# Introduction to Engineering Introduction to CAD - PowerPoint PPT Presentation

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## Introduction to Engineering Introduction to CAD

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### Introduction to Engineering Introduction to CAD Agenda Introduction to Computer Aided Drafting Reference Design and 3-D Modeling IGCE Chapter 6, pg 159 - 169 – PowerPoint PPT presentation

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Title: Introduction to Engineering Introduction to CAD

1
• Agenda
• Introduction to Computer Aided Drafting
• Reference
• Design and 3-D Modeling
• IGCE Chapter 6, pg 159 - 169
• The CADKEY Project Book, 5th Edition- Chapter 1

2
Agenda
• Introduction to CADKEY getting familiar with
• Creation of CADKEY Part file
• Creation of blank seed drawing
• Creation of title block pattern file

3
CAD Computer Aided Design (and Drafting)
• CAD model is a computer representation of an
object or part. It is a virtual part.
• The model is an engineering document of record.
• CAD programs are a means to develop a model, they
and more.

4
Simplest model in CAD is 2-D Model
• Computer graphics equivalent to an orthographic
projection created by hand.

5
2 ½ - D Model
• Third dimension by extrusion of 2-D
• Not very useful, very limiting

6
3-D Model
• CAD software electronically stores the entire 3-D
shape of the object.
• 3-D drawings can be generated from a 2-D model by
the program

7
Example Wireframe 3-D Model
8
Example 3-D Surface Model
9
Solids Modeling
• Most sophisticated method has volume as well as
surfaces and edges

10
Working with CADKEY in the lab
• If the floppy disk is full, CADKEY does not warn
while saving. It saves it as a 0 KB file. The
file can no longer be used
• Follow the instructions in the project book in
order.
• Dont skip around you may miss something
important!
• Try to complete the assignments in class.

11
• As set up for this class Color of line implies
weight of line when printed (plotted) out.
• Conventions are
• .75 mm Visible Green (1) or Yellow (4)
• .35 mm Hidden or Lettering Cyan (5)
• .35 mm Centerlines Magenta (6)
• .35 mm Dimension Section Magenta (6)
• Always, ALWAYS, print through PRINT PREVIEW
• Print black and white if on a printer outside of
class.

12
• Changing Print from portrait to landscape
• File
• Print/Plot Setup
• (choose orientation) Landscape OK
• Printing through Print/Preview
• File
• Print/Plot Preview
• Print Range (use default of all and one copy)
OK
• Scale (10 smaller that default value OK
• Accept (to Autocenter)
• Print

13
• To configure computers outside classroom to print
green yellow lines .7mm thick and cyan
magenta lines .35mm thick
• Click on TOOLS OPTIONS PRINT
• In dialog box, type .07 for green yellow, and
.035 for cyan magenta
• Click OK

14
Todays Assignment
• Work through Exercises of Chapter 1 The CADKEY
User Interface
• Take each step in order.
• Do as much as you can today and finish tomorrow.