Lesson video

Hello there, my name's Mrs. Taylor, and I'm really pleased you can join me for our lesson today.

Our lesson today is mark out and prepare materials, polymers and timbers, and this is part of the iterative design nature unit.

The outcome, I can mark out materials accurately to manufacture my design.

We have three keywords.

Marking out, the process of measuring and drawing on a material before manufacture.

Accurate, which is to be correct and precise.

And measuring, determining the size of an object using a tool.

There are two parts to our lesson today, prepare for marking out and marking out a design.

Let's begin.

Marking out is measuring and drawing on a material before manufacture.

This is a critical task, and should be carefully and accurately completed.

It helps to prevent material waste, ensure a good fit for assembly.

Assembly means when we put things together.

And save time, cost, and reduce errors.

Let's have a check for understanding.

When manufacturing, marking out accurately, A, prevents material waste? B, makes the design better? Or, C, ensures a good fit for assembly? Pause the video and have a go.

Wonderful, let's check.

That's right, it's both A and C.

Marking out accurately prevents material waste, and ensures a good fit for assembly, well done.

A variety of tools are required when working with different types of materials, including when marking out materials.

Different materials require specific marking tools.

Using the wrong tool, such as a pencil on metal, can result in unclear or inaccurate marks.

Recalling measuring skills using millimetres will support successful marking out and the preparation of materials.

Equipment needed for marking out on polymers or timbers include a pencil or marker, a metal ruler, and a try square.

Additional equipment that will support successful marking out on polymers and timbers include, perhaps you might need a circle template, or some masking tape, or a tape measure.

Here we have a check for understanding, can you name these pieces of equipment? Pause the video.

Wonderful, let's check.

This is a try square.

A metal rule, sometimes referred to as a steel rule.

Equipment to avoid.

Plastic rulers, the measurements don't start at the ruler's edge, leading to inaccuracies when measuring.

And thick nibbed pens, they produce a thick line which does not support accurate measuring and cutting.

When marking out materials, you should try to mark out shapes from the edges or as close to the edges as possible.

Why do you think that is? This avoids waste and can make cutting less difficult.

Use a pencil, ruler, or tape measure to construct any dimensions and always check your measuring.

Use a try square to start any straight lines to ensure lines are perpendicular to one another, or the edges of the material.

Here we have a check for understanding.

What can you use to make marking out lines perpendicular to one another? Is it, A, a board marker? B, a ruler? C, a try square? Or D, a protractor? Pause the video.

Great, let's check.

That's right, it's a try square.

You could use a compass or a piece of string to mark out curves.

Pencil lines do not mark out on most polymers.

A permanent marker pen with a thin nib, or masking tape with pencil lines can be used.

This example is a curved shape, marked out using a permanent marker and a template.

A success criteria to support marking out on timber could be check for straight edges, surface marks, and scratches.

Mark out from the edges and not in the middle.

Use a metal or safety rule for accuracy.

Use a try square to ensure straight and perpendicular lines.

Use the correct equipment for curves and try not to create freehand.

And use resources like an orthographic projection to support with dimensions.

Here we have task A, peer assess the example of marking out below using the success criteria below.

Check for straight edges, surface marks, and scratches.

Mark out from the edges and not in the middle.

Use a metal or safety rule for accuracy.

Use a try square to ensure straight and perpendicular lines.

Use the correct equipment for curves and try not to create freehand.

And use resources like an orthographic projection to support with dimensions.

Pause the video and have a go.

Wonderful, let's have a look at some of the answers you may have come up with.

The shape has been marked out in the middle, which is wasting material.

The lines don't look straight, I don't think a try square has been used.

A thick pen and a plastic ruler have been used instead of a thin nib pen and a metal rule.

And the surface quality of this material is poor, I can see damage.

Well done.

Part two, what changes would be required if marking out this shape on timber? Pause the video.

Wonderful, let's have a look at some of the answers you may have come up with.

If the edges were straight, any straight lines could be marked with a try square.

If the area was larger than 300 millimetres, a tape measure would be more suitable than a ruler.

I would also use a pencil instead of a pen.

Well done.

We now move to the second part of our lesson, marking out a design.

Below is an orthographic projection for an accessible herb planter.

Marking out the base on mdf could be supported by an orthographic projection and success criteria.

Let's have a check for understanding.

Select the important document that can support marking out.

Is it A, a manufacturing time plan? B, a specification? Or, C, an orthographic projection? Pause the video and have a go.

Wonderful, let's check.

That's right, it's an orthographic projection, which has all the detail and dimensions required.

When repeating a complex or curved shape, it is useful to use a template.

If you have used CAD to design your planter, you could print or laser cut the template out on card.

Alternatively, you can use a ruler, string, and compass to mark out the template.

The success criteria being used to support the marking out include check straight edges, surface marks, and scratches.

Mark out from the edge, use a pencil or thin nibbed marker, metal or safety rule, and a try square.

Use the correct equipment or create a template for curves, and use an orthographic projection.

Here we can see a picture of marking out timber with a pencil and a template.

Here we have a check for understanding.

Identify what is missing from the marking out success criteria for polymers and timbers.

Pause the video.

Great, let's check.

That's right, mark out from the edge was missing and use an orthographic projection, well done.

We now move to task B.

Using a design that you have created, mark out on polymer or timber one component.

Use the success criteria below for support.

Pause the video and have a go.

Wonderful, let's have a look at some of the answers you may have come up with.

Your answer could be, marking out polymer with a permanent marker and template.

The surface is free from defects or marks.

It's marked out from the edge to minimise waste.

It's a thin nibbed marker.

And use the correct equipment or create a template for curves.

And use an orthographic projection to check the dimensions.

Well done.

Here we have a summary of our learning today.

Marking out is the process of measuring and drawing on a material before manufacture.

It is an important task, and should be carefully and accurately completed.

It helps prevent material waste, ensures a good fit for assembly, and saves time, cost, and errors.

Different materials require specific marking tools.

Using the wrong tool can result in unclear or inaccurate marks.

To support the marking out process, use the correct equipment, an orthographic projection for reference with dimensions, and a marking out success criteria for your material.

Well done, and thank you for joining me today.