How To Reduce File Size In AutoCAD 2012?

Understanding Large File Sizes in AutoCAD

Several factors contribute to large AutoCAD file sizes, particularly DWG files. Common causes include corruption within the drawing data, or improper mapping of elements when importing from other formats, such as DGN. These can lead to an extensive object database that standard purging tools cannot handle effectively.

Removing Unused Elements

To effectively reduce the size of your DXF or DWG files, start by removing unused blocks and objects. Perpetually check your drawings for elements that no longer serve a purpose. Sometimes, after cleaning up, the file size may not shrink further due to already minimal data remaining.

Steps to Optimize Your AutoCAD File

1. Back Up Your Work: Always back up your drawings prior to making major changes or optimizations.
2. Avoid Overusing Explode: Frequently exploding blocks can create unnecessary complications and increase file size.
3. Eliminate Unused Geometries: Scan your drawing for geometry that does not contribute to your current project and delete it.
4. Identify Invisible Objects: Use the “Select All” feature and check for hidden objects that could be inflating your file size.
5. Check Layers Regularly: Delete any layers not in use; their existence can add to your file’s bulk.
6. Manage Layer Filters: Remove any layer filters that are no longer applicable.
7. Evaluate Your Styles: Review your style tables—there may be redundant styles you can delete.
8. Purge Unused Items: Run the PURGE command to systematically eliminate unused elements in your design.

Optimizing Block Sizes in AutoCAD

To reduce the size of specific blocks in your drawing, use the Select Objects tool to choose a block. Then, access the block’s properties. Specify the Height Factor and Width Factor as 1 on the General panel of the CAD Block Specification dialog. This adjustment will normalize the block size and can contribute to a smaller file.

Minimizing File Size: Practical Techniques

1. Detach Xref Files: Use the XREF command to detach any unnecessary external reference files.
2. Use the OVERKILL Command: After selecting all objects in your drawing, enter the OVERKILL command to optimize geometry by removing overlapping entities.
3. Perform a Detailed Purge: Use the -PURGE command, and ensure you check the option for Regapps to remove registered applications.
4. General Purge: Run the standard PURGE command and select all available options to clear out as much unused data as possible.

Compressing DXF and DWF Files

For DXF Files:

To compress a DXF file size effectively, open the DWG file in AutoCAD first. Utilize the PURGE command, ensuring all options are turned on. You might also want to perform a detailed -PURGE of registered applications and then run an AUDIT to check for and repair any issues within the drawing.

For DWF Files:

In the DWF output settings, locate the Custom Properties panel. Within the DWF6 ePlot Properties dialog, choose a suitable file compression option. Confirm this in the Plotter Configuration Editor and apply the changes to create a compressed DWF output.

Cleansing Your AutoCAD File

To clean and optimize a file, begin by issuing the PURGE command. This removes unnecessary and unused named objects, including layers and block definitions. Following this, employ the AUDIT command to fix any prevalent errors in the drawing.

Recovering a Corrupted AutoCAD File

If you encounter a corrupted DWG file, open it in AutoCAD and navigate to the Tools column. Select Drawing Utilities, and then choose Recover. This will facilitate automatic repair of the damaged file. Once completed, evaluate the integrity of the fixed drawing.

Quick Guide to Purging AutoCAD Files

1. Open the drawing file in question.
2. Run the AUDIT command to detect and repair errors.
3. Use the PURGE command to remove any unused named items.
4. Execute the -PURGE command to eliminate registered applications.
5. Save your updated drawing.

Adjusting Text Size in AutoCAD

1. Access the Drafting tab and navigate to the Text panel, then select Style.
2. Choose the text style you wish to modify. Input your desired height in the Height box.
3. To apply these changes to existing text using that style, click Apply.
4. Close the dialog to complete the process.

Frequently Asked Questions

1. What size is typically considered large for an AutoCAD file?

   A large AutoCAD file is generally over 20MB. However, anything exceeding 88MB is often problematic and prone to potential errors.

2. How often should I purge my AutoCAD files?

   Purge regularly, especially after major modifications, to ensure your file remains as lean as possible.

3. Can external references impact my file size significantly?

   Yes, retained external references (Xrefs) can inflate your file size significantly, especially if they are not necessary for every drawing.