Carl Zeiss Optotechnik GmbH - Optische Messtechnik
IDEAL Automotive Oelsnitz GmbH has optimized processes at its Slovakian production site with ZEISS T-SCAN

SYSTEM / APPLICATION
ZEISS T-SCAN 

FIELD
Automotive system supplier 

CUSTOMER
IDEAL Automotive Oelsnitz GmbH 


TASK 
A vehicle's technical features are not the only thing customers consider when buying a car. They increasingly focus on comfort and design – particularly on the interior. IDEAL Automotive Oelsnitz GmbH produces textile lining components for a vehicle's interior, exterior, and trunk. As system supplier for brand-name manufacturers like Audi, BMW and Mercedes-Benz, the company offers comprehensive industry expertise and knows how to meet its customers' demanding requirements. In addition to the look, functionality, and durability of its products, cost efficiency plays a key role. Hence, the need for optimized processes. The German company saw particularly strong optimization potential for the quality-assurance measurements of parts manufactured at its sites abroad.

As the individual locations did not have their own measuring equipment, all test fixtures had to be transported to headquarters in Germany where the company has its own measuring lab, equipped with a contact measuring system. Here the company checked, if the parts met the OEMs' requirements. It was a complicated logistical feat: the test fixtures – known as 'cubing models' – can weigh up to a ton, are quite large, and had to be shipped by truck to Oelsnitz in Eastern Germany and back again. This process meant that, for several days, the fixtures could not be used in production to align the parts. This caused significant costs. To solve this problem, the automotive supplier began a pilot project for optical and mobile measurements – with ZEISS T-SCAN – at its site in the Slovakian city of Bratislava, approximately 600 km away from Oelsnitz.

SOLUTION AND PRODUCT
Now everything works a lot more smoothly: "The mobile scanner has made us significantly more flexible. My colleague and I take turns traveling to Bratislava every two weeks to measure the parts – because the measuring system remains stationied in Germany," explains Jochen Rödel, a measuring technician at IDEAL Automotive Oelsnitz. "We travel there, set up the system, measure, dismantle our equipment, and then head back." The employees at the Slovakian production site requested the ZEISS system. They first researched the different options on the market and identified ZEISS T-SCAN to be the best scanner for their needs. The modular system is user-friendly and suitable for many different applications. The hand-held laser scanner makes intuitive and highly precise 3D scanning quick and easy.

"ZEISS T-SCAN does everything we had hoped for," confirms Rödel who has been using the scanner for more than a year. The three elements are perfectly aligned: the hand scanner, the tracking camera, and the touch probe. The major benefits of the system are its speed and the precise results. 210,000 points are captured every second – more than with any other method. The acquired data provide a detailed look at the actual condition of the component. This can also be compared with the nominal values stipulated in the CAD model. Thus, errors can be identified quickly and easily thanks to a false color comparison of the component surface.

Particularly when scanning large parts such as the cubing model, operators benefit from the excellent ergonomics of ZEISS T-SCAN allowing fatigue-free measurements. The light, compact scanner housing also makes capturing difficult-to-reach areas a breeze.

RESULT / BENEFITS FOR THE CUSTOMER
Even with tolerances of up to two millimeters for textile products, IDEAL Automotive Oelsnitz not only wants to ensure precision, but also be customer-oriented. The company is only responsible for developing the components. "We are involved until the start of batch production, and we use measuring technology every step of the way," explains Rödel. The geometry, cut, and placement of the components have to be inspected meticulously and must meet manufacturer’s requirements. This is where the ZEISS software scores. Problems that occur in production can be solved through component testing. "Learning by doing," is how Jochen Rödel sums up the process. He also counts on the expert service his company receives from ZEISS: "We get immediate support if we have problems or difficulties."

When performing measurements at the Slovakian factory, Jochen Rödel not only gets to know new approaches and different ways of thinking about his work, but also often discovers optimization potential. "The measurements are ideally suited for improving products so that they meet customer requirements. This process speeds up development." His colleagues are keen to implement these recommendations, and they are all impressed by the ZEISS system. "Whenever we arrive with the scanner, people are curious, but slightly hesitant at first. However, everyone is convinced by the time the results are in." Thus, it is planned for additional production sites in the Czech Republic and Poland, that have just opened and are gradually being equipped for production, to benefit from ZEISS T-SCAN as soon as possible.

