Hi. 3D printing
is not a new concept. In fact, 3D printers
have been around for ages. Let me show you! We are the 3D printers. 🎵 🎵3D printers,
3D printers🎵 🎵All we are is 3D printers!
Everything is 3D printers!🎵 3D printing is quite easy. You keep putting blocks on top of each other
until you’re done. A simpler technique
they use in 3D printing is that they lay down a liquid
that dries very fast, so they can lay down
more liquid on top of it, which, again, dries fast,
so they can keep building up. These machines are
very much exactly almost like a hot-glue gun. The heating elements
melts the matter— [Pain, profanity] Who plugged it in?! The 3D printer head
also gets super hot, and melts the material that’s called
“filament” in 3D printing. The melted material comes out of the head
and dries very quickly. Whoa, whoa!
[Profanity] Okay, let’s do some 3D printing
with the hot-glue. [Blowing] To speed up cooling, I have to put
very thin layers of glue and constantly blow on them. Also, I have to run very slowly,
to let the glue dry, before I can build the next layer
on top of it. [Extreme blowing action] So dizzy… Shouldn’t have blown so— [cough] [Swallowing dry] I had a fan! And it’s done. Just took me
4 hours of gluing and a thousand
cubic metres of air blown. I guess this piece of art
belongs on eBay now. Maybe I can make enough money
to buy a 3D printer. Or maybe I should just ask
for free 3D printer! Hmm… Hi.
Say hello to my new 3D printer— [The sound of free 3D printer
without sponsorships] That’s cool. My precious! Well, great!
We can actually study a real 3D printer. I’ll talk about 3D printing
in more detail in my website. But for now, let’s print something.
What should we print? I know!
I’m gonna make a bomb! [Spooky creaky door noise] I have designed some rockets
using SketchUp. For my charge, I’m gonna use
a secret component, which is a 10 microfarad,
16 volts electrolytic capacitor. We know if we exceed the rated voltage,
it’s gonna blow up. I connect the capacitor to a cable that connects 120 volts
to the capacitor through a push-button. Super dangerous!
Don’t try it at home! Let me demonstrate.
If I plug it in to the power [Profanity] There are normally closed switches
and normally open switches. We need a normally open switch. The 3D printer’s printing now. You can see that some parts
of the 3D printer are 3D-printed themselves. This shows how strong
the printed parts can be. The 3D printer uses
three stepper motors to move in X, Y and Z directions. Printer has a bed
that moves in Y direction and the head itself
moves in X and Z directions. 🎵The old McDonald had a farm
E-I-E-I-O!🎵 🎵And in his farm he kept some bombs
E-I-E-I-O!🎵 🎵And a boom-boom here
And a boom-boom there🎵 🎵Here, boom! There, boom!
Everybody boom-boom!🎵 🎵Old MacDonald had a farm
E-I-E-I-O!🎵 Okay. These are my rockets. And this is my trigger. [Whizz] I just place the charge in my rocket and we are ready to go! 🎵 [🎵Marriage music] Seriously?! (Launching in 3…) (2…) (1…) (Zero!) [Capacitor explodes] (Uh…) (Houston, we have a problem.) [Explosion]