Orthographic Projection
Technological Design
Mr. Wadowski
Orthographic &
Isometric
Drawing Lesson
TOPICS
Working Drawings,
Isometric Drawings &
Orthographic Drawings
Glass box concept
Multiview projection
Orthographic projection of point, line, plane, surface and object.
Line convention (The meaning of lines in Orthographic
Drawings)
TOPICS (continued)
Working Drawings
Scaled Drawings
Dimensioning
Drawing with a Miter
Line
Practice Worksheets
Working Drawings
The final stage of illustrating your solution is to prepare a set of technical illustrations called
Working Drawings.
This set of drawings contains all the information needed to build the product.
Orthographic Drawings
Used to show details of the front, top and right side views
Uses 3 views
Used to provide dimensions and special shapes by using different line types. For example object, hidden, and center lines. Draw the front first, top second, and right side last
Space the views out equally at 40 mm
A miter line is used to project details of the object from the top view to the right side view without measuring. Drawn at 45 degrees.
ISOMETRIC Drawings
Three dimensional (3d)
You can see how all three views fit together
All horizontal lines are angled at 30 degrees and vertical lines remain vertical
Hidden lines and dimensioning are not shown on Isometric drawings
Orthographic and Isometric
MULTIVIEW PROJECTION
Width
Depth
Adjacent view(s) is needed to fulfill the size description. Height
Height
… can be presented only two in each view.
Depth
Three principle dimensions of an object …
Width
Depth
TO OBTAIN MULTIVIEW
REPRESENTATION OF AN OBJECT
1. Revolve the object with respect
to observer.
2. The observer moves around the object. REVOLVE THE OBJECT
Top view
Front view
Right side view
OBSERVER MOVE AROUND
Top view
Front view
Right side view
THE GLASS BOX CONCEPT
Rear view
Left side
Mr. Wadowski
Orthographic &
Isometric
Drawing Lesson
TOPICS
Working Drawings,
Isometric Drawings &
Orthographic Drawings
Glass box concept
Multiview projection
Orthographic projection of point, line, plane, surface and object.
Line convention (The meaning of lines in Orthographic
Drawings)
TOPICS (continued)
Working Drawings
Scaled Drawings
Dimensioning
Drawing with a Miter
Line
Practice Worksheets
Working Drawings
The final stage of illustrating your solution is to prepare a set of technical illustrations called
Working Drawings.
This set of drawings contains all the information needed to build the product.
Orthographic Drawings
Used to show details of the front, top and right side views
Uses 3 views
Used to provide dimensions and special shapes by using different line types. For example object, hidden, and center lines. Draw the front first, top second, and right side last
Space the views out equally at 40 mm
A miter line is used to project details of the object from the top view to the right side view without measuring. Drawn at 45 degrees.
ISOMETRIC Drawings
Three dimensional (3d)
You can see how all three views fit together
All horizontal lines are angled at 30 degrees and vertical lines remain vertical
Hidden lines and dimensioning are not shown on Isometric drawings
Orthographic and Isometric
MULTIVIEW PROJECTION
Width
Depth
Adjacent view(s) is needed to fulfill the size description. Height
Height
… can be presented only two in each view.
Depth
Three principle dimensions of an object …
Width
Depth
TO OBTAIN MULTIVIEW
REPRESENTATION OF AN OBJECT
1. Revolve the object with respect
to observer.
2. The observer moves around the object. REVOLVE THE OBJECT
Top view
Front view
Right side view
OBSERVER MOVE AROUND
Top view
Front view
Right side view
THE GLASS BOX CONCEPT
Rear view
Left side