ADVANTAGES / STATEMENT
- Maximum portability means high flexibility
- Less logistics expenses for factories abroad
- Precise measurements and optimization impress even sceptical employees

"With ZEISS T-SCAN we are mobile. Our customers benefit from a faster development process based on the measuring results."
Jochen Rödel, Measuring Technician, IDEAL Automotive Oelsnitz GmbH



Published in Optical Measurement
Tuesday, 21 August 2018 14:17

A Quick Fix

The company SLR Elsterheide has significantly sped up their measurement process with the ZEISS T-SCAN

SYSTEM / APPLIKATION
ZEISS T-SCAN CS 

BRANCH
Casting house 

CLIENT
SLR-Elsterheide GmbH, Elsterheide, Germany 


TASK 
Well-known companies such as Caterpillar Inc., the world's largest manufacturer of construction machinery headquartered in Peoria, USA, put their trust in the quality of the vehicle parts cast in the town of Elsterheide, Germany. SLR-Elsterheide GmbH is part of the SLR Group, which produced around 120,000 tons of nodular cast iron machine parts in 2016. The carbon in this particular type of cast iron has a nodular shape. Companies are very interested in nodular cast iron parts for industrial applications because of their outstanding mechanical properties and the relatively low cost of manufacture. As a system supplier for drive systems and components, the SLR Group's customers not only include companies from the construction machinery industry. It is active internationally, supplying its axle parts, gear housings and engine mounts to companies in the commercial vehicle, agricultural machinery, rail technology and mechanical engineering industries.

"Whether it's an excavator or a tractor, the vehicle almost always has a cast part from SLR," says the Head of the SLR Group, whose annual revenue totals 140 million euros.

Today the family-run company has around 700 employees. Its roots go back to the early 1980s: the SLR Group's main factory was first built in St. Leon-Rot, a small city in southwest Germany, in 1981. Located near Dresden, SLR-Elsterheide GmbH produces nodular cast iron parts and has an automatic molding facility. It joined the SLR Group in 2009. Many of the 280 employees working at this site fill orders for quality-conscious customers from Europe, the US, China and Japan. That the SLR Group continues to thrive in a country like Germany where wages are relatively high is primarily the result of their sharp focus on quality. This is evident in the company's reject rate of just 0.5 percent, which is remarkably low for this sector. The quality assurance employees in Elsterheide were looking for a digital solution to further increase the quality of their products as well as the number of nodular cast iron and gray cast iron parts that could be inspected. They wanted a system to replace a coordinate measuring machine that had become a bottleneck in the quality assurance process.

SOLUTION AND PRODUCT
Multiple suppliers presented their solutions before the company made its decision. As Bernd Macijewski, Measuring Lab Manager in Elsterheide, explains, the decision proved an easy one: "The T-SCAN CS from ZEISS best meets our requirements when it comes to precision, ease-of-use and portability."

The hand-held ZEISS T-SCAN CS laser scanner enables the metrology engineer to perform quick, intuitive and highly precise 3D scans. The hand-held scanner, tracking camera and touch probe are perfectly matched, ensuring the modular system can be used for a wide variety of applications. The exceptional scanning speed and the precise measurement results are particularly impressive. The surface of the component is probed using non-contact measurements: the laser line generated in the hand-held scanner completes the job in next to no time. 210,000 points are captured every second, more than with any other conventional method. Since the tracking camera detects the position of the scanner, 3D surface data can be calculated via triangulation. Contact measurements for additional individual points can be performed using the touch probe, enabling the metrology engineer to capture characteristics such as extremely deep boreholes or difficult-to-access recesses.

The data acquired with the ZEISS T-SCAN CS give the operator a detailed look at the actual condition of the scanned workpieces. Since this can be compared with the nominal parameters stored in the CAD model, serious deviations are identified quickly. Even those employees less familiar with metrology technology notice when a characteristic exceeds tolerance thanks to the comprehensive, user-friendly false-color comparison on the screen.

The ZEISS T-SCAN CS also meets even the most demanding ergonomic requirements, making scanning even larger components a breeze. Thanks to the light, compact scanning housing, it is also easy to capture data in difficult-to-reach areas with the ZEISS system. The intuitive, straight-forward operation further expands the range of applications and user groups.

