Creating Inferred Constraints In AutoCAD

Creating Inferred Constraints

With the Infer Constraints button active at the status bar, you can automatically create constraints

while drawing a sketch.

 Activate the Infer Constraints button at the status bar.

 Click the Fillet button on the Modify panel of the Home ribbon.

 Select the Radius option from the command line and enter 50 as the radius.

 Create a fillet at the lower left corner of the sketch.

You will notice that Tangent and Coincident constraints are applied, automatically.

 Click the Concentric button on the Geometric panel.

 Select the circle located outside the loop and the fillet; they both will be concentric.

 Use the Radius tool from the Dimensional panel and apply the radius dimensional

constraint to the fillet.

 Open the Parameters Manager palette and modify the rad2 value to 3/2*dia1, as shown.

 To hide all the Geometric Constraints, click the Hide All button on the Geometric panel.

 Similarly, click Hide All on the Dimensional panel to hide all the dimensional constraints.

 To modify the size of the drawing, change the value of dia1 in the Parameters Manager

window; you will notice that all the values will be changed, automatically.

 Save and close the file.

Questions:

1. Which tool is used to make a spline continuous with another spline?

2. Which tool is used to apply constraints to the objects, automatically?

3. Which tool is used to constraint a line along another line?

4. Which tool is used to constraint a point to lie on another point or an object?

5. Where are Geometric Constraints available in AutoCAD?

Exercises

Exercise 1:

In this exercise, you need to create the drawing shown in figure and apply geometric and

dimensional constraints to it.

Exercise 2:

In this exercise, you need create the drawing as shown below and apply geometric and dimensional

constraints to it. Also, create relations between dimensions in the Parameter Manager.