>> This is a tutorial for lab 4, the AutoCAD part,
this is the figure that we're going to create view for.
Orthographic top, front and right side views starting
with an imperial drawing, units and inches.
We start by creating layers.
Layers is a way of separating different types of lines
into different parts of the drawings.
So first one is the construction layer.
We're going to keep the color white
and line type of continuous.
Then we're going to create it as a second layer,
another layer called object lines where we're going
to put visual lines in our graphic drawings.
I am going to change the color to blue for this
and keep continuous as the linetype.
And then let's close the layer property manager.
Let's look at the settings for object snaps [phonetic]
with what we need seems to be there, that's okay.
Then what we do next is we change our layer
to the construction layer.
We're going to create our construction line
and the construction layer.
So the current layer is construction,
all of the entities we're going to create will be in this layer.
So we create construction line.
First a horizontal construction line passing
through the origin, comma, zero.
And then we're going to create another construction line,
draw construction line.
This time vertical, V for vertical.
Press enter and then also passing through zero,
comma, zero at the origin.
Let's scan a little bit to see to see where the two lines
that we have created are so far.
They're both back into the origin,
one's horizontal, one's vertical.
We're going to create more construction lines
by simply offsetting, okay,
working on the horizontal construction line,
2.7 is for the front view.
And then offset again, 1.5.
And looking at the handout,
that's the top view we're starting to create now.
And then, finally, 3.5.
Okay, offset this construction layer on this side,
construction line on this side.
Now we're going to work
on offsetting vertical construction lines.
So 4.5 for this one at the origin copied on this side.
Repeat, offset again.
This time with a distance of 1.5.
This front view to the beginning of the right view.
Then, finally, another 3.5, okay, to the right.
Okay, so those construction lines will serve as the location
of top, front, and right side views.
So next thing we're going to change our current layer,
set the current layer to object.
We're going to create object lines now.
On the handout, we're going
to create first the rectangle on the top view.
[ Background Sounds ]
And then we're going to then create L shape
in the front view.
Oops, I'm missing some distances,
but let me do just a left and the bottom part
of the L. Then I'm going to create rectangle
for the right side view.
I'm relying on intersections and perpendicular because of all
of those object snaps aren't on.
Now click to create the letter L in the front view.
Then offset the bottom construction line by .75,
I'm looking at the original figure.
It's the L is .755.
And then offset the vertical construction line on the left
by one because the distance of the vertical side
of the L is one according to the drawing.
Then I'm ready to create and assume the object line,
so I continue making the missing parts of my L. Oops,
I forgot the top short line there
for the line, so let's do that.
I think I have pretty much the figure that's
on the handout, okay.
Okay. Now continuing on, I'm going to, this is the step 17,
using Otrack in order to construct that line.
Otrack's on, so.
I didn't click on the front view, actually,
use the front view guide for the location of that line.
Now focusing on the top view, I'm going to turn
on my construction layer again in order
to help me construct the details.
Offsetting, okay, the missing construction lines, 1.25.
This bottom one there and this top one
over here lets me set a horizontal construction lines.
I'm going to create another construction vertical line,
construction line.
That's the 1.5.
Oh, and I'm missing another couple
of horizontal construction lines that are .6
from the edges of the top view.
So .6 from here to here and also the bottom one,
.6 from here to here.
Now I'm going to start creating some of the lines, the midline,
the outline of my top view.
So that's one and one on the bottom.
Okay. And then sequence of short.
Okay, to locate the circle, I'm going to create temporarily
that vertical line there.
I'm going to use the center midpoint of that vertical line
to find the center location of the circle of radius .5.
And that circle should be tangent do the construction
lines in exchange for the okay.
I'm going to do the missing horizontal line here
to the quadrant.
Quadrant is the highest, lowest, or left-most point.
Here's another one from this quadrant to this and to section.
Oh, what else are we missing?
Okay, this short horizontal line's here,
another one over here, another one over here.
And here. Okay, let's see how it looks
by turning off our construction layer.
Let's clean it up a little bit and see what we need to trim.
So using this?
Trim.
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using this line
This line.
This one and this one as cutting edges or boundaries.
And trim away this line, this line,
this line in the middle here.
This one, oops, I missed it.
Let's go back.
Trim and then I think that's it
for the trimming, finish the trimming.
Let's just erase this temporary line.
There's many ways of doing this.
It looks correct now based on the drawing.
Now let's continue on by turning
on back our construction layer on again.
And I'm going to create the miter line, okay.
But the miter line is to be created
in the construction layer, so I change my layer to construction.
Here's my command for a 45-degree line that allows us
to transfer distance of between the top view
and the right-side view.
Then I'm going to copy this vertical construction line
to relative to the base point into all
of these intersections with the miter line.