RESULT / BENEFITS FOR THE CUSTOMER
All it took was two days to introduce the system and instruct employees on site, and three days to conduct the software training course for evaluating digitized, 3D data captured with optical measurements. Then the company was able to start using the device for quality assurance and inspection. "Any remaining issues were cleared up quickly as we used the system in our day-to-day work," says Bernd Macijewski, describing the roll-out phase for the innovative ZEISS T-SCAN CS in Elsterheide. Since 2014, two of the site's employees have been using the ZEISS solution to ensure the quality of cast parts manufactured in serial production. "Now we are monitoring a lot more components," says the Quality Manager, immediately highlighting another benefit: "When inspecting new component samples, we are now three to five times faster than with the coordinate measuring machine." This increase in efficiency has also had a positive effect on the reaction times for special measuring jobs, and thus all the workflows in the measuring lab. Not only that: inspecting more components in the measuring lab in Elsterheide has meant no additional costs for third-party measurements. "It used to be the case that, during particularly busy periods, we had to commission third-party measuring labs because we simply could not handle the measurements ourselves," says Macijewski.

ADVANTAGES / STATEMENT
- More workpieces inspected
- First sample inspection is now three to five times faster
- System rolled out quickly

"Introducing the ZEISS T-SCAN CS has definitely paid off. Thanks to this digitization system, we perform our quality assurance and initial sample inspections more quickly, more precisely and more cost-effectively."
Bernd Macijewski, Measuring Lab Manager, SLR-Elsterheide GmbH
Published in Optical Measurement
The new, advanced 3D sensor ZEISS COMET Pro AE is the second generation of the ZEISS COMET Automated and, as the heart of the robotic optical 3D measuring system the ZEISS AIBox flex, makes modular at-line measurements even faster and more precise. This increase in performance was made possible by countless technical improvements, and by combining different technical high-end solutions that have already proved their worth at ZEISS.

According to Head of ZEISS Optotechnik Markus Eßer, the new ZEISS COMET Pro AE fringe projector is “based on our high-end solutions and [offers twice the] available resolution, measuring speed and light intensity.” With a transfer rate of 4.6 megapixels per second, the shortest measuring time is 1.9 seconds. “Customers benefit not only from higher speed, the new fringe light projector also impresses on account of its high flexibility, robustness, quality and ease of use. 

Flange-mounted LEDs surround the sensor and camera for fringe projection. Much like a ring light, the additional illumination units are switched on one after the other, creating a distinct edge. This enables optimum capture of cutout and borehole contours. The machined housing gives the sensor the necessary stability, making it well-suited for various ambient conditions.

A 16-megapixel camera achieves an outstanding level of precision with a measuring volume of 550 x 370 x 400 mm. Thanks to its resolution of 4,698 x 3,264 pixels, even very small, subtle details can be identified, like scratches on the parts. Adaptive projection (ILC – intelligent light control) is just one aspect that ensures the previously announced halving of the measuring time, and it significantly reduces processing time. Complex components can be scanned with double the light intensity as compared to the previous model. The technology makes it possible to modify, even partially, the quantity of light projected onto a particular surface. This adjustment is made automatically, meaning the system independently configures the necessary parameters, making time-consuming correction and the modification of different elements a thing of the past.

The fusion of 3D data and edge illumination captures achieves greater structure resolution and data quality. That’s because combining the data from the camera and the projector with the illumination possibilities provided by the LEDs achieves the effective resolution of a 30-megapixel camera.

The automatically configured illumination time ensures easier operation. The system sets this live during the measurement. The measuring mode and surface are considered. The system also identifies unwanted external factors such as vibrations and changes to the ambient light, and it separates test objects from the background. The high degree of automation means employees can get to grips with the system more quickly. 

The integrated photogrammetry camera in the middle of the sensor already proved its worth in the previous model. It positions the individual photos within the space and in relation to each other. This means large parts can be scanned, which is why the sensor has been used until now to measure car body parts in the automotive industry. This technical addition makes the sensor interesting for other fields of application. “Since we have optimized the ZEISS COMET Pro AE for the complex requirements in automotive manufacture, it now features an optimum design for other industries and fields of application requiring a high degree of precision,” says Eßer.

Further information:
Brochure ZEISS COMET Pro AE


Published in Press
ZEISS is releasing two new, advanced measuring systems that will bridge the gap between the basic and premium segments and thus round off its portfolio of optical measuring machines. The 3D sensor ZEISS COMET 8M and the 3D scanning system made up of the ZEISS T-TRACK 20 tracking unit and the ZEISS T-SCAN 20 handheld laser scanner will both come on the market.

