In many manufacturing and maintenance companies the same problem recurs: there is a part but no technical drawing or CAD model. It may be an old machine component, a worn spare part or something the manufacturer no longer supports. The solution is 3D scanning and reverse engineering.

🔍 What is 3D Scanning?

3D scanning digitally reproduces a physical object. The scanner captures data about shape, surface and geometry, creating a point cloud — millions of points representing the object with high accuracy.

🧬 What is Reverse Engineering?

Reverse engineering converts a 3D scan into a usable CAD model. The result: a 3D model ready for production, a technical drawing with dimensions and tolerances, and files for wire EDM or CNC programming (DXF, STEP, IGES).

⚙️ The Process Step by Step

  1. Scanning the part — the component is scanned, creating a point cloud and mesh
  2. Data processing — noise removal, gap filling, surface smoothing
  3. Creating the CAD model — parametric model in SolidWorks or MegaCAD
  4. Verification — comparison with the original, dimensional inspection
  5. Production preparation — STEP/DXF export, CAM programming, wire EDM or CNC production

🏭 When to Use 3D Scanning?

  • No technical documentation — you have the part but not the drawing
  • Worn or damaged components — need to recreate or improve the design
  • Modernisation — upgrading an existing design to new requirements
  • Spare part production — parts no longer available from the manufacturer

📏 Accuracy and Indicative Costs

Modern industrial scanners achieve accuracy from 0.01 mm to 0.05 mm. Indicative cost: simple parts from a few hundred £/$, medium complexity £500–1500, complex parts — several thousand. The largest cost element is creating the parametric CAD model.

💡 How to reduce cost: Provide an undamaged part, specify accuracy and application requirements, include any existing photos or notes about the material.

🔗 3D Scanning + Wire EDM — The Perfect Combination

3D scanning works perfectly with wire EDM production: scan → CAD model → CAM program → production. This allows you to recreate any component, produce it in series and modify the design without documentation limitations.