Lesson video

So hello and welcome to today's lesson with me, Mr.Telfer.

Probably your favourite teacher, who knows.

Now, if you had me in your classroom you'd love me, I promise you.

But anyway, today's lesson we're going to be looking at, exploded drawings.

And we've got a bit of a practical in there as well.

That it might sort of help in the screen in the beginning.

I'm going to talk to you about that as well later on.

For the theory part of the lesson, you will need your exercise books to just jot down some notes.

Something to write with and for the drawing task.

You will need your pencils.

Maybe some colouring crayons pencil, colouring pencils.

You could get in that model though.

And preferably if you've got a 30 degree set square as well, that'll be fantastic.

If you haven't, we can work around it.

But, I prefer you'd have one.

What we are going to be exploring today is different drawings in the industry.

So we going to have a quick talk about this different steps of drawings.

We're going to do a disassembly, which is a bit of a practical.

And we go into look into some exploded drawings as well, okay.

The key words for today's lessons, technical drawings.

You've heard me say a few times already.

So that's a precise and detailed drawing of an object, mhmm.

An exploded drawing.

So that is a technical drawing is this type of drawing, where all the parts are separated.

It shows them all in different parts like an explosion.

Poof! Can get it? Poof! Exploded drawing.

So now what we're going to do is look at three different types of technical drawing.

Now let's have have a start introduction to them.

You might know some of them, you might not know.

But it's going to be a quick little bit of learning and then we're going to progress.

So these are our three types of drawing.

We've got Orthographic, CAD and Exploded.

Now you may have never seen an orthographic before, but the easiest way I can explain that to you.

It is a 2D drawing, of a 3D shape, where you can see several planes or faces on one page at the same time.

So if I explain that to you, that's a sharpener.

You can see the front of it, the side of it.

Actually I should have got a sharpener in my hand.

The front of it, the side of it, and the top of it all at once.

Now, some orthographic pictures could have a lot more views.

They might show the back as well or the bottom, if there's relevant, detail and information there.

And also all sides are visible on the page at the same time.

It's not bad eeh? Now CAD, if you do my previous lesson, you should know what CAD stands for.

Shout it out for me quick.

Yap, Computer Aided Design.

And if you haven't done my previous lesson, go back and do it.

It's not a bad lesson, it's all right.

So Computer Aided Design.

And I know we've spoke about it before and you can know some advantages and disadvantages.

I was using programmes such as Tinkercad, okay.

And the last one is an exploded drawing.

Say it with me, exploded drawing, poof!Okay.

Now you can see it's still the same sharpener but the body, the blade and the screws are all separate.

If you look at where the screw is, it's inline with its hole.

Which is in line with the hole in the body of the sharpener.

So everything's aligned, okay.

So when you exploded a drawing you have to make sure certain things are aligned.

So we have to understand or communicate how things are meant to go together.

Does that make sense? I hope it does.

So what I want you to do now is start thinking about any advantages or disadvantages to do with drawing techniques.

Oh, I want you to pause the video, write a list of advantages and disadvantages for each drawing.

And then when you come back we'll just go over a few answers.

Not all of them cause there's so many.

See what we've got and then we'll progress.

See you in a moment.

So welcome back.

So the first one we're going to look at is a CAD drawing.

Now we'll keep this one quick, because we've done this before.

But CAD drawings, some of the advantages are that we can save time because it's so quick.

If you use it correctly, it can be a very quick process.

So you it can save your time.

Easy the edit.

You know, wherever I need to copy and paste is going to be a lot quicker than me trying to draw to another twice.

Decreases human error, that's to do with accuracy.

So these programmes can be so precise to fractions of a millimetre.

That I couldn't do by hand or by eye.

I'm super but I'm not that super, okay.

And it's easy to share as well.

So I could then produce my products on CAD, attach to an email or drop it into the Cloud and share it with whoever needs to see almost instantly.

Rather than me having to put it in a printer put it in a backpack, ride down the road.

Oh, it's not that, okay? So those are some advantages of CAD.

Whereas the disadvantage, you can lose your data.

Now, I've been having problems with my laptop the last couple of weeks.

My gosh! It's been a my, but yeah.

I've definitely lost some data, not cool.

That is one of the disadvantage of using CAD, okay.

Now, if you was working in a big company you might get hacked 'cause people might want your ideas.

And also training, you know training can take time.

I say, it's easy to learn the basics, but once you go beyond that.

Though you might need a specialist training could take you a long time and software updates.

Now some programmes become obsolete.

When I was in uni, I mean you're probably not interested.

But when I was in uni the programmes I was taught, when I left uni, weren't even being used at industry no more.

Big yes, so yeah.

You need to update yourself on the training, on the software.

You might need a new package that companies use or industry's is using.

