This program is brought to you by the world's most famous engine, the Ogawaya century.
The first small engine in Japan in the 11th century, and it's been exported to the United States.
It was developed by Marine Engine in the 13th century.
In the next 40 years, it has been looking at the small engines.
It walks this road.
Always leading the world of small engines, the OS engine.
Today, we are in the research room of Kobe University.
Today, we will talk about how to draw a ellipse.
I am Professor Shiro Odaka, a professor at Kobe University.
When we draw patterns, we can draw a square or a circle.
I am wondering what to do with the ellipse.
What is a ellipse?
The ellipse is a small curve that is close to the circle.
If you look at the circle, it will all be a ellipse.
If you don't look at the circle from the front, it won't be a circle.
There are many people around the world who want to draw a ellipse.
There are four ways to achieve this.
Before we start, please tell us the definition of a ellipse.
There are two points.
The length of the line does not change.
The distance from the two points is the miracle of the point.
The ellipse is a diagonal line.
The ellipse is a vertical line.
The ellipse is a triangle.
The ellipse is a vertical line.
Please tell us how to draw a ellipse.
The line is a vertical line.
The ellipse is a diagonal line.
This is a machine.
There is a compass on the end of the line.
The compass has a vertical axis.
The compass pipe can rotate while sliding.
The pencil can rotate while rotating.
The pencil pipe can rotate while rotating.
The shape of the
circular saw is cut diagonally.
The part that is cut diagonally is the base.
So this paper is the cutting surface.
Yes.
Let's draw it.
When I draw the base that goes through this point and this point,
I first match the radius with the shorter one.
This is the free-to-use surface.
And when I change the angle,
this part goes here and that part goes there.
Change the angle.
Change the angle appropriately and fix the axis with your left hand.
And then, when you take this out of here,
rotate it and pull it up.
This way, the radius is the correct one.
Is the way to pull it up fast or slow?
Yes, it's the same.
If you do this, it will be like this.
I see.
It's the same for anyone to rotate.
Rotate and pull it up.
You can repeat this kind of movement.
I see.
Now, let's move on to the third one,
which uses cross-slide.
This cross-slide is this and this.
It's the axis.
Yes, this is the X-axis and this is the Y-axis.
And this point slides on the X-axis.
This point slides on the Y-axis.
It's like that.
If you adjust this, you can draw a large or small one.
If you hold this and draw this,
this is the radius.
I see.
You can draw it nicely.
Can you show me?
I adjusted it a little.
It's a little small.
Now, with this, I will...
Huh? Huh?
Did it slip?
Yes.
It's a little stuck.
Like this.
Ah, you drew it nicely.
I see.
Now, let's move on to the next one,
which uses cross-slide.
Please explain this machine.
This one.
This is...
I don't know if you can see it clearly,
but there are large and small plates.
This is the guide.
It slides around the guide.
The center of the large plate is in the middle
and the center of the large plate moves in a straight line.
Small plates move in this direction
according to this guide.
That's why the X-axis and Y-axis
were replaced with the center of the plate.
You just changed the shape.
Yes, it's the same in reality.
Let's try it.
There is a pencil at the end.
If you rotate it,
the radius is written.
I see.
Let's try it.
You drew it nicely.
Let's move on to the next one.
This one.
This one seems more difficult.
It's a bit complicated.
This is the X-axis of the cross-slide
and this is the Y-axis.
It's okay if both are X-axis and Y-axis.
At the bottom,
there is a cross-slide
with a diagonal axis
of the front.
There is a pencil at the end.
From the top,
you can use the spring
to press it down.
If you rotate it,
the radius is written.
This is easy.
I see.
You introduced three things
using the cross-slide.
You can draw it easily
with this machine.
Yes, it's easy to get used to it.
Let's move on to the next one.
This is the fourth one.
You can draw the cross-slide
using a template.
You can draw it using an affine pantograph.
You can also use a computer
to move the pen to draw.
There are many things like this.
Let's move on to the next one.
Let's introduce the template.
The template is
a plastic acrylic.
There are holes in the cross-slide
from the beginning.
This is often the case.
You can put this here.
You can draw it.
This is easy.
You can draw it in a paper box.
But this can't be
transformed into a continuous shape.
You can only draw it
in a certain size.
I see. You want a medium size.
You can also draw it in a bigger diameter.
You can't draw it
if you want it to be more round.
You have to prepare a lot of things.
What you introduced earlier
is a cross-slide.
You can draw it in any size.
There are limitations.
You can draw it in any shape
such as a long or round shape.
I see.
Let's introduce
the one that draws a closed-slide.
What is a closed-slide?
It's not exactly a closed-slide.
It's very similar
to a mathematical one.
I see.
There are some
that are different.
This is the closed-slide.
I'll show you.
You rotate it
while rotating it.
It's quite difficult.
Is it difficult?
I don't draw it very much.
I'll show you how to draw it
in a logical way.
I see.
I use a cross-slide.
I use a cross-slide
to draw a cross-slide
and I changed it to a straight line
while rotating it.
I think it's a cross-slide.
I see.
Let's introduce
the one that draws
with an affine pantograph.
This is an affine pantograph.
I heard that
you invented it.
I did.
Let's see it.
This is a circle.
This is a table.
I see.
I draw a circle
with this.
I draw a circle
with this.
I drew a table.
It's convenient.
I'll make it bigger.
Let's make it smaller.
I see.
It's good to do it with a foot set.
I have a table.
It's a free-for-all.
Why is this?
This is
a parallel support ring
in mechanical engineering.
There are four points
in the parallel support system.
One of the four points
is a straight line movement
and the other is a straight line movement.
When I draw a picture,
these four points
are always in a straight line.
The length of these four points
does not change.
When I draw a picture,
I draw a picture
in one direction,
which is called affine conversion.
You draw a picture
in this direction.
I see.
This is a circle.
This is a square.
This is a parallel support ring.
There are various functions.
In addition,
you can draw a picture
by moving the computer.
This is a computer,
so you can draw anything.
Today, I had the opportunity
to show various machines
by drawing a ellipse.
I feel like I can draw it right away.
Thank you very much.
At the OS Live Steam Center,
we accept your questions
for those who are interested
in Live Steam.
For more information,
please contact
Osaka 06-704-9821.
We are waiting for your questions.
People have been
dealing with various machines
for a long time.
Eventually, steam locomotives were born
and traveled the world.
For 50 years,
they loved steam locomotives.
OS, which continued
to be the most popular machine
in Japan,
was the first machine
to be developed by
the king of small engines,
Ogawa Seiki.
This program was brought to you
by Live Steam OS,
the provider of
the most popular machine in Japan.