The new compact 3D sensor ZEISS COMET 8M is equipped with an 8-megapixel camera and is therefore the new, high-res version of the ZEISS COMET LƎD 2. Its high resolution and accuracy mean this fringe light projector will bridge the gap to the premium product, the ZEISS COMET Pro AE.

“We’re using this new resolution to tap into the application fields of turbine blades and consumer electronics,” explains Markus Eßer, Head of ZEISS Optotechnik. After all, to check whether these complex precision parts are in line with the prescribed tolerances, the data captured using the sensor has to be highly precise. In order to complete the different measuring tasks perfectly, users can opt for one of many lenses – and switching measuring fields is still so easy. The ZEISS COMET 8M offers a host of benefits besides: the 3D sensor is easy to transport, construct and calibrate. People are always impressed with the system’s ease of use.


Compact 3D sensor ZEISS COMET 8M
ZEISS COMET 8M


In order to offer one-stop solutions that meet all customer requirements, ZEISS has also developed a mid-range segment for its modular laser scanner systems.As the name suggests, the ZEISS T-TRACK 20 laser scanner tracking unit has a measuring volume of 20 m3: in this field it can detect the scanner and touch probe that belong to the system. In this way, it bridges the gap between the ZEISS T-TRACK CS+ with a measuring volume of 6 m3 and the ZEISS T-TRACK LV with 35 m3 – and it’s the same size, too. The ZEISS T-SCAN 20 handheld laser scanner is perfectly matched to the tracking system and thus ensures a no-hassle measuring process. 

“The new system was completely revamped – and we now rely exclusively on products from the ZEISS Group. After all, we have the skills for optics and cameras in-house,” says Eßer. The ZEISS T-SCAN 20 enables greater mobility – including for at-line measurements.

“The new systems deliver spotless data at the high speed users have come to expect. We’ve managed to triple the measuring volume and drastically reduce measurement uncertainty,” says Eßer. Accessories that have already been purchased, such as stands, are compatible with the new system.
Published in Press
Tuesday, 26 June 2018 16:54

Up to the Challenge

The pump manufacturer Allweiler in Radolfzell, Germany is using the ZEISS T-SCAN to reduce throughput times and costs. 

SYSTEM / APPLICATION
ZEISS T-SCAN 

INDUSTRY
Manufacturer of pumps and cast parts 

CUSTOMER
Allweiler GmbH, Radolfzell, Germany 


TASK 
Located just a stone's throw away from the Swiss border in Radolfzell, Germany, Allweiler GmbH is the country's oldest pump manufacturer and knows exactly what is most important these days: meeting customers' requirements down to the very last detail. The company has been producing pumps since 1860. Most of these must work flawlessly under extreme conditions, which is why materials and designs at this mid-sized company have to fulfill such demanding quality requirements. The pumps produced by Allweiler are not only designed to operate efficiently, but also to have a long service life. Achieving these goals requires outstanding manufacturing precision, so a comprehensive quality assurance system is in place to inspect each part. The key component is the nominal-actual comparison, i.e. the comparison of the manufactured part with the data set from the initial sample or its CAD data. It makes no difference whether the part is supplied by the customer or manufactured in-house. "The dimensions have to be 100% correct," explains Christian Bühring from the Process Planning department for Molding / Sales / Simulation / 3D Scan at Allweiler.

For a long time, an external service provider handled the measurements of cast parts. Yet it became increasingly apparent that outsourcing measurements was slowing down Allweiler's processes and, as a calculation of the company's costs revealed, making them significantly more expensive. "It was clear that, in the long run, it would be cheaper to do the measurements ourselves – even if we had to acquire the necessary equipment."

SOLUTION AND PRODUCT
The ZEISS T-SCAN stood out from the very beginning: the pump manufacturer's hand-held laser scanner will have paid for itself within just two years. Christian Bühring creates the measurement reports for Allweiler's customers and appreciates how user-friendly the ZEISS T-SCAN is. The ergonomic design means scanning is simple and intuitive. "Using this device is really easy. You have three measurement points, and these make scanning so straightforward." This also kept the time needed to introduce the scanning system at Allweiler to an absolute minimum. Within just a few weeks, Quality Assurance employees were using the ZEISS T-SCAN to perform reliable measurements without any problem.