So you have to stay current, move with the times in the course.

These programmes aren't cheap, you know.

They could cost you a pretty penny.

So bit of a disadvantage there, but beautiful work when it's done.

Now, an exploded drawing, which is the ones we are going to be focused on more today.

And the advantage of that, is clearly that it shows how things fit together.

So, you know helps the user understand how things fit together.

And the details can be seen and they are not hidden.

Now, if you look at the sharpener.

Think about sharpener, where the blade goes.

You'll see, there's a ledge on the inside, where the blade sits on.

Now, looking at the sharpener, you'll never see that edge blade.

You'll never see that edge shelf ledge.

You'll never see it, 'cause the blades on top.

But once you do an exploded drawing, you can now see that.

And that's where the blade rest.

See how I'm going, right? So if that was a solid drawing, like in the CAD one, we couldn't even see that.

Exploded, see everything.

Now, disadvantage of these exploded drawings, are that some of them are a mess.

I have had some flat pack furniture.

I won't mention the company that sold it to me.

But their instructions, their exploded diagram was horrible.

And it spent me longer trying to figure out what they're trying to tell me to do than actually doing the thing itself.

Ridiculous, so yeah.

But this is the advantage of exploding drawings, is that it doesn't follow a strategic layout, guides or it's not neat.

It can be confusing for the user such as myself.

Okay?So it happens.

Now the last one we're looking at is the orthographic one.

I remember I said it's a 2D drawing, of a three dimensional shape, okay.

So the advantage of that is a fact that, all the information is clearly laid out.

So I can see all the sides of my shapes and because I can see all of my views at once.

It's easy for me to identify for the problem.

So if I've got something wrong on one side that doesn't line up with the other side.

The drawing, the accuracy in the technical drawing should be able to identify that, before it goes to manufacture, great.

And also an orthographic drawing has to follow a universal standard.

So by that, what I mean is around the globe anyone who uses orthographic drawings, have to follow almost a specification of information.

They have to make sure they're including and following to make sure that the drawing is accurate.

So it's great.

Disadvantage of an orthographic drawing, is that it limits the realism.

So obviously, I mean, it's a sharp layer is a pretty basic object.

But imagine if it was a car, for example, you know it would take away the realism and interpretation.

So there's some parts you'd start to kind of, use your vivid imagination, okay.

Now, a proper orthographic drawing with all the measurements on it and angles and information, dimensions, huh! You might show how to read that.

You might look at it and be like, "What is this?" Okay.

So if you're not trained in it, it might be a bit of a struggle.

And again, you definitely need some specialist equipment and training.

I mean, to do a proper one in school, I can teach you to.

To do a proper one like an Architect, uh! Sells me, not me.

We need to go training for that, okay? So there are our three different types of drawings.

And there are advantages and disadvantages.

Hopefully you got some of those down and if you didn't get any.

You should have been adding them as we've been going along.

So pause the video now make sure you've done that, and then we'll progress.

So now you should have your own little collection of notes about the different types of drawings.

Advantages and disadvantages.

What is the useful.

What I like to do now is a little task.

I was going to think of at least five.

So at least five, different careers that would use some type of technical drawing.

Will be even better if you could identify the drawing they would use as well.

So for example, if I was going to look at a Automotive designer.

So someone who draws and designs vehicles, they very well would use CAD drawings and orthographic drawings.

And if it was to be a Games designer or a Game developer.

What type of drawing would you think you'd be using for your characters? Yap that's right, you'd be using CAD.

So pause the video now.

Write down five different careers, share your ideas amongst each other, and then we're going to progress.

So now what we're going to do is look at something called a Disassembly.

So I've been training for.

I really enjoy disassemblies, okay.

Now what I want you to do first of all, is think about what we mean by the word disassemble.

Now, if the Avengers assemble, is them coming together? What would happen if the Avengers were to disassemble? All sorts of the mad, Okay? Well yeah, so have that in your mind.

'Cause obviously disassembly, is where we taking a product apart, you know.

The moment we take a product apart, or tear down as it were.

Once you do this we can extract a lot of great information from a product, you know.

We can see what its components are.

We can see how it's fixed together.

We can see what materials have been used, and so much more things.

Now, some Designers or Engineers, people.

What they'll do if they had a product like so and then wanted to start investigating it.

By taking it apart, they could then see how certain components have been designed, how things have been put together, et cetera, et cetera.

So they've got the finished product already and they want to see how it operates.

This is something that we call Reverse engineering, okay.

So what I'd like to do now, make sure you write a note of that Reverse engineering.

But I also want you to have a little think about what other information can we gain by doing a disassembly.

So I've already said we can use it to help us analyse things like how some of these fit together, or how many pieces there are, et cetera, et cetera.

