text.skipToContent text.skipToNavigation

Robust Profile Sensor
weCat3D MLZL 

The MLZL 2D/3D profile sensors from the weCat3D series are designed for fully automated weld seam tracking, where the highest demands are placed on quality and precision. The sensor reliably detects the position of the joint to be welded via laser triangulation.

Technical Data for Explorers

The MLZL design, specially designed for use in welding processes, is particularly compact in order to prevent the occurrence of interference contours on the welding torch. Even on difficult surfaces, the profile sensor optimized for weld seam tracking offers good profile quality without noise. The integrated cooling and air flushing enables use in hot and dirty industrial areas, while the adjustable cover protects the welding optics from the brightness and heat of the arc.

Discover more technical features of the MLZL tracker sensor in our interactive overview.

The Technical Highlights in Detail

weCat3D MLZL at a Glance

The Visual Field

2D/3D profile sensor MLSL 2D/3D Profile Sensors
MLZLxxx
2D/3D profile sensor MLSL Software  (optional)
VisionApp Demo 3D
uniVision for Linux
uniVision for Windows
2D/3D profile sensor MLSL Licenses  (optional)
DNNL016 ****
License upgrade control unit, weld seam tracking
License upgrade weCat3D, weld seam tracking
2D/3D profile sensor MLSL Control Unit  (optional)
uniVision Profile Seam Tracking
2D/3D profile sensor MLSL Robot Interfaces  (optional)
DNNP007 ****
Fanuc
DNNP008 ****
Yaskawa
DNNP009 ****
Kuka
DNNP010 ****
ABB
2D/3D profile sensor MLSL Switch  (optional)
2D/3D profile sensor MLSL Protective Screen Retainer  (optional)
2D/3D profile sensor MLSL Protective Screen Set  (optional)
Plastic protective screen for MLZL
Glass protective screen for MLZL
2D/3D profile sensor MLSL Connection Lines
M12, 12-pin to open end
ZDCL001 ** ***
straight
2 m
ZDCL002 ** ***
straight
5 m
ZDCL003 ** ***
straight
10 m
ZDCL004 ** ***
angled
2 m
ZDCL005 ** ***
angled
5 m
ZDCL006 ** ***
angled
10 m
ZDCL007 ** ***
straight
30 m
2D/3D profile sensor MLSL Connection Cable
M12, 12-pin to M12, 12-pin
straight
2 m
straight
5 m
straight
10 m
2D/3D profile sensor MLSL Connection Cable
M12, 8-pin to RJ45
straight
5 m
straight
2 m
straight
10 m
straight
5 m
angled
2 m
angled
5 m
angled
10 m
straight
30 m
straight
10 m
angled
10 m
ZC1V020 ** ***
straight
5 m
ZC1V021 ** ***
straight
10 m
2D/3D profile sensor MLSL Guard Plate  (optional)
2D/3D profile sensor MLSL Mounting System
** Drag chain suitable
*** Suitable for robots
**** Already included in delivery of BB1C009

Challenge with Weld Seam Tracking: Joint Types

With optical weld seam tracking, the position of the objects to be welded together must be reliably detected in order to ensure precise application of a high-quality weld seam. A distinction is made between different types of joints.

Butt joints

Weld seam tracking: Butt joints

Lap joints

Weld seam tracking: Lap joints

Parallel joints

Weld seam tracking: Parallel joints

T-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
The MLZL weCat3D profile sensor uses the weld tracking module of the uniVision software, which enables reliable detection of the guide point thanks to a special algorithm for all types of joint and thus guides the welding unit precisely. 
Watch the MLZL tracker sensor in action during robotic welding in the following video. The joint types T-joint, butt joint and lap joint are shown. 

Integration Options in the Welding Process

There are various options for integrating the MLZL 2D/3D profile sensor in weld seam tracking.
With its special housing shape, the robust sensor is particularly suitable for use in robotic welding, but can also be used in welding applications with third-party software.

Weld Seam Tracking with Control Unit and Robot

With sensor-guided weld seam tracking in robot cells, the MLZL weCat3D sensor detects the joint before the automated welding process and passes on the exact positioning to the robot, which then corrects its path and applies the weld seams precisely. 
The robot moves through three dimensions including rotations, which requires more complex calibration and robot path programming.

When solving high-frequency welding applications with the MLZL profile sensor, the control unit BB1C009 with uniVision software and matching robot plugins enables quick and easy integration and setup. The sensor and control unit as well as the robot control and robot communicate via the Ethernet TCP/IP industrial interface.

The compact and slim design of the MLZL sensor for weld seam tracking prevents the occurrence of an interfering contour on the welding torch and thus enables robot welding in gaps and corners.

uniVision Templates for Optical Weld Seam Tracking

uniVision software contains a special module for weld seam tracking, which ensures reliable and stable detection of all types of joints before the welding process. 
Templates tailored to the application of weld seam tracking offer pre-parameterized templates for the most common joint types for quick and easy setup of weld seam tracking in the software.

Plugins for Robot Interfaces

Fanuc logo YASKAWA logo KUKA logo ABB logo
FANUC interface plugin

DNNP007
Yaskawa interface plugin 

DNNP008
KUKA interface plugin

DNNP009
ABB interface plugin

DNNP010
Kawasaki interface plugin

COMING SOON!
Fanuc logo
FANUC interface plugin

DNNP007
YASKAWA logo
Yaskawa interface plugin 

DNNP008
KUKA logo
KUKA interface plugin

DNNP009
ABB logo
ABB interface plugin

DNNP010
Kawasaki interface plugin

COMING SOON!

Robot Weld Seam Tracking with MLZL

Weld Seam Tracking in Robot Cells by MLZL 2D/3D Profile Sensor

In fully automatic robot welding cells, it is necessary to determine the exact positioning of the joints on edges, angles or steps before the welding process. For this purpose, a 2D/3D profile sensor is mounted directly next to the welding torch on the robot. Thanks to a protective housing, the sensor is protected against welding spatter. The sensor measures the interface via laser triangulation. The results are processed via uniVision software and sent to the control unit. The welding robot thus moves along the contour and connects the objects with a welding seam in the same movement sequence.

Weld Seam Tracking with Third-Party Software

With sensor-guided weld seam tracking, the MLZL weCat3D profile sensor detects the joint before the welding process and transmits the exact positioning to the higher-level control system, which then corrects the path and ensures precise application of the weld seams.

The MLZL profile sensor for weld seam tracking is integrated into new or existing systems with third-party software via the industrial interfaces TCP/IP or GigE Vision. SDKs are offered free of charge for this purpose.
Product Comparison