- [Instructor] When sketching symmetric features,
it's always a good idea to use
the mirror feature in sketch.
So you always have to start with something
to mirror about, so I've got a center line in here
that starts at my origin.
I'm going to mock up a symmetric plate
that I'm going to be using.
So, I'm going to just sketch an open ended plate
on this side, with a couple of holes in it,
and we'll add in some dimensions as well,
to locate everything.
Okay, I've almost got this fully defined.
Alright, at this point I've fully defined this sketch.
Everything is in black, it looks good,
but it's open ended, and I want to mirror this
about this center line.
So I'm going to go ahead and turn on
the mirror entities feature,
and first it asks you what do you want to mirror.
So I'm going to go ahead, and without selecting this line,
I'm going to draw a box, pulling from right to left
to get the green selection, and grab everything.
And you can see it grabs all of the entities.
Now we're going to copy that, so we're going to make
another copy on the other side.
You can also just mirror it and have it delete
the old feature, but we want to keep that.
And now we go down to the next drop down,
the next menu here, select it so it turns to blue,
so that we've activated it, and we can select
the center line that we want to mirror this about.
When we do that, it's going to give us a preview
in yellow of the final result,
and that looks good, so we're going to go ahead
and click okay.
Now these two sides are connected together,
so as I change this dimension over here,
the dimensions on the other side will change as well,
and those features will move accordingly.
Now even if I didn't have all of these dimensions,
for example, and I just wanted to drag and drop,
I could do that.
And if I move the parts on this side,
you'll notice that the parts on the original side
move as well, because now we have the symmetric
relationships created between all of these features.
That's how it maintains the mirror
that you created using the mirror feature.
Creating a symmetric relationship.
So that's pretty basic, when we're done
we can go ahead and extrude that and we've created
a symmetric plate there, and when we want
to go back and edit it we simply can.
We can drag and drop, or change the dimensions
as we've discussed.