Well, what else do you think we can get from a disassembly? Pause the video now.

Just write a few notes or a list and then when we come back.

We're going to get into it.

So now I'm going to show you a quick video, of me just doing less disassembly of an everyday item.

What I want you to do though, while you're watching this.

Is just think about what you wrote down, if it makes sense.

So for example, if you wrote down that you think we do a disassembly to see how components fit together.

Maybe I could identify that by doing disassembly.

So watch, enjoy, make sure you learn.

So we're just taking an everyday pen and I'm going to form a quick disassembly.

Well, now it's an easy enough item for the simple fact that it's simply.

You know, when I find the screws I'm done.

It's got a threading on the inside.

So the way that it's assembled, is simply the piece is screwed together at certain places.

So it's an easy thing for me to disassemble.

However, what I didn't realise is just how many components or parts there are inside this pen.

Some parts proved a bit difficult, you know.

But what I will say is when you are disassembling, make sure you keep all the parts neat and together.

Because you are going to need these for your next task.

And there's a disassembled pen.

And there you have it, that is a simple disassembly.

As you can see now, I've labelled all my parts.

What is important for me to understand exactly what is what.

You know, thrust device and then cap a plunge.

But you didn't even know those things existed, right? Now when I've done this I should start answering these questions to myself.

So what's the item? Well it's just a pen, isn't it? Or is it just a pen?Mm hmm hmm.

What's the function of this pen? How many parts are there to name? Well, I never thought it was going to be 10, 11 pieces to my pen.

So I've learned something new there.

How do they assemble together? Well some parts you need to twist and screw.

Some parts you insert it and let the spring load it spring action.

So you know, there's different ways that it is fitted together.

What materials are used? Well I've got different metals, plastics, rubbers, you know.

A few different materials in there that again I've took for granted and I've never even thought about.

So I've managed to disassemble a pen and learn from that as well, amazing.

And it's not just a pen, you know.

I disassembled my little friend over here, Mr.Lego man.

Disassembled him, you know, I've learned a few things about him as well.

I didn't realise he was in so many parts, poor guy, but yeah.

That's what we do, we take them apart and we label them and then we can start thinking about these ideas.

Make sure you bear that in mind, because your next task is what I'm going to ask you to do.

What I'd like you to do now is go away and find a product to disassemble.

Please, please make sure you have adult supervision, slash adult permission, when you are disassembling an item.

I would prefer if you didn't do an electronic, just because we don't want any accidents.

I don't want to get in trouble.

But, you know if you've got an old toy or something that's broken that hasn't been plugged in that you're not using it, maybe.

But make sure you get permission anyway and supervision.

You very well may need a screwdriver.

And make sure see if it's a Flat-head, or Torx or Phillips-head.

Try and do something simple, you know.

Try and do something, that you can probably put back together.

Try and do something, that you're probably not going to get in trouble if you can't put it back together, you know.

Definitely helps, tell a story.

Probably interested, probably not.

When I was about 10, 11.

I disassemble my mom's Hoover, She wasn't happy.

And yeah, it wasn't for school, it was because I was bored and left alone for a bit.

So what did I learn that day? I learned how to get grounded so yeah, but yeah.

You can take any of these products, you know, old toys.

And go introduce yourself to deal with disassembly.

Take it apart, label the parts, take a photo.

Make sure you know where the parts go back.

If you've got an old camera, that'd be a good one, actually.

So this is what you're going to do.

Find a product, please get permission, all right.

Take it apart carefully, so we don't break it and damage it.

We want to try and put it back.

And then I want you to just make notes and answer the following things as well.

So what is the item? And what's the function? How many parts are there to the item? How is it assembled? So is it twist and pull? Is it pushed in? The screws and what materials are used? Is it a plastic, is it a metal, is it a sponge.

I don't know.

So pause the video now, find a product to disassemble and I'll see you when you get back.

Please stay safe, please stay safe.

So welcome back.

Hope you enjoyed disassembling your item and actually hope it's still disassembled.

Because you're going to need it for your next task, which I should have actually said earlier.

Oopsie!But yeah.

So we're just going to have brief conversation about exploded drawings before I show you a video.

And then I'm going to set you on your way.

So we started at the beginning of the lesson that an exploded diagram shows how components fit together and that's perfectly right.

You know, it gives also the user or the Engineer, an idea of how things are assembled and fit together.

And it also lets them see if there's any issues beforehand as well.

See if there's any errors, something doesn't quite align, it's quite visible.

Now when we do an exploded drawing, we tend to do an isometric plane.

Which means there are no horizontal lines and everything's going to be 30 degrees, just kind of like that, okay.

So our horizontal line is set at 30 degrees.

And that is where we're going to need our set square, okay? So I'm going to show you a video now, of how we construct a exploded drawing.

