner to corner to get center

- Lines to tangent points

Tangent Points

Lines to Tangent Points

Step 2 – Ellipse on Front Face(Reference Technical Graphics, Section 4.2.7)
step 3 ellipse on back face and profile

Repeat for ellipse on rear face

Draw Tangent Lines for Profile

Complete Visible Part of Back Ellipse

Step 3 – Ellipse on Back Face and Profile
summary
Summary
  • Technical drawings are an effective communication media
  • Projections of various types can be used
  • Isometric projections and creating isometric sketches has been introduced
  • Assignments will emphasize simple isometric sketches
review questions
Review Questions

b)

c)

d)

a)

120°

60°

60°

90°

60°

120°

120°

240°

  • _______ sketches present the object in a single view, with all three dimensions represented
  • _______ sketches present the object in a series of projections, each one showing only two of the objects’ three dimensions
  • Which among the following is NOT an isometric axes (Hint: Use the Isometric Grid paper for reference)?
slide29

Tips for Drawing Assignments

  • Follow Sketching and Text conventions from the reading assignment
  • Refer to reading assignment to clarify questions
  • Title Information is required. Avoid labels on the sketch.
  • Leave the construction lines – MUCH lighter and thinner than the finished lines
  • Include centerlines on isometrics
slide30

Tips for Drawing Assignments

  • Do not try to shade drawing – this is not a pencil sketching class.
  • Use grid paper. Try to sketch along grid lines. Practice sketching straight lines and curves on a grid sheet.
tips for pictorial views
Tips for Pictorial Views
  • In pictorial views, hidden lines are not shown unless absolutely required for clarity
    • Non-visible bottom of a blind hole
    • Important feature of object not in direct view
  • In pictorial views, holes or notches without bottom/end visible should be assumed to go completely through the object.
  • Centerlines are to be shown on all isometric pictorials.
in class assignment
In Class Assignment
  • Drawing 9: TG 2.23, 2.31, 2.37, & 2.38 in course packet
    • Use Isometric Sketch Paper (ISP)
assignments
Assignments
  • Refer to daily assignment list