How to Fix Inaccurate PDF Export Dimensions from TurboCAD
Question details
The user is experiencing slight dimensional inaccuracies (approximately 1 mm) when exporting drawings from TurboCAD to PDF, which affects rasterization and final output like laser cutting or printing.
- Product
- TurboCAD
- Device & OS
- not provided
- Scenario
- Exporting CAD drawings to PDF and rasterizing them for high-precision printing or laser cutting.
- Observed behavior
- The final PDF or rasterized output is slightly undersized compared to the original TurboCAD drawing dimensions.
Verify the exact dimensional requirements of your laser cutter or printer and ensure your drawing scale in TurboCAD is set strictly to 1:1 before exporting.
Identify the Source of the Dimension Discrepancy
Systematically measure your artwork at each stage of the workflow to pinpoint exactly where the dimensional shift occurs.
PDF creation itself does not intentionally scale pages. However, print drivers, fixed reporting resolutions, and cumulative rounding errors can shift elements slightly. Finding out whether the issue occurs during CAD export, rasterization, or physical printing is the key to solving it.
Verify the original drawing dimensions within TurboCAD using the built-in measurement tools to ensure the source file is perfectly accurate.
Open the exported PDF in your preferred PDF viewer and use the measure tool to check if the dimensions still match the original CAD file.
If rasterizing the PDF, open it in Photoshop and check the exact dimensions and DPI (Image > Image Size) to see if rounding errors were introduced during import.
Print a test page directly from TurboCAD and another from the exported PDF to compare physical results. A 1 mm difference may simply be the hardware's practical tolerance limit.
Adjust Print Driver and Page Scaling Settings
Ensure your PDF printer or print driver settings are not applying automatic scaling, page fitting, or rounding resolutions.
Accurately Measure and Print PDFs with WPS Office
Use WPS Office's built-in PDF tools to open, measure, and print your exported CAD drawings without unintended page scaling. Its high-fidelity PDF rendering ensures that your vectors remain accurate for review and printing.
- 1. Open PDF in WPS: Launch WPS Office and open your exported TurboCAD PDF file.
- 2. Measure Dimensions: Navigate to the Tools tab and use the Measure tool to verify the exact distance between elements.
- 3. Print without Scaling: Go to Menu > Print. Under Page Sizing & Handling, select 'Actual Size' to ensure no automatic scaling is applied by the printer.
Frequently Asked Questions
Why does my PDF shrink slightly when I print it?
Most PDF viewers default to 'Fit to Printable Area' or 'Shrink to Fit' in the print dialogue, which reduces the drawing size to accommodate printer margins. Always select 'Actual Size' or 'Custom Scale: 100%' when printing dimensional drawings.
Can Photoshop change the dimensions of my PDF?
Yes. When opening a vector PDF in Photoshop, it rasterizes the image based on the DPI and dimensions you input. Incorrect DPI settings or rounding during rasterization can cause slight dimensional shifts.
Is a 1 mm discrepancy normal for laser cutting?
A 1 mm variance can be significant for precision parts, but it may simply be the hardware tolerance of your printer or cutter. It is essential to test if the software export or the hardware kerf is causing the discrepancy.
