How To Change Thickness Of Ellipse In AutoCAD?

Understanding the Ellipse in AutoCAD

An ellipse is a closed curve that can be described as the set of points where the sum of the distances from two focal points is constant. In AutoCAD, this shape can be generated using various methods, but true ellipses in their fundamental form do not possess physical thickness. However, the representation of an ellipse through a 2D polyline allows users to add thickness.

Step-by-Step Process to Change the Thickness of an Ellipse in AutoCAD

Step 1: Create a Polyline Ellipse

1. Activate Polyline Ellipse Mode: Begin by entering PELLIPSE at the command line. Set this variable to 1. This configuration allows you to draw ellipses as polylines.

2. Draw the Polyline Ellipse: Utilize the Ellipse tool from the Draw panel. Specify the endpoints of the major axis and then define the minor axis’ length by clicking again.

Step 2: Adding Thickness to the Polyline

1. Select Your Ellipse: Click on the polyline ellipse you created to highlight it.

2. Access Properties: Right-click on the selected ellipse and choose Properties from the context menu. This will open the Properties palette, where you can modify various attributes.

3. Modify Thickness:
   • Locate the section labeled Thickness.
   • Input your desired thickness value. This will change the appearance of the ellipse to reflect the specified thickness.

Step 3: Additional Adjustments (if necessary)

1. Editing the Polyline: If you want to refine the ellipse further, you can use the PEDIT command:

   • Type PEDIT in the command line and select your ellipse.
   • Choose the option to modify vertices, widths, or join it with other polylines as needed.
2. Saving Your Work: After making all necessary changes, save your drawing to retain all modifications.

Changing default thickness for new Polylines

When you want all newly created polylines—including ellipses—to default to a specific thickness:

1. Modify Global Width Setting:

   • Enter the PLINEWID command in the command line.
   • Set the value to your preferred width.
2. Save as Template: If you want this setting to be available in future design sessions, save your drawing as a template for continued use in subsequent projects.

Frequently Asked Questions

How can I ensure my ellipse remains editable after modifications?

Make sure that the PLINETYPE system variable is set to 0. This ensures that your polylines, including ellipses, do not lose their editable properties once placed in the drawing.

Is it possible to revert an ellipse back to its original state after editing?

While the original true ellipse cannot have its thickness changed, you can always create a new polyline ellipse with the PELLIPSE command and start fresh if needed.

How do I change line thickness for shapes other than ellipses in AutoCAD?

Select the desired shape, right-click to access the Properties palette, and adjust the Thickness option similar to modifying the ellipse. For global changes, consider using the Plot Style Table Editor under the Layout tab for overall line thickness settings.