basic 3d drawings
DESCRIPTION
Faculty of Electrical Engineering. Lecture : En. Syahrom Bin Zakaria. Basic 3D Drawings. X - a positive value pointing to the right on the screen; Y - a positive value pointing up on the screen; and Z - a positive value pointing straight at the user in 3D space. - PowerPoint PPT PresentationTRANSCRIPT
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EC202 COMPUTER AIDED DESIGN
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BASIC 3D DRAWINGS
Faculty of Electrical Engineering
Lecture : En. Syahrom Bin Zakaria
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IMPORTANT 3D TERMINOLOGY
X - a positive value pointing to the right on the screen;
Y - a positive value pointing up on the screen; and
Z - a positive value pointing straight at the user in 3D space.
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THE POSSIBLE PLANES USE IN CAD DRAWINGS
Horizontal plane; Frontal plane; Profile plane; Oblique plane; and Inclined plane.
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POSITION OF UCS IN 3D
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UCS TOOLBAR
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TYPE OF 3D MODELS Wireframe; surface; and Solid
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WIREFRAME MODELING
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SURFACE MODELING
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SOLID MODELS
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METHODS OF CREATING 3D SOLID MODELS Extruding a 2D Object
Object in 2D view Object after Extrude
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REVOLVING AN OBJECT ABOUT A CYLINDRICAL AXES From the pull down menu select Draw
– surface – revolved surface as shown
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SELECT THE OBJECT TO BE REVOLVE AND DEFINE THE AXIS OF REVOLUTION
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FULL REVOLVE
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1800 REVOLVE
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USING THE BASIC PRIMITIVES
Can you name these primitive shapes?
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DRAWING OF 3D PRIMITIVES BOX
At World UCS UCS at X rotate 900
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BOX AT UCS Y ROTATE 900
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WEDGE UCS World
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WEDGE UCS X rotate 900
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WEDGE UCS AT Y 900 ROTATE
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CYLINDER UCS World
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CYLINDER UCS X 900 ROTATE
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CYLINDER AT UCS Y 900 ROTATE
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3D EDITING COMMANDS
BOOLEAN OPERATION
UNION
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SUBTRACT
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INTERSECT
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3D EDITING COMMANDS INTERFEREINTERFERE is an identifier command. It identifies (highlights) the area where two selections of 3D solids overlap and gives you the option to create a new 3D solid from the overlapping volume.
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FILLET AND CHAMFER Is similar to the command for 2D
drawings.
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CHAMFERING AN OBJECT For chamfering an
object as shown below, you must enter command “Chamfer”.
Select the distance of chamfering or angle in the command prompt (the example to you is a distance).
Select edge to be chamfer
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ENTER DISTANCE OF CHAMFERING
in this example:The 1st dist. is 20mm,2nd dist is 30 mm
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FILLET AN OBJECT
First enter the command “fillet”,
Enter the radius (20mm in example),
Select the the edge to be fillet,
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3DARRAY
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3D DRAW COMMANDS
SECTION
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SLICE
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USER COORDINATE SYSTEM (UCS) IN 3D UCS toolbar
WCS 3 point
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USING UCS 3 POINT
To draw a circle in an inclined surface Y.
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Specify new origin point; Specify point on positive X-portion; Specify point on positive Y- portion
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A circle is drawn on surface Y.
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WHAT IS SOLVIEW Solview is a command provide another
method of setting up orthographic views and it is superior to some of the options because it setup layers according to your named view. To implement solview, work in the multistep process:
1. Create a 3D solid modeling,
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CREATE THE 3D AS FOLLOW:
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CHOOSE LAYOUT 1 FROM THE BOTTOM OF DRAWING WINDOW AS SHOWN
Layout1 (layout tab)
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PAGE SETUP DIALOG BOX WILL APPEAR
Then, Click ok
Change paper size if necessary
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A 3D VIEW WILL APPEAR LIKE AS FOLLOW:
Delete this view first
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FROM HERE, ENTER “SOLVIEW” AT COMMNAD PROMPT.Command : solview (enter)
Enter an option [Ucs/Ortho/Auxialiary/Section]: Ucs (enter)
[Named/World/?/Current]<Current>: (press Enter) Specify view center<specify viewport>: (pick any
point, the top view will appear, then press Enter) Specify first corner of viewpoint: (use window to pick
the points.) Enter view name: top (press Enter)
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TOP VIEW WILL APPEAR FIRST
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TO CREATE THE FRONT VIEW Enter an option
[Ucs/Ortho/Auxialiary/Section]: ortho [Named/World/?/Current]<Current>: (press
Enter) Specify view center<specify viewport>: (pick
any point, the top view will appear, then press Enter)
Specify first corner of viewpoint: (use window to pick the points.)
Enter view name: front (press Enter)
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PICK FROM MIDPOINT AS SHOWN
Midpoint of border
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DRAG IT DOWN AS SHOWN
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THE FRONT VIEW WILL APPEAR AS SHOWN BELOW:
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TO CREATE THE AUXILIARY VIEW
Enter an option [Ucs/Ortho/Auxiliary/Section]: Auxiliary (select the front view)
Specify first point of the inclined plane: _endp of Specify second point of the inclined plane: _endp of
Specify side to view from: Specify first corner of viewport: (use window
to pick the points) Enter view name: Auxiliary (press Enter)
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Pick endpoint A and B
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After picking endpoint A and B
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SPECIFY THE VIEW CENTER:
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Command : pspace (press enter)
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Command: SoldrawSelect objects: All (press Enter)
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COMMAND: LAYER After soldraw, check the layer
control drop-down list as shown below:
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CHANFE THE PROPERTIES IN YOUR LAYER DIALOG BOX
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YOUR DRAWING WILL BE LIKE THIS
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PSPACE AND MSPACE COMMANDS
Pspace command are switch command that take you back to paper space from model space.
When you click layout tab you access paper space.
This 2d space allow you to print your drawing at a scale of your choice.
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MSPACE (MODEL SAPCE) Allow you to move from pspace into
model space area. Allow you to work on the 3d model in
your drawing
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CREATING ISOMETRIC VIEW BY USING SOLVIEW
The process is similar to creating orthographic and auxiliary view.
move from pspace into model space (mspace) area.
Select 3D View, then SE Isometric or other directions