This presentation introduces teenagers to the world of Computer Aided Design (CAD) programs/websites, and allows them to understand how 3-D printers can be implemented into their 21st century learning styles and global expectations.

1. 3D Printing….
For the Win!

2. What we’ll cover….
• What is 3D Printing and what are it’s applications?
• Types of 3D printing
• What is CAD software?
• Getting Started!

3. What is 3D Printing?
3D printing is the process of taking a digital model and making it a physical object. When you
write a document on your computer, you create a digital version, then press” Print” to create a
physical copy. 3D printers work the same way, with one more dimension.
Unlike a traditional subtractive manufacturing process, in which an object is carved out of a
piece of material, 3D printing is an additive manufacturing process in which an object is built
over time by stacking layers of material directly on top of each other. These layers fuse together
to create 3D printed objects.

4. Types of 3D Printing Technologies
(This isn’t all of them! Yikes!)
Stereolithography (SLA)
Digital Light Processing (DLP)
Fused Deposition Modeling (FDM)
Selective Laser Sintering(SLS)
Selective Laser Melting(SLM)
Electronic Beam Melting (EBM)
Laminated Object Manufacturing (LOM)

5. Sterolithography (SLA)
 Oldest method in history of 3D printing.
 Still being used today
 Involves a uniquely designed 3D printing machine
called a sterolithograph apparatus, which converts
liquid plastic, or photopolymers, into solid 3D
objects via a laser.
 ideal solution for creating prototypes because it
creates highly accurate, durable objects fairly
quickly and relatively inexpensively.
 Used from medical to manufacturing for
prototypes and sometimes final products.
 Example: Car manufacturer might make a
prototype of a door handle to test and perfect
and then use perfected prototype as a
template for mass production.

6. Digital Light Processing (DLP)
 Very Similar to SLA, and works with
photopolymers
 Uses a more conventional light source ,
such as an arc lamp (a light that uses an
electric arc to produce light)
 Much faster than SLA as each layer is
done a one time.
 Use is similar to SLA

7. Fused Deposition modeling (FDM)
 Involves extruding a
thermoplastic material in
millimeter thin layers to produce
an object.
 As each layer is extruded it bonds
with the previous layer.
 Requires support material for
overhanging geometry
 This is what we’ll be using!
 Popular with hobbyist. Most
popular for consumer use.
 Also used by industries such as
automobile, medical, and food
industries

8. Terms You Should know
FDM: Fused deposition modeling, the 3D printing technology used by MakerBot.
Slicing: The Act of turning a digital 3D model into thin layers used for 3D printing
Filament: Material used to build your 3D prints
Extruder: The “hot glue gun” of your 3D printer; it uses filament to draw out the layers of your 3D prints
Build plate: Surface on which prints are built

9. Selective Laser Sintering (SLS) / Selective Laser
Melting (SLM)
 Like STL uses a laser as the power source to
form solid 3D objects
 Main difference between SLS and SLA is that
SLS uses powdered material in the vat instead
of liquid resin as SLA does.
 Doesn’t not require support structure as the
object being printed is surrounded by powder.
 SLS can be used with a variety of materials
like plastics, glass, ceramics. Just enough
power to fuse the powder together
 SLM actually melts the powder into one
homogenous part. Often used with pure
metals.
 Used mostly in manufacturing with SLM used
primarily in aerospace and medical orthopedics

10. Electronic Beam Melting (EBM)
 Similar to SLM
 Uses an electron beam to melt metal
powder together instead of laser.
 Carried out under vacuum conditions
 Makes a solid piece so is favorable for
medical industry (implants), and
other hi-tech sectors such as
aerospace and automotive.
 Mainly used for medical implants and
aerospace.

11. Laminated Object Manufacturing (LOM)
 LOM printers use continuous sheet
coated with an adhesive, which is laid
down across substrate with a heated
roller that melts adhesive bonding
layers of material.
 Laser or Knife is then used to cut out
design.
 The layer/ cutting process continues
until object is finished.

12. Question:
What are some common themes among 3D
printing types?

13. CAD software…. What is that? Cat Ate Dog? Gross
 Computer Aided Design
 Used to make 3D blueprints in a 2D space. (What does that even mean?)
 What is 2D?
 What is 3D?

14. Let’s Get Started!
 Go to www.tinkercad.com
 Click Sign Up

15. Now it’s time to learn… Click it! (we know you
want to….Learn…. Click “LEARN”)

16. It’s time to be Basic… (You have to be basic before
becoming complex…. Or something like that)

17. Homework…
(Really?! I didn’t sign up for that!)
(It’s painless… We promise…. Or do we?…)
 If you have computer access at home….
 Continue to explore Tinkercad (maybe even take a few more of the lessons!).
 Think about what you want to create tomorrow.
 Can’t be any larger than 8cm x 8cm
 Check out Thingiverse for inspiration

18. 3D Printing
Day Two
Time to get creative… anyone up for becoming a 3D printing Shakespeare?

19. First Login to Your Tinkercad Account…. And
then…

20. Rename that project!

21. “I can make whatever I want?! I’m Building a City!”
That’s Awesome!... But first….
Just a few Rules… Whomp
Project cannot be larger than 8cm x 8 cm
Projects must be library appropriate.
Projects may be scaled down if deemed necessary for printing speed.

22. When can I get my creation?
We will be displaying your creations for one week at the branch
where you are attending this camp. After that, we’ll be calling you
to come pick up your creations!
(Psss… Make sure we have your contact information… we have
a contact sheet available!)