The system comprises three components: a tracking camera, a hand-held scanner and a touch probe. Thanks to its modular design, the ZEISS T-SCAN can be set up in line with the customer's needs. This makes the system suitable for various applications, including measuring difficult-to-reach areas. The lightweight, ergonomic scanner housing is ideally suited for the technology, making measurements a breeze. The exceptional scanning speed and the precise measurement results are particularly impressive: the surface of the component is probed using non-contact measurements and at lightning speed with the laser line generated in the hand-held scanner. 210,000 points are captured every second, more than with any other standard method. Since the tracking camera detects the position of the scanner, 3D surface data can be calculated via triangulation. Contact measurements for individual points can be performed using the touch probe, enabling the metrology engineer to capture hole boundaries or difficult-to-reach areas such as recesses.

RESULT / BENEFIT FOR THE CUSTOMER
Sometimes customers require pump parts with extremely intricate designs. Christian Bühring remembers a plate with twelve individual models on top of it. All of these needed to be scanned. The most important factor was the suspension points. These were affixed to components to lift up and secure them, and needed to be balanced accordingly. Allweiler uses a wet casting process where the model is recreated using a molding material made up of sand and a bonding agent. The mold is hardened by pouring in molten metal and can shift in different directions. "When using the scanner to perform inspections, it became clear that each part had to be measured differently starting with the suspension point." This meant that there was a difference between the outer and inner shape. "Here we were able to use the scanner to great effect to accommodate these dimensions. Since then, we have not had any problems in this area." Another benefit is that the number of defects in the machining phase has been drastically reduced.

"We scan everything we cast – from a rotor or a lid all the way to the housing," says Bühring, citing some of the various components comprising a pump. "First and foremost, doing these measurements ourselves has saved us time." The company's external service provider had estimated they would need about two weeks to inspect each component. By doing on-site measurements, the throughput time at Allweiler is approximately just six hours. Allweiler passes on the time and costs it saves with the ZEISS T-SCAN directly to its customers. For Bühring, it is clear how customers benefit from these optimized processes: "They get the results more quickly and, what's more, test reports have become significantly less expensive."

In the future, not only will new parts be measured with the ZEISS T-SCAN, but the company will also start using the scanner for components it has been producing for years. "This is really exciting for us because we can identify wear in the casting molds early on by comparing the scan with the CAD model," says Bühring. This enables Allweiler's employees to manufacture components that correspond to the ideal first model with fewer interruptions.

BENEFITS / STATEMENT
- In-house measurements increase flexibility and lower costs
- Data sets are captured quickly for initial inspection
- Optimized production processes

"The ZEISS T-SCAN enables us to act a lot more quickly than before. Thanks to the precise measurements, defects in the cast parts are identified at such an early stage in the manufacturing process that the number of rejects has been reduced dramatically."
Christian Bühring, Process Planning department for Molding / Sales / Simulation / 3D Scan, Allweiler GmbH


Published in Optical Measurement
Friday, 05 January 2018 09:34

Deviations at a Glance

GERKON safeguards quality with the ZEISS COMET LƎD

SYSTEM / APPLICATION
ZEISS COMET LƎD 

INDUSTRY 
Service Provider in the area of coordinate measurement technology and 3D measurement technology 

CUSTOMER 
GERKON GmbH 

TASK
"There is no 'it can't be done'!" is the motto of Gerald Konrad, Managing Director of GERKON GmbH. This company, located in Mooskirchen, Austria, works on customer orders to digitize workpieces, cultural objects, and most recently even indoor spaces and plots of land. The Managing Director's approach to work has paid off. "Business is booming" says the 40-year-old, having generated turnover of more than 300,000 Euros in 2016. There is one additional aspect that is driving sales for this company, founded in 2011: "Companies are starting to recognize that it is worthwhile to allow for the digitizing of parts, instead of creating construction plans manually." This is assuming, of course, that the data quality is good. This is why Konrad, a trained machinist and machine electrician, searched in 2016 for a highly modern scanner with which he could also take orders from companies in the automobile industry. In other words, for clients "who distinguish themselves for operating in a quality-conscious manner." The investment made is "not a small sum for a three-person company" states Konrad, but it satisfies this businessman's requirement to "always strive for the best." Not an empty statement, as emphasized by this Managing Director from Austria, for whom it is also personally important to "keep abreast of the state of the art" and who thus invested approx. 10,000 Euros last year alone, for advanced training for himself and for both of his colleagues.

