>> This is a tutorial on lab number 12
which is secondary auxiliary view.
We're given the front and the right side views.
And we're asked to construct first the auxiliary view
and then the secondary auxiliary view
as indicated by the fold lines.
So I've created some of the projection lines from points
in the front view perpendicular
to the first auxiliary reference claim,
just to illustrate how I did that.
Sometimes when you create a construction line it
automatically appears to be vertical or horizontal.
If you're having that problem,
just try creating the construction line somewhere else
where there's no line yet or objects.
And you can make it perpendicular
to your reference plane.
Like this one I'm doing.
And then just copy
that construction primary construction line, okay,
that is not pointing to any point into --
from its current location into the location.
Say I'm missing one right in this corner.
Okay? And then just erase that initial one
that you constructed, not passing through any
of the details, because sometimes it automatically does
a horizontal and vertical.
Now I've already offsetted the depth of point A. I'm going
to do another offset for point C from this distance
to the reference plane.
The original reference plane in this direction, the distance
of B the same as A. Now I'm ready to create plane A, B,
C in the first auxiliary view.
Here is the location of point A in the front,
and I know that the offset is the first line here,
so this must be point A. Now point B is
in the same projection line, construction line,
and it's the same offset as B. Therefore, A and B actually --
this appears -- appears as a single point and then here is C.
So in fact plane A, B, C are appearing on its edge because A
and B correspond to the same point.
Now I'm going to offset this remaining distance here
from the right side view
for this reference plane on that side.
And then I'm going to continue working on the rest
of the first auxiliary plane.
I'm going to work on the top plane.
So from point C I know
that there's a C primed directly behind it in that projection.
And then for this corner here,
there's one that's directly behind it.
And then the point to the front of it that is connected
to point A, so that plane there is on the top.
Now this plane on the side,
we'll just view this rectangle here.
And I'm almost done.
I'm only missing details for this couple
of projection lines coming from the bottom.
And I know that those will be hidden lines
because they will be covered, so I'm going to create a line.
So a hidden line from here to here corresponding to the point
over -- oh there's one hidden line
but it's directly below the solid line,
so I don't show that.
And there's one more hidden line over here
in this right lowest corner and going this way
and that pretty much completes the first auxiliary view.
Now next thing I'm going to do is I'm going to go
to a different -- to a construction layer.
Say construction layer two.
And then create projection lines starting
from this point perpendicular to this.
So this time it worked just fine
because there are no existing projection lines yet.
Copy that construction line from this point to this point.
So all the points I see
in the first auxiliary view I just create construction lines
perpendicular to the secondary auxiliary reference plane.
One here also.
One here. One here perpendicular [phonetic] line and one here
for points A and B corresponding to each other.
And then I'm going to start offsetting.
Distances from the primary auxiliary reference planes
should be the same as measured towards the front.
So point A, for instance, offset from point A
to the primary auxiliary plane, ARP.
And then from ARP1 to this other side
for the secondary should be the same distance.
Now I'll do this offset for B to the primary, and this primary
into the secondary will be the offset for B.
And then I'm going -- oh, for C, I'll do the same thing.
Here's the offset.
I want to make sure that it goes to the perpendicular, okay?
So this would be the location for C. So those three lines are
for A, the widest one will be B and then C right in the middle.
Now I'm ready to create object lines
with a secondary auxiliary reference plane starting
from point A, which is over here.
The first, the closest offset,
so that's AB is along the same construction line
but it's the farthest one.
And C is along this projection.
It's the middle one and then it goes back to A.
So that's the appearance of A, B,
C. It's actually a two [phonetic] sides
and a second auxiliary reference plane.
And I'm going to go towards here.
There's a plane over here.
I'm going to look for those one by one starting with AB.
I already have [foreign accent] I'm going to do the offset
for the point that's directly below B, which is this
to the primary auxiliary reference plane.
Offset that to the right for the secondary and then offset again.
Going to the next point will be right here.
So offset again from this point to the reference plane.
The same reference plane ARP1 away towards the secondary
and then going to the next point, which is this.
Offset again from this to that reference plane.
And I noticed that that one is this one,
which is slightly further than A.
And then finally this point here to that.
I offset this on the right side, and it looks
like it landed right at the same location offset
as point A. I have to remember that.
Now I'm ready to [foreign accent] one more
for the closest one here.
Distance from here to this.
Okay. The same reference plane.
That's the one that corresponds to the front left top corner,
which is the closest to the ARP1.
So I'm now going to create from A to B,
B to the point directly below these along this projection.
And I know that that's the farthest offset.
So it's over here and the next point down here will be the left
of that, which corresponds to this.
And I know that that's the one -- it's along this projection.
And I know that's the one that's slightly closer compared
to point C. So it's not [foreign accent] C. It's this projection
here [foreign accent] on that.
I think that's correct.
And then I'm going to go up, which corresponds
to this projection here.
And I know that that's the next one,
right here in terms of distance.
And then this point here is at the same offset as A,
so along this projection line [foreign accent].
Finally the closest point to my ARP1 would be corresponding
to this corner and then it goes back to A. So that plane
that we just constructed there is now complete.
Next thing we want to do is locate another plane.
Maybe how about this one here?
Okay? Starting from point C, okay,
to the point directly below -- behind C. This is point C.
And this is the point that's going --
see there's a point directly behind that.
We call that C prime going to this projection,
but it's at the same offset, according to the front view.
And then from there I can go towards the --
okay, the one here is the top [phonetic] plane
which corresponds to -- so I'm working on the top plane,
which corresponds to this.
So and that is at the closest projection.
So it's this one here and that's the closest offset
for a secondary.
And then it goes back to the front here.
Right there.
That line here corresponds to this line.
So it's starting to make sense.
Now I'm going to work on the other plane
that contains point C as well but the vertical plane.
So C to the C behind it, C prime.
And then it's going to go --
I'm working on the plane that's appearing as a vertical
on the right side on the front view and it's going
to go to this point here.
Okay? At the same -- at the farthest point at B. Oops.
I forgot -- it appears that we --
I'm missing a projection to that.
So copy this -- so I'm missing a projection.
This hidden line here corresponds to the lowest point
on that -- it's the one that's directly behind the point below
point B. So I'm starting from C prime.
And I'm going to that point
that is right there behind the lowest point behind B
or below B. It's going to be the same distance
as the lowest point, is the farthest over here.
And that's -- that's the plane that is on the right side
as shown in the front view.
So it's starting to make sense now.
Now let's look at the plane that is in the back,
the one that's farthest from the front.
So it's going to be completely hidden.
So I'm going to start from -- so I'm changing to hidden lines.
So it's going to be this plane here starting
from the point here.
Okay? It's going to be similar to the shape of the one
on key [phonetic] opposite side.
So I'm going to this point here, which is along this projection,
which is the same offset as this guy here.
So it goes like that.
So it's going to be very similar
in shape though on the other side.
Then it goes to this.
I'm just following sort of the --
that shape now on the other side.
It goes to this, so I think that's correct.
And then to this, following that shape.
Then it goes back to the corner.
Yep. It's sort of a mirror -- a similar shape.
Then I'm just missing new lines connecting this
to this and another one.
This is for the notch on the bottom.
This to this and I think that's it.
Let's see if it makes sense.
I'm going to zoom in a little bit.
Okay. Zoom in and I'm going
to turn off all the construction lines and let's turn off the --
the fold lines as well.
And it looks correct now.