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00:00CBeebies in CBeebies HD
00:04Andy, Andy, I can't wait to show you what me and my cool gadget jacket have got today
00:09Oh, go on, tell me
00:10Well, you know you tell at the time and you use clocks and they're really big and they're heavy and...
00:15Well, look at this
00:16Ta-da!
00:18It's really small, it can go round your wrist, you can take it everywhere you go
00:21Look, look, look, look
00:22Yes, Alex, it's a watch
00:24Lots of people have got watches
00:25A watch, that's a great name for it, a watch
00:27Maybe Nina can inspire some ideas in brand new Go Digital
00:31But lots of people
00:39If you've got a question and you don't know where to go
00:42Ask Nina for some help, cause she's got a science show
00:45She makes sense of her senses by helping all her fans
00:48By doing her experiments with potions and with bags
00:51Touch her tongue
00:53Fingers
00:54Eyes, ears, nose
00:57Nose
00:58Nina and the neurons find out what you need to know
01:00Nina and the neurons find out what you need to know
01:03Look, he helps us with our eyes and Felix with our touch
01:06Ollie sniffs our smells and sounds and bells she hears so much
01:09But he's Ollie's brother, he helps us with our taste
01:12They're Nina's little neurons and they're coming to your place
01:15Touch her tongue
01:17Fingers
01:18Eyes, ears, ears, nose
01:21Nina and the neurons find out what you need to know
01:24Nina and the neurons find out what you need to know
01:27Oh, yeah!
01:30Oh, yeah, that's good
01:32Oh, hello there!
01:33I'm just in the middle of an experiment
01:35I'm trying out different ways of drawing a picture on my tablet
01:38And I think it's finally ready to print out
01:40Okay, print
01:41Oh, haha
01:48Hey!
01:50It's a picture of a flower
01:52It's amazing to think that I drew this in my tablet, isn't it?
01:56Oh, I hear a beep, I see a flash
01:58I wonder what they're going to ask
02:05Hi, Nina!
02:07Hi
02:08We've got a cracker for you
02:10How do 3D printers work?
02:13That's a great question
02:14How do 3D printers work?
02:17I'm always amazed how my own printer works
02:19But 3D printers are incredible machines
02:21Why don't you come down to my lab and we'll investigate
02:24See you soon, Nina!
02:26Bye!
02:27Bye!
02:29Well, I'm going to need some help to answer this one
02:31and I know just who to ask
02:33Okay, neurons, time to get to work
02:51Neurons at the ready, Nina!
02:54Okay, today's question is how do 3D printers work?
02:57Now, which neuron do you think will be most useful in helping us find the answer?
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05:28know those bunches anywhere can you see who it is yes it's me and here I am 3d printers are
05:44a
05:44brilliant invention and here are some other objects that have been created using a 3d
05:48printer just like my Nina model so how do you have a feel of that here's one for you Ethan
05:56hold it and feel it how does it feel hmm it's rather firm like plastic yes they are hard
06:07the printers that we normally use print with ink but 3d printers print with different materials
06:13like plastic or metal what things can a 3d printer make Nina that's a great question a 3d printer can
06:22make toys models of buildings test tubes puzzles lots of things now there are different types of
06:303d printers that work in different ways but all 3d printing is about adding layers so let's try and
06:37experiment I smell something fruity apples apples I love apples calm down bud we're not eating the apples
06:47just yet they're for the experiment so 3d printing is all about layers so let's see what happens when
06:54we layer up these apple slices let's go
07:09you're doing really well everyone so what have our layers created apple yes when we put all the layers
07:20together on top of each other we got a perfect whole apple just like this one and your apples
07:27not looking so perfect Nina oh you're right look what went wrong with my apple and middleware is
07:35actually supposed to go at the bottom you're right each slice of the apple is slightly different so they
07:40have to be layered in exactly the right order to make the whole shape let me just sort this
07:50there that's better and that's how 3d printers work they can create different objects by building up
07:56lots and lots of thin layers of material by building the layers in exactly the right order the 3d printer
08:03can make a complete shape but how does it make the layers Nina excellent question felix i've got another
08:10great experiment that will help to explain now this model is made up of lots of layers of plastic and
08:18the
08:18plastic layers started off as a liquid a bit like the paste in here so we're going to use this
08:25paste to
