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Laser Processing Head RLSK  

Three Dimensions at the Speed of Light

As a pioneer of the third dimension, the laser processing head RLSK sets new efficiency standards for laser welding. The RLSK combines the advantages of the remote laser welding principle: a large working distance and the capability to position the beam in a 3D work space. In its entire 3D work space, the RLSK allows beam positioning within milliseconds and it guarantees a uniform beam diameter. This 3D capability permits the remote laser processing head to accurately position the beam along high speed robot motions enabling short cycle times and a very high utilization of the laser and the robot.

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Article in Industrial Laser Solutions for Manufacturing Jan/Feb 2017 » Case study from Tennessee Rand » Reference AWL »


The Optics of 3D Precision

The RLSK uses scanner technology to position the laser light on the work piece. Two high speed scanner mirrors and a linear axis (which holds the collimation module) accurately position and move the laser focus in a 3D work space of 200 x 300 x 200 mm3 within milliseconds. The unique optical design of the lens systems for collimation and focusing of the laser beam guarantees a constant focus diameter for reliable process results in the entire work space. The integrated linear axis moves the focus position in the Z dimension and positions two additional laser pointer beams to the laser focus position. This enables offline and pre-programing of the welding process with pinpoint accuracy. The laser welding process can be observed and analysed online by coupling the imaging system of a CCD camera to the linear axis of the RLSK.

Laser Processing Head RLSK Structure

Laser Processing Head RLSK Technical Data

Optical System

Focusing system (magnification @ focal length) 3.0 @ 450 mm*
Collimation system (magnification @ focal length) 1.0 @ 150 mm*
Max. average laser power 8 kW
Max. beam parameter acceptance (half angle) of laser light exiting fiber 97% power content within 115 mrad
Wave length 1020 - 1080 nm*
Transmission > 94%
Core diameter laser light cable 50 – 300 μm (recommended)
Laser light cable receiver HIGHYAG LLK-Auto(LLK-D), HIGHYAG LLK-HP(LLK-B), QBH*
Max. deflection angle of beam to optical axis 12 °

Work Space
X,Y 200 x 300 mm² (@ Z = 0)
Z ± 100 mm
Working distance to cover slide 510 mm (@ Z = 0)
Positioning time 10% field diagonal (X,Y) < 8 msec
Positioning time 100% field diagonal (X,Y) < 25 msec
Positioning time 10% field stroke (Z) < 15 msec
Positioning time 100% field stroke (Z) < 30 msec
Max. processing speed 1 m/sec
Max. re-positioning speed 5 m/sec
Positioning accuracy ± 0.2 mm (X,Y), ± 0.5 mm (Z)

Process Monitoring
Magnification 1:5 (1 mm field distance is equivalent to 0.2 mm on the camera chip),*
Interface CCTV viewing C-Mount
Optional camera system USB, Ethernet, *

WxDxH Approx. 382 x 451 x 493 mm³ (depending on configuration)
Weight Approx. 35 kg (depending on configuration)

Electrical AC 230 V, 50 Hz, 1,5 kVA* DC 24 V, max. 3 A
Pneumatics ≤ 1.0 MPa Cross jet: ≤ 1.0 MPa, approx. 2000 l/min @ 0.6 MPa
Cooling Flow rate 3 l/min, temperature 15 – 35 °C (avoiding condensation)
PLC / field bus system Hard wired, Profibus, Profinet, DeviceNet, Ethernet/IP, Interbus, CAN bus
Signal output rate 1ms

Subject to change without prior notice
*Others on request

Easy process set-up with the RLSK Studio

The RLSK Studio software enables the user to leverage the capability of remote laser processing as well as setting up the entire process in an user friendly way. The precise positioning of the laser focus and the process features can easily be visualized using the RLSK Studio. The graphical user interface of the RLSK Studio assists in synchronizing the focus movement of the RLSK with the motion sequence of a handling device such as a robot.

  • Main Features of RLSK Studio:
  • Downloading and uploading of work pieces or component geometry
  • Editing process sequences
  • Editing process features such as seam shapes, welding speed, laser power, laser power ramping, defocussing etc.
  • Visualizing and optimizing the laser-on time
  • Editing synchronization points and the optimizing motion sequences


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