Within Austria, the company currently belongs to a small handful of companies that can conduct highly precise 3D measurements.

SOLUTION AND PRODUCT
The 3D sensor ZEISS COMET LƎD from Carl Zeiss Optotechnik GmbH, formerly Steinbichler Optotechnik GmbH, is impressive with a resolution of 3296 x 2472, achieved through excellent data quality and highly accurate measurement results. Thus, the device presents itself as the ideal solution for demanding applications in Quality Control and for reverse engineering. The sensor works with an innovative, maintenance-free and economical LED illumination technology. The 3D data collection using the solution implemented by GERKON is fast; the measuring time totals a mere 1.7 seconds per sequence. In addition, the innovative sensor system is extremely compact and light. This fact, together with the high ease of use, ensure that the operator has a flexible functional range for the ZEISS COMET LƎD at his disposal. And thanks to the included ZEISS colin3D software, the measurement results can be compared very rapidly with the 3D data record of the CAD model. In the process, deviations between the specified target values and the yielded current values are comfortably presented as a faulty color comparison, which significantly reduces the margin for faulty interpretations by the user. In addition, the software allows for preparation of detailed protocols for documentation of the measurement results.

RESULT / BENEFITS FOR THE CUSTOMER
After one year of use of the ZEISS COMET LƎD, one thing is certain for Gerald Konrad: "Investment drives the business." Word has already spread that it is now possible to measure parts visually and thus very quickly, and yet with a high level of accuracy. This company, which gets almost all new clients on the basis of referrals, is reporting full order books. This is also because it has enabled the ZEISS system to continue offering reverse engineering. And one additional aspect makes a decidedly positive impact for the Managing Director: "Thanks to the portability of the ZEISS system, we can conduct measurements directly at the customer's location." An offering that has its finger firmly on the pulse of the companies it serves. In the meantime, GERKON employees are conducting measurements "at customer's sites much more frequently than at our own measuring site." To be able to specify for automobile suppliers, more concretely, the deviation tolerances that must be observed so that all parts fit properly during final assembly, the employees now scan e.g., supporting points, locating pins, and welding fixtures for the cars to be manufactured. The greatest advantage is that Konrad can accurately detect, with the fringe projection scanner, every deviation from the target value up to five one hundredths of a millimeter. Thanks to this level of precision, the Managing Director considers the area of application for this ZEISS system to be "almost limitless". From individual parts for vintage cars, to large artist sculptures, "everything has already been digitized" by GERKON.

The Service Provider, who also conducts tactile measurements, believes that the great interest that companies have in visual measurement technology is also compounded by the fact that rather inexperienced customer employees can now technically "interpret the measurement report much faster and better". This is because with the ZEISS system, the deviation between the actual value and the target value are presented visually as a false color comparison. "This is something that truly everyone can understand, the results can be easily interpreted", emphasizes the Managing Director.

GERKON has many advantages thanks to use of the scanner - requiring only a quick training of employees by ZEISS on safe operation of the system.

ADVANTAGES / STATEMENT
- ZEISS COMET LƎD drives business for this Measurement Services Provider thanks to its speed, its accuracy, and the portability of its system
- Visual representation of the deviations between the current value and the target value reduces the risk of misinterpretation by the client
- With the ZEISS system, the Service Provider expands its portfolio with the option of reverse engineering

"Since we started working with the ZEISS COMET LƎD, we scan a large spectrum of components, both quickly and in high resolution, for our clients."
Gerald Konrad, Managing Director and Owner of GERKON GmbH, an Austrian Measurements Service Provider.



Published in Optical Measurement
Thursday, 09 November 2017 10:23

For perfect gap and joints

BMW in Munich increases process reliability for front and rear end assembly with ZEISS T-SCAN. 

