CVS Trevista X4: 4th Generation surface inspection from Stemmer

These new Trevista X4 models utilise a patented 2.5D process, called Shape from Shading, and are especially suited to the examination of components with shiny and diffusely scattering surfaces. Surface defects such as scratches, burrs, dents, discolouration or grinding marks, even if only a few micrometres deep can be detected with significantly greater certainty with this process than with conventional image processing systems.

The X-4 generation offers structured, diffuse dome illumination that is brighter by a factor of 2.5 compared with the previous models, enabling faster image acquisition. For a typical image size of 4 Mpixels, evaluation using the Trevista algorithm takes place around 20 per cent faster than before, which results in potentially lower cycle times.

Depending on the application, the new models also provide a measuring field that is larger by up to 50 per cent. In the smallest version, the diameter of the measuring field is increased from 20 to 30mm and in the medium-sized variant from 50 to 75mm, without any change to the physical mating dimensions of the lighting domes. The largest Trevista variant continues to have a measuring field diameter of 200mm.

The system controller has been reduced to approximately 30 per cent of the installation space of its predecessor. In addition, the controller electronics have been completely reworked and temperature monitoring of the lighting and the controller has been integrated. To simplify installation and operation, a parameter setting tool is provided to set up the system.

These new CVS Trevista X4 models can be supplied as complete systems. In addition to the lighting unit, they also include the appropriate lens for the particular application, the matching camera, a PC and a choice of software packages between Sherlock from Teledyne Dalsa or Stemmer Imaging's own Common Vision Blox library.

With industry-standard design, all Trevista models integrate easily into the production process. The complete systems are assembled in accordance with customer requirements and delivered fully tested, thus enabling users quickly to put them into service in their installation. For effective on-the-job training on Trevista systems, Stemmer Imaging provides special courses at the European Imaging Academy.

CVS Trevista Surface and CVS Trevista Cylinder can be used for the inspection of flat, stationary component surfaces or cylindrical shell surfaces respectively. CVS Trevista Multiline is used for the examination of components in rotational or translational motion.

Go to www.stemmer-imaging.co.uk for more information about the new CVS Trevista Surface, Cylinder and Multiline surface inspection systems.