In this lesson you will learn about sketch dimensions 2
in the contextual sketch environment. 3
You can use sketch dimensions 4
to control the size and position of your geometry. 5
The default shortcut for sketch dimensions is D. 6
It's easy to add dimensions for different types of geometry. 7
Just press relevant lines or points in your geometry and add a value. 8
A dimension can both be driving and driven. 9
Driving dimensions are the default dimension type. 10
Those dimensions drive your design. 11
For example, when I make this line 100mm, the design updates. 12
Your dimension will be driven if the sketch becomes overconstrained. 13
For example, this perpendicular constraint indicates 14
that the angular degree between the lines will be 90 degrees. 15
Therefore, I can't add a dimension here that breaks to rule. 16
Your dimension will be driven, flexible, and determined by other dimensions. 17
This dimension is presented in parenthesis and grayed out. 18
You can reference dimensions. 19
This is useful when you work with parametric modeling 20
and can save you a lot of time and increase quality 21
since the probability of mistakes can decrease. 22
I'll use a circle in this example, but other types of geometry are fine as well. 23
Add a dimension to the first circle. 24
Add another dimension to the second circle and click the first dimension. 25
fx indicates that this is a referenced dimension. 26
Change the first dimension and the second dimension 27
follows. 28
You can add formulas to dimensions. 29
Imagine that you want this circle to always be 30
20% larger than the referenced circle. 31
Select your reference times 1.2 or 1,2. 32
Your formula is okay if the text turns black. 33
And that's it for dimensions for now. 34
We'll put it more into practice later in the course. 35
Thank you.