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Reliable Positioning of Welding Seams in Welding Systems

Fully automated welding places great demands on quality and precision. Consequently, the correct position of the respective joints must be reliably detected before the welding process is started in the robot cell. Welding systems are equipped with innovative weCat3D 2D/3D profile sensors for the purpose of weld seam tracking.

Outstanding Performance and Efficiency: The MLZL weCat3D Sensor for Welding Systems

Fillet weld | V seam | HV seam | Y seam | HY seam | Sealing bead 

The compact weCat3D profile sensor with specially developed slimline housing design is mounted directly on the welding torch. The welding system moves along the entire contour of the object during the process. The measured data of the sensor recorded in this way is continuously sent to the controller via the created program in the wenglor uniVision software, which runs on the BB1C509 analysis module. This happens at the same time as the welding process – the weld seam inspection then follows.

  • ​​​​Stable evaluation during the welding process
  • Approved interfaces of renowned robot manufacturers for uniVision software
  • Reliable complete system consisting of sensor technology, analysis module and software
  • High temperatures possible thanks to robust aluminum housing, exchangeable protective screens and integrated cooling

Suitable for All Types of Joints

2D/3D profile sensors can be used for various types of joints.
The configurable uniVision software offers modules and templates specially developed for weld seam tracking, which enables detection of the laser guide point thanks to a special algorithm for all joint types and thus guides the welding unit precisely. 

Butt joints

Weld seam tracking: Butt joints

Lap joints

Weld seam tracking: Lap joints

Parallel joints

Weld seam tracking: Parallel joints


Weld seam tracking: T-joints

Double-tee joints

Weld seam tracking: Double-tee joints

Corner joints

Weld seam tracking: Corner joints

Multiple joints

Weld seam tracking: Multiple joints

Angular joints

Weld seam tracking: Angular joints

Versatile for Welding Processes

Automated industrial welding
With the following types of welding, for example:
  • MIG – Metal Inert Gas
    Metal welding with inert, i.e. inactive gases
  • MAG – Metal Active Gas
    Metal welding with active gases
  • ​​​​​​WIG – Wolfram Inert Gas
    Metal welding with a non-melting pure or alloy tungsten electrode
  • Laser welding (EN ISO 4063: Process 52)
    Laser welding permits high welding speeds with highly precise results 

Highly Flexible Thanks to Interfaces

wenglor offers appropriate interfaces in order to ensure that the innovative weCat3D 2D/3D profile sensors can be quickly and easily integrated into robot controllers.

Plugins for Robot Interfaces

Fanuc logo YASKAWA logo KUKA logo ABB logo
Robot welding interface

Robot welding interface

Robot welding interface

DNNP012 (SeamTech 4.0)
DNNP009 (SeamTech 2)
Robot welding interface

Robot welding interface

Fanuc logo
Robot welding interface

Robot welding interface

KUKA logo
Robot welding interface

DNNP012 (SeamTech 4.0)
DNNP009 (SeamTech 2)
ABB logo
Robot welding interface

Robot welding interface


More Application Diversity for Industry

Numerous industries are profiting from the innovative combination of robot welding cells with wenglor sensors and analysis modules.

Automotive industry

Weld seam tracking in the automotive industry


Weld seam tracking in shipbuilding and shipyard systems

Steel industry

Weld seam tracking in the steel industry

Rail industry

Weld seam tracking in the railway industry

Test Kit for Weld Seam Tracking

Try it for free for 30 days!

Product Comparison