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CAD 100; Introduction To Computer Aided Design ; 3 Credits
DESCRIPTION:
An emphasis will be placed on computer drafting; construction of straight and curved lines; orthotropic and axonometric views and sections; dimensions, tolerances, notes; as well as an introduction to the terminology associated with CAD. Basic computer operations involving move, copy, delete, and save are included, and the student will be exposed to drawing manipulation involving translation, rotation, zooming, panning, and windowing. Lecture, 2 hours; Laboratory, 3 hours. Preq. ME 105 or consent of instructor.
COURSE COMPETENCIES:
Upon completion of this course the student can:
1.Define the hardware used and the terminology associated with computer
aided design (CAD)
technology, comprehensively, and communicate
the same both orally and in writing.
2.Selectively fit an appropriate display, output, and input device(s)
to the CAD job undertaken.
3.Produce straight lines of varying formats and intensities at any
point, based on two or more
methods of positioning lines.
4.Construct standard curved lines - full circles, arcs, and concentric
circles - at all points required on
two-dimensional detail drawings.
5.Develop detail orthotropic and axonometric views as required.
6.Construct cross sections of various designs, with cross hatching
incorporated as desired.
7.Apply dimensions, tolerances, and alphanumeric notes to drawings.
8.Move, copy, delete, and save drawings or portions of drawings.
9.Use CAD to manipulate drawings by means of translation, rotation,
scaling, zooming, panning, and
windowing.
COURSE OUTLINE:
I. .INTRODUCTION TO CAD HARDWARE
A.Display Devices
1.The raster terminal
2.Vector storage
3.Vector refresh
4.Dual display
B.Input Devices
1.Keyboard
2.Digitizer or graphics tablet
3.Stylus
4.Puck
5.Mouse
6.Light pen
7.Joystick or bitstick
8.Thumbwheels
9.Programmed function board
C.Output Devices
1.Electromechnical pen plotters
2.Drum plotters
3.Flatbed plotters
4.Electrostatic plotters
5.Laser plotter
6.Ink jet plotters
7.Photo plotters
II..INTRODUCTION TO CAD SOFTWARE AND 2-D DESIGN-DRAFTING
A.Positioning of Points
1.Absolute and relative coordinates
2.Polar coordinates
3.Locking orthogonal and angular axes
B.Line Types
1.Straight lines
2.Regular curves (circles, arcs, fillets)
3.Dashed and phantom
4.Hidden
C.Line Values (Weight)
D.Projected Views
1.Orthographic
2.Axonometric
3.Dimensioning
E.Sections
1.Dimensioning
2.Cross hatching
F.Tolerances and Alphanumeric Notes
G.Creating and Storing Graphic Symbols for Later Use
H.Introduction to Drawing Manipulation
1.Translation
2.Rotation
3.Scaling
4.Zooming
5.Panning
6.Windowing
I.General Manipulation and Preservation of Drawing Elements
1.Move (views, sections, or entire drawings)
2.Copy (views, sections, or entire drawings)
3.Delete (views, sections, or entire drawings)
4.Save (views, sections, or entire drawings)
LABORATORY ACTIVITIES:
1.Familiarize students with laboratory rules and operations, and
identify and demonstrate the major
CAD hardware. Format diskettes and experiment
with standard DOS routines.
2.Load the CAD software, set parameters, page through the various
menus and screens, and obtain
assistance through the available help screens.
3.Explore the commands for positioning and drawing straight lines.
Use the commands to save, quit,
and end jobs, along with commands to define
orthographic directions, display grids, snap to a
grid structure or point, and move, copy, and
delete whole drawings.
4.Use commands to produce regular curved lines, such as full
circles, arcs, ellipses, and any other
regular curvilinear shapes provided through
the CAD software.
5.Combine straight and curved lines to produce a simple drawing;
then use techniques to redraw,
erase, backup (or delete) the last element
drawn, and recover elements previously deleted.
6.Experiment with drawing at angles to the normal orthographic
directions. Construct regular and
irregular polygons; close the shapes manually,
and with any automatic snap and close methods
provided with the software.
7.Use commands to change, alter, or modify, to move and copy
elements of drawings, and to
mirror image drawings or portions of drawings
that have symmetry.
8.Explore and practice the manipulation of drawings through various
commands to zoom, pan, view,
scale, rotate, translate, and window.
9.Provide a lab project to test the material covered to date.
10.Explore and use available CAD functions for producing alphanumeric
notes and in placing them
on drawings.
11.Dimension straight, curved and angular surfaces, and place
alphanumeric notes and tolerances on
or near the dimensions as required.
12.Review the comprehensive prerequisites to constructing a new
drawing; practice these setup
requirements, and implement the means of building
a library of graphic symbols for later use.
13.Experiment with thick lines, solid objects, and cross hatching.
14.Use straight lines and regular curves (of various weights
and types), along with solid objects to
produce a drawing for a specified component.
15.Complete the drawing of the specified component by including
certain associated orthotropic
and axonometric views and sections.
For questions about this page or to report problems, please contact Mike Binzer
Revised 7/26/04