So we have depth locations from the top view,
and I'm transferring these locations into the right side
by using the miter line.
Okay. And then I also.
Oh, yeah, I'm missing the height dimension for the front
in the right-side view, 1.7.
Okay, now I am about ready to
go back to object line again and start completing both the front
in here is missing that line, the distance
of 1.7 from the bottom.
Okay, and this one here is the front view also.
And then on the right-side view, he can start creating this line,
this horizontal line that goes all the way
from the front to the back.
Then this diagonal line or midline here.
Another
[ Background Sounds ]
set of line here
Another here.
Okay. And then vertical lines here
on the right side here as well.
[ Silence ]
Let's see how it looks
by turning off our construction layer.
Let's clean it up by trimming.
Okay this, this, this, and this line.
Cutting edges.
Press enter and then click on the parts
that you want to trim away.
So it's looking nice.
I am now dismissing the tiny, little circle
in the right-side view.
I'm going to turn on my construction layer again
to help me find a location of that.
I'm going to offset because I know that the center
of that little circle is at the distance 1.6 from the top,
so I offset that top construction line.
And then I'm also going to locate the center of that,
the depth of the center of that
by copying this construction line
into the midpoint of my miter line.
Because I know that the center of that is right in the middle.
Now create a circle with this as the center
and the section will have the construction line.
It really is .25 because the diameter has given us .5.
That locates my circle in the right-side view,
and that looks fine right now.
I think I'm done with all the object lines.
I'm just now missing the hidden lines.
And so I go to the layer property manager
and create a new layer called hidden lines.
Going to select a different color for that, say green.
And then, of course, the line type should be it's not there,
so I load.
Hidden lines not currently loaded.
So load, look for hidden, and then press okay, and make sure
that you select that as the line type for hidden layer.
And then another layer called center lines.
That needs a different color, say red, okay.
And then I need to change the line type also.
It should be center line type, but it's not there,
so I click on load again and look for center line center,
okay and don't forget to select center
as the line type for center line.
I think that completes my two new layers.
I will close the layer properties manager,
and then I'll go to hidden lines.
So where should the hidden lines go?
So the holes are usually are the sources of the hidden lines.
So I turn on my construction layer again
to see the location of my hidden lines.
So I know that the little circle will.
Create hidden lines.
So I try to find the location of the corner, the top-most point
of the cylindrical hole and the bottom of the other quadrant,
so I created those two horizontal construction lines.
I also need to find a location relative to the top,
so I copy a vertical construction line
here using this as the reference.
I take that to the right quadrant
and to the left quadrant, okay.
And also one for the quadrant of the semi circle
because it was also create the hidden line
in the front view.
Next, I copy another couple of horizontal construction lines,
okay, using the miter line to locate the hidden lines coming
from the tiny holes in the top view.
Going back to hidden lines because I'm now ready
to create hidden lines, I will create one
for the top view here.
This hidden line here and this another one here, over here.
Okay, corresponds to the location
of the little hole I see
from the top is actually not seen that's why it's hidden.
And this one here is the hidden line
in the front view coming from top.
My circular arc and these two pairs of hidden lines here correspond
to the same tiny,
little cylindrical hole that's seen from the front.
And I think those are my only hidden lines.
Okay, I think we're done with hidden lines.
We need to now start constructing center lines.
So I'm going to go change my current layer
to center lines, okay.
Center lines will locate the centers of all arcs and circles.
So I need to find the location of the center
of the cylindrical hole in the top.
Okay, that's why I copied that and put it
on the construction line.
So this is my first center line in from the top.
Center line for the middle cylindrical hole.
Take note that in order for us not to be confused
with an actual object lines and hidden lines or hidden lines
and center lines, center lines that go beyond the limits,
slightly beyond the limits so as not to confuse it.
Okay, the center line for the circular hole arc.
Again, it goes beyond the actual location of the arc.
There's another one here going beyond slightly.
So try not to end in actual construction lines
or object lines or hidden lines or you confused.
And then, finally, on the front view, I have a center line here,
slightly beyond, slightly beyond, okay.
And then right side two center line corresponding
to the circular local, cylindrical hole.
Again, it goes beyond the boundaries of the cylinder.
And then one going left to right.
Using tracking, I need to go slightly beyond.
Those are my hidden.
So one thing you will notice is
that even though the center line type which is long short,
long short, long short,
sometimes you don't see the long short, long short pattern.
And the only thing we see currently is the one
in the front.
So what you can do is change the line-type scale.
So you select all the center lines, okay.
And then under properties, click on the property manager,
go to line-type scale, line-type scale, and make it smaller.
Let's say, let's try .3 and see if it works.
Rather than one, by default it's one.
Then let's see how it looks with this smaller line-type scale.
Hopefully, you will see the actual, there we go.
It's long short, long short, long short, and you can see
that it's center line.