Laser Distance Sensor


Optically measured welding path

The laser distance sensor tracks the programmed weld seam distance offline before starting the welding process. The sensor sends a light beam onto the material surface, receives the reflection and obtains every measurement information on the actual seam position and seam geometry. This procedure can be used for materials made of high-alloy steel and aluminum as well as for unalloyed steel and galvanized steel. The laser distance sensor can be combined with the arc sensor without any problems.

Short detection distance, low cycle times

In order to achieve very short detection distances, the sensor is located in the hand flange of the robot. The torch position for the tracking movement is nearly identical to the later welding position and compared to conventional sensors, which require additional robot movement, considerably lower cycle times can be achieved.

Programming adaptation

During scanning the laser sensor detects the position of the seam start and end as well as the position of tubes and bolts; it measures gap widths, detects workpiece edges and recognizes seam geometries. Following this measuring process, the data which was sent to the robot controller is compared with the programmed values. Deviations are corrected in the program and the robot starts the welding process which has been adapted to the actual workpiece situation.

Advantages … for more productivity

  • Short search intervals due to optimum sensor position
  • Insensitive due to non contact measuring procedure
  • Memory function – data storage for cover layer welding
  • Programming and analysis possible using the QIROX® robot controller teach pendant
  • High workpiece accessibility due to compact design