SYSTEM / APPLICATION 
ZEISS T-SCAN 

INDUSTRY
Automotive 

CUSTOMER 
BMW Group Plant Munich 


TASK 
1,000 vehicles are rolling off the assembly line at the BMW Group Plant Munich every day. Only models of the BMW 3 and BMW 4 series are produced in the Bavarian state capital. These include the models BMW 3 Touring, BMW 4 Coupé, and M4 Coupé which are only assembled here and then exported worldwide.The front-end decisively characterizes the silhouette of a vehicle. For this reason, perfect assembly and strict adherence to the joint plan are of great importance to BMW. For a long time gaps have been tested only with gap gauges. In this process deviations of tolerances are effectively visualized, however, it does not contribute to determining the cause of an error. In the past in order to track down this error, vehicles with a conspicuous joint and gap profile therefore had to be driven to the measuring room and measured there. So, the department searched for a digitizing system to optimize the assembly process. It should be used right after the final assembly, and should provide as precise results as did the system in the measurement room.

SOLUTION AND PRODUCT
The hand-held ZEISS T-SCAN laser scanner enables fast, intuitive, and highly precise 3D scanning. Hand scanner, tracking camera and the touch probe are perfectly matched. The modular system can thus be used for numerous applications. Hereby, the unique scanning speed and the precise measurement results are of great value. This is because the surface of the component is scanned contact-free and lightning-fast with the help of the laser line generated in the hand scanner. 210,000 points per second are recorded; more than with any other conventional method. As the tracking camera detects the position of the scanner, 3D surface data can be calculated with the help of triangulation. With the touch probe, it is also possible to take tactile measurements of additional single points, e.g. in order to capture hole edges or not observable depressions. The data captured with the ZEISS T-SCAN thus describes the actual state precisely. This can then be easily compared with the target specifications, as defined in the CAD model. Deviations can be quickly detected in a user-friendly way with a false color comparison of the entire surface.

BMW in Munich increases process reliability for front and rear end assembly with ZEISS T-SCAN

  BMW in Munich increases process reliability for front and rear end assembly with ZEISS T-SCAN

The ZEISS T-SCAN fulfills highest demands with regard to ergonomy. For this reason, larger components can thus be also scanned without fatigue.   The data captured with the ZEISS T-SCAN precisely describes the actual state. Deviations can be immediately detected with a false color comparions of the entire surface.


As the ZEISS T-SCAN also fulfills the highest ergonomic demands, fatigue-free scanning even of larger components is possible. Thanks to the light and compact scanner housing, the ZEISS system can also easily capture data in areas that are difficult to access. The intuitive and easy handling extend the range of applications or user groups.

RESULT / BENEFITS FOR THE CUSTOMER
Since March 2016 three assembly workers have been inspecting front and rear ends of an average of six completely finished vehicles per day. Hereby, joint and gap widths of the two-part and rounded off radiator grille, the so-called BMW kidney, the headlight, and the bumper are measured. The only briefly trained operators of the ZEISS T-SCAN capture 80 to 90 measurement points at the front end and 40 measurement points at the rear end of the various models. The measured actual values are then compared with the set values of the CAD model. Within two hours it can be determined whether the front and rear ends show any defects. In this way the quality engineers of assembly and body construction can counteract much faster. For the quality and process engineers, the ZEISS system is therefore an important prerequisite to more effectively control in-house processes as well as those of the suppliers. Thanks to the portability of the ZEISS T-SCAN system, the apparatus for the assembly of the front and rear end can be measured directly in the production hall.

ADVANTAGES / STATEMENT
- Fast error detection thanks to precise measurement results
- Easy handling allows operation by assembly workers
- Portability of the system supports error prevention by testing apparatus in the production hall
Published in Optical Measurement
New development of ZEISS Optotechnik convinced trade public at Control 2017. 

Neubeuern/Oberkochen, May 16, 2017: At Control 2017, Carl Zeiss Optotechnik GmbH presented for the first time a price-optimized 3D sensor that enables companies an easy entry point into pioneering optical 3D digitizing. The ZEISS COMET LƎD 2 Base is a product derivative of the 3D sensor ZEISS COMET LƎD 2, which is already established on the market. 

Only a few years ago the complete measurement of parts was extremely time-consuming. Today, however, thanks to optical 3D sensors, millions of points can be captured contactless and lightning-fast on the surface, and visualized in real time as 3D model. An advantage that, among other things, extremely accelerates quality inspection in the production process. In order to ease the entry of companies into this pioneering technology, ZEISS developed a price-optimized 3D sensor - the ZEISS COMET LƎD 2 Base.

