Reverse Engineering &
3D Data Processing
From physical part to production-ready STEP file. Scan-to-CAD reconstruction, mesh processing, and full deviation reporting — delivered as a unified traceable workflow.
Industrial scanning engineer preparing structured-light capture — ZenCore 3D metrology lab, Budapest.
Point Cloud to
Parametric Model
Scan-to-CAD is the process of converting a raw 3D scan — a polygon mesh of millions of triangles — into a fully parametric STEP model with real engineering features: defined radii, toleranced bores, swept profiles, and editable dimensions.
The deliverable behaves exactly like an original CAD model. It can be modified by any downstream engineer, toleranced to GD&T standards, and sent directly to CNC machining, FEA simulation, or additive manufacturing without further conversion.
Why mesh-only is not enough
"A scan mesh is a dense triangular approximation of a surface. It knows nothing about design intent — a hole is just a cluster of triangles, not a diameter. A parametric CAD model knows."
Dense point cloud captured by ZEISS ATOS Q — 0.02 mm point spacing. Each point carries XYZ coordinates and surface normal data for downstream reconstruction.
Reconstruction Process
Reference alignment
Raw scan is imported and aligned to a stable datum. Multiple scan positions are registered together with sub-0.01 mm accuracy.
Feature identification
Planes, cylinders, fillets, and freeform surfaces are identified and mapped against the mesh geometry for parametric reconstruction.
Parametric modelling
SOLIDWORKS or Fusion 360 is used to build feature-by-feature — sketch profiles are created from mesh cross-sections, ensuring manufacturing intent is captured, not just surface shape.
STEP export & QA
Completed model is exported in the required format and validated against the original scan before delivery.
Technical Specifications
Deliverables include
- Fully parametric STEP model
- Native CAD file (SOLIDWORKS or Fusion 360)
- Colour deviation report (PDF)
- Dimensional inspection table (GD&T)
- Scan mesh archive (STL)
Raw Mesh Cleanup & Export
Not every project requires full CAD reconstruction. Scan-to-Mesh delivers a clean, watertight polygon mesh — free of noise, scan artefacts, and coverage gaps — ready for rendering, simulation, rapid prototyping, or as a reconstruction reference.
Clean watertight mesh after professional processing — artefacts removed, normals unified, density optimised for downstream application.
Supported Export Formats
.STL
Universal 3D print
.OBJ
+ MTL texture support
.PLY
Point cloud data
.FBX
Game engines / VFX
.GLTF
Web & AR delivery
.JT
Industrial viewers
Mesh Processing Pipeline
Registration & alignment
Multiple scan passes are registered into a single unified point cloud using RMS-optimised best-fit alignment.
Noise & outlier removal
Statistical outlier filtering eliminates scanner noise and environmental reflections without affecting true surface data.
Mesh generation
Poisson or ball-pivoting reconstruction creates a closed manifold mesh from the cleaned point cloud at the target resolution.
Hole filling & smoothing
Scan coverage gaps are interpolated. Non-manifold geometry, degenerate triangles, and inverted normals are resolved.
Optimisation & delivery
Mesh density is decimated to target polygon count. Final QA against raw scan confirms no geometry loss before export.
Choose Scan-to-Mesh when you need
- A clean mesh for 3D printing or rapid prototyping without CAD modelling
- Organic or freeform geometry that is not practical to parametrise
- Game, VFX, or AR assets from physical objects
- Pre-processing for photogrammetry texture baking
- Reference geometry for downstream CAD construction
- Heritage or archival digitisation at maximum fidelity
CAD Comparison & Tolerance Reporting
Deviation analysis overlays a physical scan against its nominal CAD model, producing a colour-coded deviation map and structured inspection report. Every surface deviation is quantified, classified against design tolerances, and formally documented.
Deviation Scale
CMM and GOM Inspect colour-deviation analysis — green indicates nominal zone (±0.05 mm), warm colours indicate positive deviation, cool colours indicate undersize.
What the Inspection Report Contains
Full-surface colour map
Every point on the scanned surface is coloured by deviation from nominal CAD. Hotspots and undersize regions are immediately identifiable.
Feature inspection table
Critical dimensions — bores, bosses, flatness, perpendicularity — are tabulated with nominal, actual, deviation, and pass/fail status.
GD&T callout reporting
Geometric tolerances defined in the design drawing are evaluated and reported: position, concentricity, flatness, cylindricity, and profile.
Statistical summary
Worst-case, mean, RMS, and Cpk values per feature set. First Article Inspection (FAI) format available on request.
Technical Specifications
Typical Applications
First Article Inspection (FAI)
Initial production batch qualification
In-process quality check
Mid-run sampling against CAD master
Supplier qualification
Third-party part acceptance
Reverse engineering validation
CAD reconstruction accuracy proof
Tooling wear monitoring
Mould / die delta analysis over time
Failure investigation
Out-of-tolerance root cause analysis
Standalone service
Deviation analysis can be ordered independently — ship us your parts and nominal CAD files. No prior scanning or reconstruction work required.
Request standalone inspectionScan → Processing → Modeling → Validation → Manufacturing
A fully traceable five-stage workflow. Every stage produces a documented output — no black-box handoffs, no data loss between steps.
Physical Scan
The physical part is captured using ZEISS ATOS Q structured-light scanner or TomoScope XS Plus CT scanner. Dense point cloud at 0.02 mm resolution is generated, covering all functional surfaces including hidden internal geometry.
The physical part is captured using ZEISS ATOS Q structured-light scanner or TomoScope XS Plus CT scanner. Dense point cloud at 0.02 mm resolution is generated, covering all functional surfaces including hidden internal geometry.
Raw point cloud is registered and converted to a watertight STL/OBJ mesh. Noise, scan artefacts, and coverage gaps are resolved in GOM Inspect. Mesh density is optimised for downstream reconstruction without sacrificing surface accuracy.
Clean mesh is used as a reference surface to rebuild a fully parametric STEP model in SOLIDWORKS or Fusion 360. Revolves, extrudes, and loft features are applied to reflect original manufacturing intent — not just the scanned geometry.
Reconstructed CAD model is overlaid against the scan mesh in GOM Inspect. A colour-deviation map confirms all critical features are within ±0.05 mm of the physical reference. Full inspection PDF with GD&T callouts is issued.
Validated STEP file enters production directly — SLS, SLA, FDM, vacuum casting, or CNC machining. The same file drives all downstream workflows. DFM review is available if legacy geometry requires optimisation before manufacturing.
DFM Optimisation
Reverse-engineered models frequently contain legacy geometry. DFM review identifies and corrects wall thickness, draft angle, and support issues before production.
DFM Optimisation3D Printing
Validated STEP files flow directly to SLS, SLA, or FDM production. The same validated data file drives all downstream manufacturing without re-conversion.
View machinesReady to start your project?
Ship us the part or send your scan data — we'll scope the project, confirm accuracy requirements, and deliver documented results ready for production.