- [Instructor] Hey guys,
let's learn about ordinate dimensions.
Now ordinate dimensions are a really quick way
to add a whole bunch of dimensions
in a very compact manner on your drawings.
And to do that, let's go up here
under the Smart Dimension tool, click on the twirl down
and come down here to Horizontal Ordinate Dimension.
Click on that one there.
Now my very first click is got to be your baseline.
Where do you want to start all your dimensions from?
So I want to choose this edge right here
and then drag that down a little bit,
which is going to be my zero mark and there it is.
Okay.
Now, anything you want to add to this dimension,
it's a chain dimension.
So anything you want to add to it, you just click on it.
It's pretty straight forward.
So if I want to add this hole here, just click on the hole
and just add it to the chain.
This hole right here? Sure.
This one up here? Sure.
This edge right here? Yeah.
Center line of that? Sure.
So look how quickly we can add all these dimensions.
I can just go across my part and add all those dimensions
and they all show up in this ordinate dimension format.
And if you forget something,
so say you get out of here and all of a sudden,
like this dimension here, wasn't add.
Like I can delete it out of there.
And you want to go back here and modify your dimension.
I can right click on any one of the dimension values
and say Add To Ordinate.
Click on that and then I can add a new one in.
So pretty straightforward and easy to do.
I can do exactly the same thing going in a vertical manner.
So come over here to the twirl down
and look we'll click Vertical Ordinate Dimension.
I'm going to choose the baseline as this part right here.
And then again, just click on individual items
to bring them into my dimensioning scheme.
As I go, here they are.
Now you can do the same thing on the other side,
if you want.
So over here, I can say, hey, I'd like to add one more
of those Vertical Ordinate Dimensions.
Add that same zero mark 'cause it is at the same baseline.
And then go ahead
and add a few other dimensions on that side.
And that works as well.
So if your drawing
is getting a little bit too cluttered on one side,
of course you can add them to the other side as well.
All right, now,
my second example is a circular running dimension.
And right over here, I've got a bunch of holes
or bolt hole circle.
And down here under the twirl down,
I have what's called a Angular Running Dimension
which is basically an ordinate dimension
that goes around in a circle.
So click on that.
And my base point that I want to choose
is this one right here.
So I'm going to choose this hole as my zero mark.
And then I can choose the individual holes as I go around.
Oh-oh, hold on, hold on here.
What happened?
Let's get rid of that.
Delete.
Let's go back and try that one more time.
All right, so this one
is going to be the Angular Running Dimension.
Choose a hole to start from and then from there,
we're going to be choosing those individual circles.
And notice we get these little lines that pop up.
As we go around our circle,
those dimensions just pop up as they go.
So keep in mind, they're all starting from the zero mark
and working their way around the circle.
So that is a Angular Running Dimension.
And my other dimension scheme here
was Regular Ordinate Dimensions
in both horizontal and vertical.
If you have a ton of things to dimension in your drawing,
and regular dimensioning schemes
just are going to look like a total mess,
these ordinate dimensions are really a great alternative.
And they're quick and easy to add
especially if you're doing things like sheet metal parts
or just again, just like a ton of hole or ton of things
that you need to dimension in a quick and small area,
choose the ordinate dimension.