08:26make our very own 3d object like this pyramid so let's start with the bottom layer let's use the pink
08:35one
08:39the first layers are looking good let's pick up the white paste and we'll make the second layer but
08:45we'll make it a bit smaller than the bottom layer okay
08:54guess which one we use now wait the white one go for it
09:02hooray well done the layers have created beautiful pyramids well done experimenters your stripy pyramids
09:11are fantastic and now we just need to leave them so they can go hard like this one this is
09:17how 3d
09:17printers work liquid plastic creates the shape and the shape is left to harden how does the 3d printer
09:25know what shape the object should be Nina great question bell to find out we need to visit somewhere
09:32very creative indeed
09:38off we go for another adventure Nina said it's somewhere very creative maybe a music studio with
09:45drums
09:47or perhaps an art gallery none of those but it certainly looks interesting
09:56so your question was how do 3d printers work now there are different types of 3d printers but this
10:02one uses plastic how do you think the printer knows what to print the computer tells it Nina that's right
10:10the computer sends a message to the 3d printer but who controls the computer people that's right just like
10:19a regular printer that prints out letters and pictures it's people like us that tell the
10:24computer what to do and that's what we're about to do with a little help from Nikki hi Nikki hi
10:29Nina hi guys
10:30hi Nikki is going to help us make the perfect desk tidy now this is one from my lab but
10:39it doesn't work
10:40quite as well as i'd like it because it's not big enough oh to fit all my pencils and
10:52my ruler keeps falling out oh and worst of all this is where my rubber stays and i can't reach
11:00it
11:02i think we can make it work much better don't you yeah yeah and Nikki is going to help us
11:07make changes
11:08to the design on the computer so is everyone ready yeah okay what are we going to change first can
11:17we
11:18make the pens a bit wider no problem wow changing the design looks so easy now what can we do
11:27to make
11:29my ruler stop falling out higher great idea let's make it higher
11:37can we make a special place for the water please yeah of course we can
11:46well done experimenters we've designed our perfect desk tidy and now that it's been designed we can print
11:53it out as many times as we like so we can have one each hey what color would you like
11:58blue
12:00green oh and i think i'm going to have purple so thank you very much for your help nikki you're
12:05welcome nina let's get 3d printing
12:12look carefully and you'll see that the computer is telling the printer exactly where to put the plastic
12:17that is amazing that's a brilliant sound
12:22what do you think of your desk tidies experimenters great nina oh i'm so pleased
12:34so your question was how do 3d printers work and i think we've answered it 3d printing is used to
12:41print
12:41all kinds of objects different 3d printers use different materials it's all about building layers
12:49in the correct order to make a whole object first we create a picture of an object on our computer
12:57then the computer uses that information to tell the printer what to do so i hope that's answered your
13:04question thanks nina bye you're welcome bye
13:12if you want to know more about the science that's all around us go to the nina section on the
13:16cbb's
13:17website have fun go digital if you want to do it faster go digital if you want to do it
13:26better go
13:27digital if you want to do it faster go digital computers and technology help us every day
13:39making our lives easier in each and every way they help us understand things and make it very clear
13:47they make tricky tasks a piece of cake i like cake if you're trying to understand the world but the
13:56answer is
13:57invisible invisible is the power of computers switch it on switch it on switch it on go digital
14:08if you want to do it faster go digital if you want to do it better go digital
14:16if you want to do it faster go digital amazing technology is all around us making our lives
14:25faster and easier and giving us an even more exciting future so wherever you go and whatever you do
14:31remember to go digital see you again soon bye bye go digitals
14:40hi everyone do you want to play three two one when it comes to having fun with numbers one two
14:48three
14:49you can always count on the numbs we're here oh what fun that's really special the best ever so come
14:59and
14:59join them in their adventures i'll be waiting for num tums brand new episodes tomorrow at four on cbb's and
15:09cbb's hd
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