I'm going to start with the pen.

Then I'm going to show you someone else, my little friend and then we're going to set you on your task, enjoy.

Okay, so you'll see the first thing that I'm going to do is use my set square.

And under 30 degrees, I'm just going to set a guideline so to say.

Of where I'm going to draw my item around, okay.

Now, obviously I've deconstructed a pen and I'd got to draw it in an order.

So if someone was to follow the instructions, they could put it back together again.

So the very first thing I'm going to draw is going to be my tip.

And obviously I'm going to try and keep it three dimensional as well.

So it's going to be an isometric drawing.

And after my tip, I remembered my spring's going to go in there next.

So I draw my spring and then this will be followed by the ballpoint point tip and the ink chamber.

'Cause essentially that's what will be going in.

Now as you can see, I'm just doing a free hand sketch.

So we're not using any rulers, we're not trying to get it absolutely critically perfect.

We're just trying to understand the technique and get comfortable with it, okay.

So that's an explanation of how we do an exploded drawing, for an item, such as a pen where everything's streamline and goes into the same piece.

Now everything's moving in the same direction, it's beautiful.

But what about your item? You know, what if it's got parts that go to the left and go up and go to the left oh, this is tough, you know.

I'm going to show you another short video of how to do that.

If you were to disassemble someone like my little friend over here.

So watch this is going to be about two minutes and then we're going to set you onto your little task, okay.

Get in there.

Okay, so to do your exploded drawing, what we're going to need is a set square.

And you're going to want to be working on a 30 degree plane, okay.

So we're going to have no horizontal lines.

So no horizontal, we're working on 30 degrees, okay.

30 degrees from the horizon.

Now with this, what you want to do is make sure all your objects are keeping on the same line.

So you can see that I've started to draw the hand, I've started flesh out where the hand and the arm is there.

But you can see that I've kept it on a 30 degree line.

Also to make sure that this goes into the right place.

If I flip my set square over and I line it up, that's pretty accurate.

So you should see the point of the arm here.

Here's the right arm, here we go.

So, this part of the arm is this part here.

And it goes perfectly in that hole, because in the torso the body is going to be right here.

So where that fits in like so, I've got to make sure I follow by my drawing.

That goes in perfectly on that 30 degrees.

Does that make sense? So the other arm would still be on this line of 30 degrees and be drawn outside here.

So it's not covering up any of the detail.

The legs of the torso not the torso, the waist will go underneath.

And I will show the top detail, I'll show you how that connects into the body.

So on and so forth, okay.

So if you haven't got a set square, you can still do it freehand.

Try and get everything lined up, you can do it slightly by eye.

Where you could try and use the one of the 3D techniques, getting techniques we've done earlier on as well, okay.

And there you have it, your own guide to exploded drawings, okay.

Now, when you have finished your drawings but then you have something looks like this.

Feel free to add some colour to it, you can use it to get inline techniques that you've already picked up as well.

And if you notice you look at the pen, what I've done I've just put some dash lines in as well.

And that's just to show that things are in a line and where they're meant to fit together, okay.

So you feel free to do something like that to your work as well, to enhance it.

So exploded drawings, over to you.

So of course, now I'm going to set you a task.

What I'd like to do, is the product that you've just disassembled try your best to draw that in an exploded diagram.

Now I really, really like if you could draw it in three dimensions.

If you could use a set square and keep it isometric.

If you can't and you want to try in 2D first and then build up from that, that's absolutely fine.

You know, baby steps.

And you can also try and add some quality to your work.

But I like to pause the video now, go and do that and when you're finished come and see me.

So welcome to the end of another fantastic lesson, I don't know.

It's always good like I'm welcoming you back, but it's the end of the lesson, hmm, weird.

But anyway welcome back to the end of another lesson.

I know today's lesson, a lot of fun doing a disassembly, regardless of the items. It's always fun doing disassembly, in my opinion.

But the exploded diagram, I know it can be tricky, okay.

We all started from somewhere even me.

And I used not get any align, I'm trying to get perfect and keeping it on 30 degrees.

It's tricky, it's not easy.

But stick with it, persevere and you will get better outcomes, okay.

Now on that note, I'd really, really really like to see the work you've done today shared online.

So what you need to do, just go and book your parents or a legal guardian or someone responsible, an adult.

And go say, "Mr.Telfer said that I have to share my work on Twitter, because he wants to see what I've achieved." Okay.

So ask them to share your work on the Oak National's Twitter and hash tag, your favourite hashtag #LearningwithOak.

L-W-O, I'll be there to see what you've done.

You know, give it a like, give it a share and all that, but yeah.

Until next time stay good, stay safe and we've got to put our product back together as well now.

We all set people.