3D printing is rapidly making its way to the desktop of every designer, engineer, scientist, and artist in the world. To inspire and prepare students to work in these industries, classrooms and labs at all levels are beginning to incorporate 3D printing into curricula, workshops, and research.
2. What is CAD?
Computer Aided Design
Traditionally “Engineering”, technically
applies to all design work created using
a computer
Uses: Paintball guns, cars, video game
characters
CAM - Computer Aided
Machining/Manufacturing
Three types of modeling; poly modeling,
curve modeling (related to parametric
modeling), and sculpting
3. History of CAD
Earliest users: Aerospace & Automotive
First graphic system developed by MIT’s
Lincoln Lab for USAF in 1950
Originally grew from 2D Drafting
Traditionally split into “Engineering/ Design”
and “Computer Graphics”
In Engineering/Design: Dassault Systems
(SolidWorks), Autodesk (Fusion 360,
Inventor, AutoCAD), Siemens (NX), ANSYS
(SpaceClaim), PTC (Pro/Engineer),
In Computer Graphics: Autodesk (Maya, 3DS
Max) , Luxology/The Foundry (modo, others),
Maxon (Cinema 4D)
Further Reading:
Marian Bozddoc's History of CAD
CAD Software History
4. What’s a 3D model made of?
Model & Render Credit: “Sub-D/Polygon Cockpit” by Jordan Pelovitz
6. Model Credit: “Reversys Boat” by Studio Oxyde http://www.reversysboat.com/
Model Credit: “Alias Modeling Training” by Benjamin Baron
https://www.behance.net/Ben_Baron
Example Software
NURBS
(Non-Uniform Rational B-Splines)
7. Model Credit: “Volcatron” by Rouhollah Toghyani
www.toghyani.com
Model Credit: “Sombreuil” by Joffrey Ferrandes
https://www.artstation.com/artist/joffrey_ferrandes
Example Software
Polygons/Sub-D
8. VoxelShop by
BlackFlux Software
Model Credit: C. D. Werner, F. B. Sachse and O.
DösselInstitute of Biomedical Engineering,
University of Karlsruhe, 76128 Karlsruhe, Germany
Model Credit: AlchemistID, 3D Coat ForumsImage Credit: Microsoft
Image Credit: Wikipedia
Voxels
Example Software
9. Why use solids?
Easy to avoid common model errors (Model
will always be “watertight”)
Easy to calculate volumes.
Leads to Parametric Solid Modeling, which is
used by professional designers & engineers.
10. Why learn 123D Design?
Best interface from Autodesk.
It’s free.
Easy to learn, good place to start for
3D Printing & Solid Modeling.
11. The Basics
CAM: Computer Aided Manufacturing
CNC: Computer Numerical Control
gCode - Programming language for
CNC cutters & 3D Printers
Before CNC, there was manual control
& still is!
12. FDM
Fused Deposition Modeling
3D Printers: Cheap, moderately accurate,
easy to make & maintain
Properties: Tough parts with visible print
lines, ABS/PLA Plastic
