LTSK500, robot-controlled scanning system for large components

One sensor, one robot...many testing stations

The robot-controlled LTSK500 scanning system is specialised in the precision 3D presence monitoring of the functional features of large components.

A calibration process refers the scanning coordinates from the LTSK500 scanning system to the flange coordinates of the robot.

The notable features of the LTSK500 scanning system are:

  • Insensitive to stray light and surface discolouration
  • High-precision 3D dimensional and presence check combined
  • Flexible and easily adaptable measurement chain design
  • Crash-proof
  • Can be operated as a stand-alone system
Depending on the size of the component, the LTSK500 scanning system can be mounted on a robot or stationary.

The steps used in the evaluation

The LTSK500 is a laser triangulation sensor: The LTSK500 scanning system is guided by a robot evenly over the area to be scanned.

At the same time, a line laser is used to scan the object being examined, whilst the camera sensor, which is directed onto the object being scanned at a defined angle to the line laser - the laser line reflected from the object records.

In this way, a 3D image of the scanned object will be produced line-by-line.

The profile data gained in this way are evaluated directly in the sensor, and saved in the form of bitmap files, if needed.

The evaluation results can be sent to a PLC using digital signals, saved on a connected up PC or sent to a database via Ethernet (TCP/IP).

The image series illustrates the path from the scan to the evaluation / interpretation of the data obtained (far left a conventional photo for comparison).

Presence check

Specifics on complex components

  • Punching out in random shapes
  • Bores
  • Sleeves, bushes, nuts, eyelets, hooks, threads, bolts, rivets
  • Tabs, lugs, ribs, bars
  • Weld seams, welding spots, solder connections
  • Even difficult to access specifics are determinable using a large scanning clearance
  • ...and much more

3D geometry checking

3D measurement definition

  • Distances
  • Diameters
  • Positions (x, y, z)
  • Angles / axles / orientations

Best-fit methods

  • Circles / ellipses
  • Levels / flats / edges
  • Standard deviation depending on measurement object in range between

Extended check

Process safeguarding sequences

  • Measurement of the component against additional reference bodies, in order to eliminate positional tolerances, e.g. of the robot
  • Regular measurement of control parts for checking the system
  • Regular measurement against special reference bodies for checking the position references of the measurement system
  • Measurements with local component reference for measurement definitions independent of the position

Optical weld seam quality control

After the path points have been taught in, the seam will be run over by the robot and, in the process, scanned by the LTSK500 scanning system. The image data saved are evaluated directly on the sensor.

Teaching in using teach-in aid

The scanning positions for the LTSK500 scanning system are configured using the optical "teach-in aid".

Using a traffic light (traffic light function) implemented graphically, the following are displayed on the teach monitor to the operator

  • the correct working distance
  • the correct angle in the scanning direction
  • the correct angle crossways to the scanning direction

for every single path point.

Production data & process data

Preparation, output & storage

  • Simple OK / NOK output
  • Measured value output in ASCII format
  • Exchange format, e.g. to Excel as CSV
  • Online backup for all scanning raw data
  • Backup using database connection
  • Graphically enhanced display
  • Generation of process data
  • Customer-specific analyses

Tools & features for this product


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Components used for calibration and checking the system

Technical data and dimensions

Working distance:155 mm
Optical system:CCD sensor, 480x640 pixels
Picture zone (width x height):30x40 mm
Frame rate:500 frames/sec.
Scanning speed:100 mm/sec. (typically)
Scanning density:0,2 mm at 100 mm/sec.
Dig. / IOs:4x dig. input and 4x dig. output
Interface:1x Ethernet interface
4x line lasers:635 nm wave length (red)
Laser protection class<= 2M (EN 60825-1)
Incident-light illuminator:red
Dimensions of sensor (height x width x depth):115mm x 156mm x 60mm
Dimensions with connection (height x width x depth):250mm x 156mm x 60mm
Weight:approx. 2500 gr.
Housing:Aluminum, anodized
Operating voltage:24 V=
Power consumption:410 mW

Wente/Thiedig GmbH

Gewerbepark Querumer Forst
Spechtweg 1
38108 Braunschweig

Tel:              +49 531 / 2 19 45 69 - 0
Fax:             +49 531 / 2 19 45 69 - 99