- [Instructor] Now that we've applied
some geometric constraints, I'm gonna go through
and apply some dimensional constraints.
So I'm gonna double click on my sketch to reactivate it.
Now that I'm back in the sketch,
you'll notice, down at the bottom, in the queue line,
it's telling me sketch is fully constrained
with three auto dimensions.
These auto dimensions.
Again, I have the switch turned off.
So if I turn that switch on, you'll see those dimensions.
Remember, if it's an auto dimension,
you can see that it's kind of under intensified.
It has a value associated to it,
but if I grab one of the curves and move that curve,
you'll see those dimensions update.
And they're not necessarily fixed.
What the system's doing is, that it's basically
guessing at a bunch of dimensions.
So they're not hard dimensions,
they're not dimensions that are locking anything down.
It's just the way the system is telling you
that you need some additional constraints
to fully constrain the sketch.
We're optimally looking for a fully constrained sketch.
So this is telling me I am minimally
have three more constraints.
And I'm gonna use some of these and draw some of my own.
So, for this, if I come in and double click on a constraint.
Let's say like the angular constraint.
As soon as you double click on it,
it's going to go into the Dimension Editor.
And, here, I can input the value that I want, hit Enter.
And then I'm just gonna close.
You'll notice that once I give it
a actual true constraint value, a couple of things happen.
Turns blue.
So, as you can see here,
this is basically a strong dimension.
It's a hard dimension, it's not going anywhere.
Only way it'll move is if I double click on it,
make a adjustment to that dimension.
You'll notice if I grab it and try to move it and change it,
it's not going anywhere.
The other dimensions are,
cause they're still in auto dimension.
Now, if I come in and go into, let's say, Rapid Dimension,
you'll notice, under Rapid Dimension,
I have Method Inferred as set.
This'll cover most of the dimensions that you want.
But let's say I didn't want this to be a radius.
I can come in here, I can say Diametral, I can pick that,
and now I can change that dimension.
You'll see the auto dimension automatically goes away.
So it's not gonna cause any problems.
There's no conflicts there.
Because the system knows that I'm applying a dimension.
The auto dimension's gonna go away now.
This dimension will not delete.
So if I try applying something, again, to this,
this system's gonna let me know.
So, in this case, I'll just say I want this at 100.
If I, let's say, change this to Radial,
and try picking this again, and placing that dimension,
you'll see, oh, everything pops up red.
I have a couple of constraints on one curve.
And you'll see it's telling me
that I have an issue with those constraints.
The issue is that it's over constrained.
I have two dimensions telling this arc to do something.
I only need to use one of them.
So you just need to either undo, in this case,
or, if you've gone a step ahead,
you can just right mouse click on something and say delete.
So I have the dimension that I want.
Next, I want to constrain the height.
So I'll just go into Rapid Dimension, pick my line.
Oh, man, I can't pick my line, why can't I pick my line?
And the reason is my Measurement Method.
It's currently set to Radial.
So, if you can't pick something,
remember, your selection intent and your filters,
there's something there that's locking you out.
So, in this case, this is a line, it's not an arc.
There's no radius there to be had.
So I need to change that.
And, in this case, maybe I just wanna go Perpendicular.
I wanna measure from this bottom line up to that arc.
And place that dimension.
And, again, just simply enter in what I want, hit my Enter.
I'm gonna close this out.
And now I have a fully constrained sketch.
So I'm gonna hit Finish.
I'm gonna hide this sketch.
I'm gonna show this sketch.
Again, just simply right mouse clicking.
I'm gonna double click on this sketch.
And you'll see here, because in the last sketch,
I turned that switch on to show the auto dimensions,
that's this guy,
I have two constraints that need to be applied to this.
So if I double click on this dimension, make a change, done.
I'm just gonna close that out.
If I were to come in here and do something like
pick this line and this line,
and now make them equal length,
you'll notice, again, that auto dimension just disappears.
The systems knows it's no longer needed and it goes away.
If you don't want that,
maybe you realized, aye, I want that dimension back,
well, in this case, I would have to delete that dimension.
And as soon as I delete that geometric constraint,
you'll see the auto dimension pops right back on.
And, in this case,
I'm just gonna double click on that dimension
and apply the value that I want.
Hit Close.
So now you see this line and this line are equal.
Both of them are equal to 150ML.
The reason I know this
is because I have this vertical constraint
between this point and midpoint,
so that means this is gonna be balanced
across that vertical line.
So, using your geometric constraints,
using your dimensional constraints,
you wanna make sure that you're careful
how you apply your constraints.
You wanna apply them in a fashion
in which that it makes sense to the model.
As far as for update purposes.
A lot of people are in the habit of trying to dimension
their sketch in a way that inspection may like it,
or manufacturing may like it.
And that's not always the best case scenario.
What inspection wants,
and how you make modifications to the part,
are two very different things.
What manufacturing wants and, again,
how you make modifications to the part
are gonna be two very different things.
As you go along, what you have here, in a sketch,
may appear very different
than what you would see on the drawing.