Understanding the Trim Tool in AutoCAD 2018
The Trim function in AutoCAD is a powerful feature that allows users to cut or modify objects by removing portions that extend beyond specified boundaries. Here’s a detailed guide on effectively utilizing the Trim command in AutoCAD 2018.
Step-by-Step Guide to Using the Trim Command
Step 1: Access the Trim Tool
- Navigate to the Home tab on the ribbon.
- Look for the Modify panel.
- Click on the Trim icon (typically represented by a pair of scissors).
Alternatively, you can type TRIM in the command line and press Enter to initiate the command directly.
Step 2: Define Cutting Edges
- After activating the Trim tool, you’ll be prompted to select the objects that will serve as cutting edges. These can be lines, circles, or other shapes.
- Carefully select the desired cutting edges by clicking on them. Once you have selected all necessary edges, press Enter to confirm your selection.
Step 3: Execute the Trim Action
- Now, select the objects you want to trim. These are the items that will be affected by the previously defined cutting edges.
- Click on the objects you wish to trim one by one. After making your selections, press Enter to apply the changes.
Troubleshooting Trim Issues
If the Trim tool does not function as expected, consider these common issues:
-
Ensure that the PICKADD variable is set to 2. This setting allows you to pre-select objects before activating the Trim command. To check or change this setting:
- Type PICKADD into the command line and press Enter.
- Adjust its value to 2.
- If the issue persists, initiate the Trim command from the command line by typing TRIM and pressing Enter again before attempting to make selections.
Using TRIM in 3D Space
In AutoCAD, the TRIM command works effectively in 3D space as well. It trims only those objects that intersect with the specified cutting edges, taking into account the projection onto the XY plane of the current User Coordinate System (UCS). Make sure that your 3D objects are positioned correctly for the trimming to be successful.
Difference Between Trim and Erase
Understanding when to use Trim versus Erase can enhance your design process. While Trim modifies the geometry by cutting off parts that encroach upon the defined edges, the Erase command permanently removes objects from the drawing area. Trim allows for adjustments without permanently deleting, while Erase is definitive.
Frequently Asked Questions
1. What types of objects can I trim in AutoCAD?
You can trim a variety of objects in AutoCAD, including lines, arcs, circles, and polylines. Any object that intersects with your defined cutting edges can be trimmed.
2. Why is my trimming not working on certain objects?
Trimming issues may arise if the cutting edges do not intersect the objects you wish to trim. Ensure that you are selecting appropriate edges that touch or overlap the items you want to modify.
3. Can I undo my trim actions?
Yes, if you’re not satisfied with the results of your trim action, you can easily undo the last command by pressing Ctrl + Z (or typing UNDO in the command line) to restore the objects before they were trimmed.
