How To Delete Half A Circle In AutoCAD?

Steps to Delete Half a Circle in AutoCAD

Deleting half of a circle in AutoCAD can be accomplished using various methods. Here’s a detailed guide on how to achieve this efficiently.

Method 1: Using the TRIM Command

1. Initiate the TRIM Command

   • Begin by locating the Modify panel on the Home tab. Click on the “Trim” tool or enter TRIM in the command line.

2. Select Cutting Edges

   • When prompted with "Select cutting edges…", select the circle you want to trim. This defines the boundary from which you will remove the section.

3. Specify Objects to Trim

   • After you’ve chosen your cutting edges, you’ll be prompted to select the objects to trim. Click on the part of the circle you wish to delete, which could be the upper or lower half.
4. Complete the Command
   • Press Enter to finalize your selections. The unwanted half of the circle will now be removed.

Method 2: Using the BREAK Command

1. Break the Circle

   • Access the command line and type BREAK. This tool allows you to segment the circle into different parts.

2. Select the Circle

   • Click on the circle to indicate which object is to be broken apart.

3. Define Break Points

   • Specify the two points on the circle where you want to break it. You can click at the endpoints of the segment you wish to keep.
4. Turn the Remaining Segment into an Arc
   • With the circle broken, you now have a segment. You can delete the unwanted portion by selecting it and pressing the Delete key.

Method 3: Using the FILLET Command

1. Access the FILLET Command

   • Type FILLET in the command line, or find it in the Modify panel under Home tab.

2. Set Radius to Zero

   • When prompted, set the radius to 0, which allows for a cornerless join at the circle.

3. Select the Circle and Create an Arc

   • Click on the circle and then click again to create an arc that deletes half of the circle, effectively modifying it as required.
4. Finish
   • The desired half of the circle will now be modified or removed.

Frequently Asked Questions (FAQs)

Q1: What is the difference between TRIM and BREAK in AutoCAD?
TRIM is used to cut away portions of objects (like circles, lines) based on defined cutting edges, while BREAK separates an object into two distinct parts without necessarily removing any part.

Q2: Can I undo my last action if I accidentally delete something?
Yes, you can press Ctrl + Z or type UNDO in the command line to revert the last action taken in AutoCAD.

Q3: What should I do if I cannot seem to delete the half circle?
Ensure your selection is accurate. Additionally, check if the element is locked or if your layers are appropriately set to permit modifications.