The rugged laser measuring equipment of QuellTech GmbH offers implementation of high-speed, contact-free inspection procedures even in a fully automated run. Weld seams can be optically examined to 100% giving a visual record. This includes parametric defect highlighting for automatic pass/fail results with live and post-weld measurement for weld defect criteria, HiLo and re-entrant angle. Pipe end bevels can be inspected in full while simultaneously measuring the ovality, generating fit-up sequencing and external Hilo analysis to reduce time, wastage and improve the integrity of the welds. This information is combined with the internal weld scan as a complete package of data for each weld. The QuellTech laser sensor family Q4 or Q5 used for these tasks is generally mounted on an arm of a rotational axis, to scan along the complete 360° angle of the internal surface in a sequence of strips. The Q4 sensors can also be used to control the weld seam tracking itself for rapid setup and ease of use. Even during a project, the range and scope of the Q Series sensor demonstrate the advantages of a modular system to quickly adapt to project needs, where the smallest system has provided a fast analysis of pipes as small as 105mm. The low power, with standard communication protocols, enable battery-powered systems to transmit wireless data to other systems for review and cloud back up.

One of our integrators in Taiwan by using our QuellTech laser scanners carried out a robotic seam tracking project.

One of our integrators in Taiwan by using our QuellTech laser scanners extracted trajectory and follow it during the welding operation.

One of our integrators in Taiwan by using our QuellTech laser scanners carried out a robotic welding seam project.

One of our integrators in Taiwan by using our QuellTech laser scanners carried out a robotic welding project.

The client is one of the oldest tire manufacturers in the world. He is preparing a quality improvement for some of his production lines and establishes a fully automatic process. One of the corresponding tasks refers to the preproduction phase, in which an inspection of the depth of the tread grooves, the height of the adjacent peaks and their lateral distance to certain reference lines of the rubber layers take place. The quality of the products until now was dependent on manual inspections of workers.


Newly produced rubber layers are not easy to inspect by laser scanners since the black surface is highly light-absorbing, so requires lots of light power. For this reason, a laser scanner with a powerful light source is imperative.


A high-resolution QuellTech 2D/3D Q5-240 Laser Scanner proved to be adequate for this project. It is placed over a continuously running conveyer belt. The efficient QuellTech measurement software is integrated as well. It is used for the detection of coordinates of the base of the tread grooves and the peaks. After completion of each 2D profile measurement, coordinates are calculated, and results are sent to PLC.

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

The Robot is following the path obtained with our laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

Downsampling is beneficial when you wonder how the data will appear when you use lower resolution scanner or when you would like to apply computationally demanding operations.

Application Report:
Measuring Height and Width of Glowing Steel Castings

Initial Situation
We received an order from one of the biggest steel manufacturers in the world, which offers material for civil construction, automotive, industrial, agriculture applications and various other sectors. The customer intends to achieve an automatic 100% measurement of height and width of glowing elements produced in his continuous casting line, with an accuracy level in the range of mm. Until now, this dangerous task was carried out by employees wearing protective clothing with manual measurement tools like caliper.
Particular Challenge
The laser scanners have to be operated in an extremely hot environment and are subjected to considerable thermal radiation arising from the cast parts. Therefore, they have to be cooled down by a water-based cooling system and covered with insulating material.
QuellTech Solution
This task is a typical application of the high-resolution QuellTech 2D/3D Q5-880 Blue Laser Scanners. Two of these units are placed at the left and at the right of the measuring objects, at a defined inclination angle. Blue laser light in this case is a prerequisite, as the cast parts are red-hot, hence emitting in the red spectral range. Additionally, the client was in need of a software solution for the project, so a 3D point cloud processing application was implemented, performing inline and evaluating width, height and angle results.
Result for the Client
With this QuellTech solution, the customer is able to inspect continuously the product quality, simultaneously avoiding scrap. He uses the same system for more than 10 different types of castings. Errors caused by manual inspection are considerably reduced, and safety for personnel is enhanced.

This videos teaches how to make simple scans with Q5 laser scanner using encoders.

The Robot is following the path obtained with a laser scanner. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

Weld beads in circular shapes are investigated by drawing linear cross-sectional lines on 2D data.

The project is described in detail. The difference between the highest and lowest points are measured after necessary post-process operations.

Flatness means Ebenheit in German. The difference between max and min points is calculated. Several different types of objects handled differently. PLC communication is established.

Three scanners are used to scan the top and side surfaces of the ingot. The flatness of the three surfaces is measured. This tutorial explains the project in detail. The calibration part is also very critical. It is one time only.

Measurement is actualized with Q4 QuellTech laser scanners. Several measurements are done to check the quality of the sculped ingot. The top surface and side surfaces are investigated.

The client would like to find the peak or pit position of the object. The program is developed in C++ with Qt. QuellTech Q5 scanner is used for this project.

Weld bead scanning and finding depth and width of the weld bead.

Robotized welding machines are getting more and more used by customers worldwide. The growing demand for increased Productivity, consistent quality is growing which makes Robot welding mandatory in many applications. However, in robot welding, there is a weld path programmed into the robot before welding, which then is used on all parts which have to be welded. Due to the tolerances of the parts, this path may vary from part to part. Another effect comes from thermal expansion of the weld material during welding, which leads to warping of the materials and therefore a new position of the weld seam.

QuellTech Q6 is used for this experiment. The number of the tubes and diameters of each tube is calculated using a 3D computer vision toolbox.

A transparent object is harder to scan since they have different optical properties. But this was a very successful scan with this very special scanner.

Transparent glue bead's height is measured. And to verify that the scanner is robust enough against transparent surfaces, a comparison on a surface with paper and without is paper made. It has observed that paper which is 100 micrometers is measured correctly. Therefore it has proven that transparent surface does not affect measurements in a negative way.

Air bubbles on a special chemical liquid wanted to be inspected by the client and client needed QuellTech laser scanners.

This sample program automatically detects any anomalies like spatter (bumps) or holes. It gives a warning when one of these issues are encountered. It simulates weld bead inspection. QuellTech Q4-20 Laser Scanner is used for this measurement.

This sample program automatically detects number of pins and then checks for pin alignment. It gives a warning when encountered with an anomaly. QuellTech Q4-5 Laser Scanner is used for this measurement.

This sample program automatically detects number of BGAs and warns you if you are expecting different number of BGAs. It also checks for the height and warns you if any BGA is out of tolerance level. QuellTech Q4-5 Laser Scanner is used for this measurement. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

This automatic inspection program detects holes and depth of holes in the weld bead region. Q4-5 QuellTech Laser Scanner is used for scan and to obtain point cloud.

QuellTech Laser Scanner is used to 3D model and inspects the water tap for reverse engineering. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners can be successfully used in seam tracking applications for the welding process with the help of a robot arm. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners can 3D model and inspect the shoe sole and create glue path for the robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners can 3D model and inspect the object, and guide the polishing robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners can 3D model and inspect the object, and guide the polishing robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners 3D modeling and inspection of the high heeled shoes and creating glue path for the robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners investigates CNC Machines under the dirty cutting fluid. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners 3D modeling and inspection of the water tap and guiding robot for polishing. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners 3D modeling and inspection of the water tap and guiding robot for polishing. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners are used for 3D modeling and inspection of the shoe sole and creating glue path for the robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners 3D modeling and inspection of the shoe sole and creating glue path for the robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners seam tracking application for the welding process with the help of a robot. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp

QuellTech Laser Scanners are used for seam tracking application for the welding process with the help of robot arm. Courtesy of our system partner Quadrep Electronics Taiwan Ltd. http://www.quadrep.com.tw/en/default.asp