fundamentals of engineering isometric pictorials and ellipses gsmst
TRANSCRIPT
![Page 1: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/1.jpg)
Fundamentals of Engineering
Isometric Pictorials and EllipsesGSMST
![Page 2: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/2.jpg)
2
Objectives
Projections: The Four Basic TypesCreating Isometric sketchesSketching Ellipses
![Page 3: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/3.jpg)
3
Projections: Four Basic Types
Orthographic Projections
Axonometric
Oblique Perspective
Pictorials
Note: Isometric is a special case of Axonometric
![Page 4: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/4.jpg)
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
![Page 5: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/5.jpg)
5
Making an Isometric Sketch
• Defining Axis
30o 30o
60o60o
Isometric Axis
![Page 6: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/6.jpg)
7
Usage of the Grid Paper
Correct orientation Incorrect orientation
Note the alignment of the axes
![Page 7: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/7.jpg)
8
Going From Isometric to Rectilinear
![Page 8: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/8.jpg)
9
Object for Practice
![Page 9: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/9.jpg)
10
DepthWidth
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
![Page 10: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/10.jpg)
11
Blocking in the ObjectBegin with Front Face
Front Face
Height
Width
![Page 11: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/11.jpg)
12
Blocking in the Object: Add Side
Face
Height
Depth
Side Face
![Page 12: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/12.jpg)
13
Blocking in the Object: Add Top Face
Top Face
![Page 13: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/13.jpg)
14
Adding Detail Cut Outs – Part 1
![Page 14: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/14.jpg)
15
Adding Detail Cut Outs – Part 2
![Page 15: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/15.jpg)
16
Adding Detail Cut Outs – Part 3
![Page 16: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/16.jpg)
17
Darken Final Lines - Part 4
Note: All visible edges will be darkened
![Page 17: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/17.jpg)
18
Draw the Isometric
• Use Isometric Grid Paper• Block is 6 x 3 x 3
![Page 18: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/18.jpg)
19
Isometric View
![Page 19: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/19.jpg)
20
Draw the Isometric
![Page 20: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/20.jpg)
21
Draw The Isometric
![Page 21: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/21.jpg)
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
![Page 22: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/22.jpg)
23
Isometric ellipsesIn an isometric drawing, the object is viewed at an angle, which makes circles appear as ellipses.
Holes
Cylinders
![Page 23: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/23.jpg)
24
Ellipses Can be in Any of Three Planes
![Page 24: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/24.jpg)
25
Sketching an Isometric of a Hollow Pipe
![Page 25: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/25.jpg)
26
Step 1 – Creating the Base Box
Diameter
Diameter Length
![Page 26: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/26.jpg)
27
Step 2 – Ellipse on Front Face
Lines to Tangent Points
- Lines to tangent points
- Corner to corner to get center
Tangent Points
![Page 27: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/27.jpg)
28
Step 3 – Ellipse on Front Face
Tangent Points
Sketch in Arcs
![Page 28: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/28.jpg)
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
![Page 29: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/29.jpg)
30
Step 4 – Ellipse for Hole on Front Face
Create Box for Hole
Sketch Ellipse
![Page 30: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/30.jpg)
31
Isometric of Hollow Pipe
![Page 31: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/31.jpg)
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
![Page 32: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/32.jpg)
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°
120°120°
60° 60°
240°
60°90°
![Page 33: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/33.jpg)
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
![Page 34: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/34.jpg)
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
![Page 35: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/35.jpg)
36
Tips for Pictorial ViewsIn 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.
![Page 36: Fundamentals of Engineering Isometric Pictorials and Ellipses GSMST](https://reader033.vdocuments.mx/reader033/viewer/2022061305/551443f75503466d1a8b594e/html5/thumbnails/36.jpg)
37
In Class Assignment
Use Isometric Sketch Paper (ISP)