The new Weld Seam Detector SND40 made by Roland Electronic features a combination of magnetic flux leakage and eddy current technology. Weld seam detection in tubes is still a demanding task. Improvements in the welding technology and special treatments like drawing, annealing and straightening lead to more and more homogenous weld seams. The resultant reduced signals of the seams can be used for the reliable positioning of the tubes only when appropriate sensors and digital signal analysis are applied. The new SND40 offers a combination of digital signal analysis and eddy current technology developed in accordance to the special requirements of weld seam detection. The SND40 is designed to handle difficult positioning tasks in tube bending machines, hydroforming presses and other tube processing machines. The PC-based unit offers a graphical user interface with a touchscreen and modern interfaces (fieldbus, ethernet). It can used for tubes made of all metals with a diameter ranging from 5 to 500mm and is largely independent of the tube wall thickness.
