CAD Comparative Measurement Reporting: How to Present Output
CAD Comparative Measurement Reporting: How to Present Output
From 3D Scanning to Report Generation
3D scanning isn't just about capturing geometry—it’s also a critical step in verifying manufacturing accuracy. The scanned data is compared with the CAD model, and the differences are documented both numerically and visually. These reports are vital for internal quality checks and external validations.
Why Compare to CAD?
To ensure the produced part meets the design specifications, the 3D scan is aligned with the original CAD model. Deviations are then measured and analyzed. This comparison helps identify non-conformities, determine process accuracy, and builds credibility with customers.
Color Maps and Sectional Analysis
Using software like GOM Inspect, PolyWorks, or Control X, the scanned mesh is overlaid onto the CAD model. The software then calculates deviation values across the surface and displays them through a color map—green for in-tolerance, red and blue for deviations.
Additionally, cross-sections can be created to inspect dimensional metrics such as diameters, distances, gaps, and angles. This enables localized analysis beyond just global surface alignment.
These reports can include tables of measurements, deviation trends, and time-based comparisons. In serial production, this allows full traceability by archiving inspection data for each produced part.
Report Formats and Presentation Methods
Reports can be exported as PDF, Excel, 3D PDF, or interactive HTML formats. They can include company branding, language localization, and dynamic 3D visualizations—ideal for clear and professional customer presentations.
Compliance and Documentation Standards
These reports comply with ISO 9001, IATF 16949, and other quality system requirements. Measurement protocols can also be structured in accordance with standards such as VDA and ASME GD&T, ensuring that all stakeholders receive well-documented, standardized inspection results.
