WEBVTT

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>> This is a tutorial
for part 2 of lab 2.

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This is the figure we're
going to try create.

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We're going to use
a lot of snaps.

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So let's start with new file.

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No template.

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Metric. And then it looks
like the instruction's going

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to need some pull down menu.

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So we do the show bar menu.

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Menu bar sorry and
then click on units.

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Change -- make sure that
the units are in millimeters

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and change it to
one decimal place.

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Okay. And then format
drawing limit.

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And type the indicated
drawing limit, 200 x 160.

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And then let's go
create a circle.

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Center of the circle
is, yeah, 50 50.

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Okay and now the radius 25.

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[ Background sounds ]

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And then let's view zoom all to
zoom on all the drawings so far.

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Or you can also use
the navigation bar

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on the right to do zoom all.

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And then let's create -- let's
change the object snap setting.

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Make sure that all
of these are on.

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I think we have everything
that we need on.

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Now let's create a line.

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Passint through the 
center of the circle

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and then let's use
polar coordinates.

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Show at length of 300
at an angle 30 degrees.

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Okay. And then next thing we
do is create another circle

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at the right end of
this line, radius 11.

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And then a third circle,
centered into section

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of the big circle and the line.

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Okay of radius 20.

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Next thing we're going to do
is offset the straight line

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at a distance of 11 on
both sides of the line.

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So 11 to above and
click again 11 below.

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So these two new lines tangent 
to this small circle.

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Next thing we're going to do is
going to start trimming, okay.

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Select the trimming entities, the 2
circles and then press enter.

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And then click on the parts

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of the circles we
want to trim away.

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And then trim again.

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This time with the two lines
as our trimming entities

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and then click on the circle
parts are going to disappear.

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And then do the same thing to
the remaining parts of the line.

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Trim away the line in the
center, we simply erase it.

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And then we're going to
turn this into a poly line

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by using modify objects
poly line.

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Click on any entity and then
it asks us if we want to turn

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in poly line, say yes and then
click j for join and click

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on all of the remaining entities

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to join the poly line
that we have so far.

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And then when we're
done press enter.

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And it doesn't look
like anything changed.

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The only result is that
everything now is connected

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as a single entity and
the reason why we do

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that is we're going to
offset the distance of 5.

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Everything that we
have in the poly line

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and we can offset outside

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so click anywhere outside
creates a copy that's 5 units

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away from the original one.

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An outside.

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Next thing we do is we're going
to explode the outer part,

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explode the reverse of polyline; it
just separates all the poly line

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into individual entities.

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And then we're going to do --

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fillet or fillet. Type r
to change the radius 5

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and then we click on this
line and this arc here to let

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that sharp corner becomes
now a curve of radius 5.

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Do the same thing
on the other side

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and then do the remaining
fillet on the outer part

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that correspond to the outer,
geometry of the guitar.

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It looks like a guitar.

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Now next thing we do
is we create a polygon.

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It's a pentagon.

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So number of sides is 5.

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Okay. And the center of
this polygon is the same

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as the center of the
original circle right here.

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And then inscribe
the radius of 20.

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Press enter and that
gives us the polygon.

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And I think that's it.

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We're done.

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Optional you can
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