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Documentation Index

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3D Auto-Dimensioning is a growing set of precision 3D measurement Tools available in Dimensioning Mode. It is powered by Voyager’s full-resolution reconstruction data and provides the foundation of an ever-growing suite of GD&T evaluation Tools. The suite ships with Voyager 2.0 and is designed initially to comply with ASME Y14.5-2019. Expect rapid updates as the suite expands and as we weave this functionality throughout Voyager. 3D Auto-Dimensioning in action

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What’s included

Direct Dimensions

Distance, Angle, and Diameter measurements between extracted features, with tolerance and pass/fail color coding.

Flatness

GD&T Flatness evaluation on any plane feature, with erosion and tolerance controls.

Datum Definition

Define Plane, Axis, and Midplane datums on parts and CAD to support datum reference frames and Profile.

Profile

Full-part and per-feature Profile evaluation against an uploaded .STEP model with datum simulation.

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Automatic Feature Extraction

Dimensional features are geometric primitives extracted from full-resolution reconstruction data. Entering Dimensioning Mode allows the user to kick off extraction on a per-reconstruction basis. The returned features are:
  • Planes
  • Cylinders
  • A full-part mesh used for Profile Analysis
Extraction uses a proprietary, high-precision feature-extraction process that operates on the full resolution scan to generate sub-voxel, reliable boundaries. The resulting primitives are the inputs to every Tool in the suite — Direct Dimensions, Flatness, Datums, and Profile all consume these extracted features rather than raw voxel data. Automatic Feature Extraction returning planes and cylinders
Feature extraction runs once on the parent reconstruction, and every ROI built on that reconstruction inherits the resulting features. Adding or editing an ROI does not re-run extraction; the same extracted planes, cylinders, and full-part mesh are surfaced across all child ROIs.
Extraction works best on monomaterial, low-attenuation parts. Mixed-material assemblies and high-attenuation alloys may produce noisier features; reach out to Lumafield to discuss your application.
Work with Lumafield to integrate Auto-Dimensioning into Recipes for fully automated GD&T runs across a fleet of scans.

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Working with an oriented ROI

All measurements should be performed on an ROI that roughly orients your part to the correct orientation. This is a critical step that will ensure your measurements are oriented to your part properly.
Today, you create that orientation manually using the rotation handles in the ROI Workflow. In future iterations Voyager will include the ability to orient your part and create an ROI from found features automatically. A small amount of upfront alignment work in the ROI step pays dividends — every Direct Dimension, Datum, and Profile evaluation downstream inherits that part coordinate system.

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Visualizing dimensions

After a measurement is created, use the leader-line controls in the Attributes Panel to choose the correct orientation and offset of the dimension callout. Adjustments are non-destructive — the underlying value does not change, only the placement of the leader and label in the Viewport. This makes it easy to keep complex scenes readable when stacking many measurements on a single ROI.

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Standards and roadmap

The Tools in this release are designed to comply with ASME Y14.5-2019. Support for additional standards (such as ISO 1101) will be added over time. On the near-term roadmap:
  • Profile probing for direct deviation readout against the nominal CAD
  • Expanded datum support beyond Plane, Axis, and Midplane
  • Auto-orient and auto-ROI from features so Dimensioning can begin without a manual orientation pass