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FAQs

Are dimensional measurement and GD&T (Geometric Dimensioning and Tolerancing) evaluation possible?

Category
Micro CT Scanners FAQ

Yes. In addition to high-precision dimensional measurements, our systems can be equipped with an optional software module for Geometric Dimensioning and Tolerancing (GD&T) evaluation based on engineering drawings. This allows you to use your CT system much like a conventional Coordinate Measuring Machine (CMM).

The standard software package includes basic dimensional measurement functions for accurately measuring distances, angles, and diameters on the CT data in a non-contact manner. This is exceptionally powerful for evaluating features inside a product that are inaccessible to physical metrology tools.

For customers requiring more advanced quality control, the optional GD&T evaluation software enables you to import a 3D CAD model and align it with the CT scan data. The software then automatically evaluates and verifies form tolerances (e.g., straightness, flatness, circularity) and orientation/location tolerances (e.g., parallelism, perpendicularity, position) as specified on the drawing.

Benefits of GD&T Evaluation:

  • Comprehensive, Full-Surface Inspection:

    Unlike a CMM which measures discrete points, CT captures the entire geometry of the part, allowing for a complete GD&T evaluation of all surfaces at once.

  • Non-Destructive Internal Evaluation:

    Assess the position and fit of internal components within a final assembly without disassembly.

  • Accelerated Inspection Time:

    The software automates the complex and time-consuming process of GD&T evaluation, significantly reducing inspection time.

  • Intuitive Visualization:

    Deviations from the CAD model are displayed as a 3D color map, providing an immediate and intuitive understanding of which areas are out of tolerance and by how much. This enables rapid feedback to the manufacturing process.

With this capability, Matsusada Precision's CT systems provide an end-to-end solution, from visualizing internal structures in R&D to verifying final product dimensions and geometric tolerances in a production environment. Please note: While our CT systems provide highly accurate dimensional data, they are designed for industrial inspection and analysis. For applications requiring certified metrology, it's important to be aware that they are not formally classified as X-ray CT measuring instruments that guarantee the dimensional accuracy values specified in the VDI/VDE standards.

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