Scanner Welding System
3D-Welding on the fly

The Scanner Welding System (SWS) is a rapid beam deflection device for robot guided, multi-spot welding in combination with a solid state laser. The collimating module, two rotary deflecting mirrors and a F-Theta lens are integrated in the scanner head for focussing. The high-quality laser beam of a diode pumped solid state laser goes through optical fibers to the scanner head, where it is reflected and positioned at extremely high speeds by the galvanometric mirrors towards two axes. In this configuration, the SWS provides a working area of 200 x 240 x 80 mm3. The z-axis focus position is achieved with the use of a linear collimating module.

Innovative System Solution
When combined with a robot, the new scanning technique, SWS, allows multi-spot welding of complex 3D components. By coupling all three scanner axes with those of the robot, the system altogether has nine accessible axes.

No Compromise
No matter if spot, circle, wave or quilting weld – the weld geometry can be programmed freely, which means it can be adjusted to the requirements of the component and its resistance. Thanks to the real-time application of the geometric data by the control and the cheval glasses in the scanner head, the laser beam can be positioned very rapidly in the operating range (< 10 m/s within the working area). The robot movements and speeds are optimized with a complete offline programming (“Teachen“). Additionally, the software calculates the track inaccurateness of the robot so that iteration accurate to < 0.1 mm is possible.

Maximum Laser Efficiency
SWS can be operated with diode pumped solid state lasers up to 4 kW output. An efficient reduction of non-productive time allows the increase of turn on time from typically 30 % to over 80 % (“welding on the fly“). That leads to a quick Return on Investment.