>> This is a tutorial for part 2 of lab 2.
This is the figure we're going to try create.
We're going to use a lot of snaps.
So let's start with new file.
No template.
Metric. And then it looks like the instruction's going
to need some pull down menu.
So we do the show bar menu.
Menu bar sorry and then click on units.
Change -- make sure that the units are in millimeters
and change it to one decimal place.
Okay. And then format drawing limit.
And type the indicated drawing limit, 200 x 160.
And then let's go create a circle.
Center of the circle is, yeah, 50 50.
Okay and now the radius 25.
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And then let's view zoom all to zoom on all the drawings so far.
Or you can also use the navigation bar
on the right to do zoom all.
And then let's create -- let's change the object snap setting.
Make sure that all of these are on.
I think we have everything that we need on.
Now let's create a line.
Passint through the center of the circle
and then let's use polar coordinates.
Show at length of 300 at an angle 30 degrees.
Okay. And then next thing we do is create another circle
at the right end of this line, radius 11.
And then a third circle, centered into section
of the big circle and the line.
Okay of radius 20.
Next thing we're going to do is offset the straight line
at a distance of 11 on both sides of the line.
So 11 to above and click again 11 below.
So these two new lines tangent to this small circle.
Next thing we're going to do is going to start trimming, okay.
Select the trimming entities, the 2 circles and then press enter.
And then click on the parts
of the circles we want to trim away.
And then trim again.
This time with the two lines as our trimming entities
and then click on the circle parts are going to disappear.
And then do the same thing to the remaining parts of the line.
Trim away the line in the center, we simply erase it.
And then we're going to turn this into a poly line
by using modify objects poly line.
Click on any entity and then it asks us if we want to turn
in poly line, say yes and then click j for join and click
on all of the remaining entities
to join the poly line that we have so far.
And then when we're done press enter.
And it doesn't look like anything changed.
The only result is that everything now is connected
as a single entity and the reason why we do
that is we're going to offset the distance of 5.
Everything that we have in the poly line
and we can offset outside
so click anywhere outside creates a copy that's 5 units
away from the original one.
An outside.
Next thing we do is we're going to explode the outer part,
explode the reverse of polyline; it just separates all the poly line
into individual entities.
And then we're going to do --
fillet or fillet. Type r to change the radius 5
and then we click on this line and this arc here to let
that sharp corner becomes now a curve of radius 5.
Do the same thing on the other side
and then do the remaining fillet on the outer part
that correspond to the outer, geometry of the guitar.
It looks like a guitar.
Now next thing we do is we create a polygon.
It's a pentagon.
So number of sides is 5.
Okay. And the center of this polygon is the same
as the center of the original circle right here.
And then inscribe the radius of 20.
Press enter and that gives us the polygon.
And I think that's it.
We're done.
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