How to Use the “Purge” Command in AutoCAD and NanoCAD

Managing drawings effectively in CAD software often requires removing unnecessary or unused items like layers, blocks, or line types. Both AutoCAD and NanoCAD offer a “Purge” command for this purpose. Here’s a detailed guide on how to use the “Purge” command in each program to streamline your projects and maintain optimal performance.

Why Use the Purge Command?

Over time, your CAD files can accumulate unused data, such as:

• Empty layers
• Unused blocks
• Obsolete line types
• Redundant styles

These items can bloat file sizes and affect performance. Purging cleans up this data, reducing clutter and improving efficiency.

Using the Purge Command in AutoCAD

AutoCAD’s “Purge” command offers a straightforward way to remove unused elements. Follow these steps:

1. Open the Drawing

Ensure you have the drawing you want to clean up open in AutoCAD.

2. Access the Purge Command

You can access the “Purge” dialog in several ways:

• Type PURGE in the command line and press Enter.
• Navigate to the Manage tab on the ribbon and click Purge in the “Cleanup” panel.

3. Understand the Purge Dialog

The Purge dialog box is divided into sections:

• Tree View: Lists all categories of items that can be purged.
• Preview Area: Displays specific items under a selected category.

4. Select Items to Purge

• Expand categories to see individual items.
• Check the box next to items or categories you wish to purge.
• To purge all items, select the “Purge All” button.

5. Confirm the Purge

AutoCAD may display a warning message for dependent items. Confirm to proceed with the purge.

6. Run the Audit Command (Optional)

After purging, use the AUDIT command to check for errors and further clean your file.

Tips for AutoCAD Purge Command

• Layer Dependencies: Be cautious when purging layers with dependencies. Check if any objects are assigned to those layers.
• Save Before Purging: Always save a backup of your file before running a purge.

Using the Purge Command in NanoCAD

NanoCAD also offers a “Purge” command, which works similarly to AutoCAD but has slight interface differences.

1. Open the Drawing

Load the NanoCAD drawing file you wish to clean up.

2. Access the Purge Command

You can access the Purge command by:

• Typing PURGE in the command line and pressing Enter.
• Clicking Tools > Purge from the main menu.

3. Navigate the Purge Dialog

• Categories Section: Lists the types of items (e.g., blocks, layers).
• Details Section: Shows specific items within each category.

4. Purge Unused Items

• Select the category and click on individual items or use the “Purge All” option.
• Confirm deletion if prompted by NanoCAD.

5. Verify Results

After purging, review your drawing to ensure no essential elements were removed accidentally.

Tips for NanoCAD Purge Command

• Efficient Selection: Use the details section to review unused items before purging.
• Check Dependencies: NanoCAD also alerts you about dependencies; review them carefully.

Best Practices for Both Platforms

Save Regularly

Before purging, save your work under a different name to preserve the original version.

Audit and Clean

Use additional commands like AUDIT in AutoCAD or similar features in NanoCAD to ensure your file is free of errors.

Batch Processing

For multiple files, consider batch purging with LISP routines (AutoCAD) or scripts (NanoCAD).

Document Standards

Maintain consistent CAD standards to minimize the need for frequent purging.

The “Purge” command in AutoCAD and NanoCAD is a powerful tool to keep your drawings lean and efficient. By understanding how to navigate the purge dialog and applying best practices, you can optimize file performance and reduce unnecessary data. Happy drafting!