AutoCAD Fillet

AutoCAD Fillet is a powerful command in AutoCAD for creating smooth, rounded corners between two lines or polylines. It helps in enhancing the aesthetics and reducing sharp edges in design drawings. This command is particularly useful in architecture, mechanical engineering, and product design industries.

Syntax

The basic syntax for using the AutoCAD Fillet command is as follows:

FILLET [options] [radius]

Parameters

The AutoCAD Fillet command requires the following parameters:

• options: Specifies the settings for the fillet operation. Common options include:
  • R: Sets the radius for the fillet.
  • TRIM: Trims the objects to the fillet radius.
  • POLYLINE: Applies the fillet operation on polylines as a whole.
  • MODE: Specifies the fillet mode.
• radius: Sets the radius of the fillet. This parameter is optional and can be omitted if the default radius is desired.

Usage

1. Launch AutoCAD and open the drawing where you want to apply the fillet.
2. Type 'FILLET' in the command line, or access the Fillet command from the Modify menu or Ribbon panel.
3. Select the first line or polyline segment to fillet.
4. Select the second line or polyline segment to fillet.
5. Specify the fillet radius, or press Enter to accept the default radius.
6. Choose the desired fillet options, such as trim, polyline, or mode.
7. Continue selecting additional line or polyline segments to apply the fillet, or press Enter to finish the command.

Note: The fillet operation can be undone using the 'Undo' command or by picking 'Fillet' from the 'Modify' menu and selecting 'Remove' option.

Examples

Here are a few examples that demonstrate the usage of the AutoCAD Fillet command:

Example 1

To fillet two intersecting lines with a radius of 1 unit and trim the excess:

Command: FILLET
Select first object or [Polyline/Radius/Trim/Multiple]: R
Enter fillet radius <0.0000>: 1
Select first object or [Polyline/Trim/Multiple]: Trim
Select first object or [Polyline/Radius/Trim/Multiple]: Line
Select first line: (select the first line)
Select second line: (select the second line)

Example 2

To fillet two intersecting lines without trimming and with a radius of 0.5 units:

Command: FILLET
Select first object or [Polyline/Radius/Trim/Multiple]: R
Enter fillet radius <0.0000>: 0.5
Select first object or [Polyline/Trim/Multiple]: Line
Select first line: (select the first line)
Select second line: (select the second line)

Example 3

To apply a fillet on a polyline with a radius of 2 units:

Command: FILLET
Select first object or [Polyline/Radius/Trim/Multiple]: Polyline
Select a polyline or an arc or [Undo/Radius]: (select the polyline)
Enter fillet radius <0.0000>: 2

Conclusion

The AutoCAD Fillet command is a valuable tool for smoothly connecting lines and polylines with rounded corners. It allows programmers to automate the process of creating fillets in their designs, enhancing productivity and accuracy. Experiment with different options and radii to achieve the desired design aesthetics. Happy coding!