How to create a parametric drawing in AutoCAD

All commands of this functionality are in the Parameterization menu.

The term parameterization means that the dimensions of 2D objects are set in the form of parameters that can have values, including in the form of a formula containing other parameters.

Consider a simple example of creating a rectangle in which one side will always be twice as large as the other.

First, use the _line command to create an arbitrary rectangle.

Next, we impose geometric dependencies on individual elements of our drawing (lines, points) by choosing the corresponding item in the Parameterization menu.

In particular, we use the coincidence between the points of the lines and the perpendicularity between the three lines, as well as the horizontalness of one of the horizontal lines of the rectangle.

We set the dimensional dependencies by choosing the appropriate menu item Parameterization.

We will choose one size horizontal and the other vertical values ​​will be left by default. Next, change the values ​​of the size parameters by double-clicking on the corresponding size. The value of the vertical dimension parameter d2 is set to 200, and the horizontal parameter size d1 is set in the form of the formula d2 * 2. Now, when d2 (vertical size) changes, the d1 parameter (horizontal size) will automatically change and will always be twice as large.