Presentation is loading. Please wait.

Presentation is loading. Please wait.

Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST.

Similar presentations


Presentation on theme: "Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST."— Presentation transcript:

1 Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST

2 2 Objectives Projections: The Four Basic Types Creating Isometric sketches Sketching Ellipses

3 3 Projections: Four Basic Types Orthographic Projections Axonometric ObliquePerspective Pictorials Note: Isometric is a special case of Axonometric

4 4 Introduction to Isometric Projection Isometric means equal measure All planes are equally or proportionately shortened and tilted All the major axes (X, Y, Z) are 120 degrees apart CUBE

5 5 Making an Isometric Sketch Defining Axis 30 o 60 o Isometric Axis

6 6 Width Depth Height Isometric Axis Convention Making an Isometric Sketch Axis Convention Front view Choose the longest dimension to be the width or the depth for optical stability

7 7 Usage of the Grid Paper Correct orientation Incorrect orientation Note the alignment of the axes

8 8 Going From Isometric to Rectilinear

9 9 Object for Practice

10 10 Depth Width Height Isometric Axis Convention Making an Isometric Sketch Axis Convention Front view Choose the longest dimension to be the width (or the depth) for optical stability

11 11 Blocking in the Object Begin with Front Face Front Face Height Width

12 12 Blocking in the Object: Add Side Face Height Depth Side Face

13 13 Blocking in the Object: Add Top Face Top Face

14 14 Adding Detail Cut Outs – Part 1

15 15 Adding Detail Cut Outs – Part 2

16 16 Adding Detail Cut Outs – Part 3

17 17 Darken Final Lines - Part 4 Note: All visible edges will be darkened

18 18 Draw the Isometric Use Isometric Grid Paper Block is 6 x 3 x 3

19 19 Isometric View

20 20 Draw the Isometric

21 21 Draw The Isometric

22 22 Sketching a Circle Draw a square whose sides are the diameter of the circle. At the center of each side define the point of tangency for the circle. Draw the diagonals of the square. Orient the paper so you can draw equal arcs to construct the circle

23 23 Isometric ellipses In an isometric drawing, the object is viewed at an angle, which makes circles appear as ellipses. Holes Cylinders

24 24 Ellipses Can be in Any of Three Planes

25 25 Sketching an Isometric of a Hollow Pipe

26 26 Step 1 – Creating the Base Box Diameter Length

27 27 Step 2 – Ellipse on Front Face Lines to Tangent Points - Lines to tangent points - Corner to corner to get center Tangent Points

28 28 Step 3 – Ellipse on Front Face Tangent Points Sketch in Arcs

29 29 Step 3 – Ellipse on Back Face and Profile Draw Tangent Lines for Profile Complete Visible Part of Back Ellipse Repeat for ellipse on rear face

30 30 Step 4 – Ellipse for Hole on Front Face Create Box for Hole Sketch Ellipse

31 31 Isometric of Hollow Pipe

32 32 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

33 33 Review Questions 1._______ sketches present the object in a single view, with all three dimensions represented 2._______ sketches present the object in a series of projections, each one showing only two of the objects three dimensions 3.Which among the following is NOT an isometric axes (Hint: Use the Isometric Grid paper for reference)? a) b) d) c) 120° 60° 240° 60° 90°

34 34 Follow Sketching and Text conventions. 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 Tips for Drawing Assignments

35 35 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 Drawing Assignments

36 36 Tips for Pictorial Views In pictorial views, hidden lines are not shown unless absolutely required for clarity, such as; 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.

37 37 In Class Assignment Use Isometric Sketch Paper (ISP)


Download ppt "Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST."

Similar presentations


Ads by Google