The tools of 3D digitizers can be helpful for reverse engineering. With a digitizer, you can generate a computer model from a physical object by sampling 3D coordinates one at a time to create input curves for surfacing commands. Since each surfacing command requires specific input curves, an experienced Rhino modeler must decide the best surface creation tools to use to duplicate an object's shape. With a 3D digitizer, you can sample the points needed to create the required input curves.

3D digitizers can also be used for inspection. By sampling points in critical areas on the physical model and comparing those points to a digital model, you can judge the accuracy of the digital model.

Learn how to connect your digitizing arm to Rhino, calibrate probes, and orient Rhino with the real world:

• Getting started with MicroScribe - YouTube videos from GoMeasure3D.com.
  
  • How To Use Rhino 5 With A MicroScribe System
  • Using a MicroScribe arm and Rhino to do inspection

• Getting started with FARO - For Rhino V3 (2003)
  

• Getting started with CimCore - For Rhino V3 (2003)
  

These documents have been around a while but apply to any digitizing arm and version of Rhino.

• Leapfrogging - Digitize objects larger than your arm
  
• Ball tip compensation - Learn how to digitize using ball tip probes
  

• Reverse engineering resources page
• Reverse engineering posts in the Rhino blog