The performance with which the 3D data of the components can be captured with the ZEISS COMET LƎD 2 Base is similar to that of the standard model, but the product derivative (including Calypso Manual) is around one third less expensive. However, as Andreas Fuchs, Product Manager of ZEISS Optotechnik, stresses, this price advantage “doesn’t come at the expense of data quality.” As with all sensors from ZEISS Optotechnik, the most modern technology and sophisticated software are also used for the ZEISS COMET LƎD 2 Base. With the software it is possible to do false color comparisons between nominal and actual data, and to easily create protocols for the documentation of measurement results.

The difference between the two models lies primarily in the limitation of the measurement volume to two, in contrast to five measurement fields that come with the standard model. No arbitrary selection, as Fuchs emphasizes, but the “result of an extensive analysis of the measurement tasks of our customers.” Around 75 percent of all companies, as the Product Manager estimates, are satisfied with the given option to choose between the measurement fields 100 and 250. 

Due to the excellent data quality and the highly precise measurement results, the basic model can be used broadly for various applications ranging from quality control, toolmaking and mold construction to rapid manufacturing and reverse engineering. Even though the measuring speed of the innovative complete solution is not quite as high as that of the standard model, Fuchs is certain that ZEISS “has struck a chord with customers with this product.” 

The customer feedback at Control bears him out: “The performance and the price convinced straight away.” The ZEISS COMET LƎD 2 Base will be available as of July 2017. ZEISS generally examines customer inquiries to ensure that the respective measurement task can be satisfactorily processed with the desired solution. This is a service that protects customers from making false investments and ensures that the “high potential of optical measuring technology can really be used,” according to Product Manager Fuchs. 

Additional information
Published in Press
Thursday, 03 August 2017 09:19

Fringe Projection for Fast Scans

New ZEISS 3D sensor speeds up digitalization of parts


Optical metrology is not new to the world, but it is a cutting-edge technology topic for most industries. The fringe projection technology, in particular, opens up various application possibilities. Carl Zeiss Optotechnik GmbH has launched a successor model of this sensor in the market, ZEISS COMET LƎD.

"Even if not all measurement tasks can be solved optically, they are suitable for an increasing number of industrial applications," says Dr. Marcus Steinbichler, Managing Director of ZEISS Optotechnik. The great advantage of all optical 3D measuring methods is their speed with which they capture many measuring points at a time – and is on a continuous technological evolution path. With the 3D sensor ZEISS COMET LƎD 2, ZEISS has now reduced the measuring time by 50 percent per sequence compared to the predecessor model. So, as much as 5 million measuring points can now be captured in one second. "With our new system, fringe projection has become even more interesting for companies", Dr. Steinbichler claims. The CEO's expectations do not seem to be over the top, as the forerunner model, ZEISS COMET LƎD, has already been an industry favorite for several years.

Blue light visualizes geometries
The new generation of the ZEISS COMET LƎD 2 fringe projection sensor uses advanced optical technology. It has a projector module which projects blue LED light as a striped pattern onto the measurement object. This pattern is specifically distorted by the geometry of the respective component and captured by a camera. A software links the individual camera pixel to a point on the part via triangulation calculations. The point cloud generated in this way is then converted to a triangle mesh in STL format, with which a 3D model can be generated. This model can then be used for target / actual comparisons to the 3D CAD model. Compared to laser scanners, fringe projection provides more precise results. For this reason, this method is particularly suitable for quality assurance, as the following applications prove.

Focus on quality – Total Quality Improvement
"Good quality is of crucial importance. There is always room for improvement!” Ernst Mahle, the company founder of MAHLE Group, made this statement more than 100 years ago, but it is still one of the company's most important business maxims. For this reason, MAHLE Behr GmbH & Co. KG, headquartered in Stuttgart, continually defines more effective standards for quality planning during product development and production start-up, and systematically monitors internal production processes. When MAHLE took over Behr company in 2013 - a German family-owned company that e.g. manufactures air-conditioning for cars – a decision was made: the stainless-steel rectangular tubes used for producing EGR coolers for cars and trucks should no longer be purchased from external suppliers, but produced in-house on a production line planned specifically for this purpose. This required random dimensional inspections to be carried out in series testing, combined with a new measuring system.

Focus on total surface
MAHLE Behr defined several requirements for a new measuring system. For instance, it should be able to do even two-dimensional (2D) evaluation of the wall thickness across the stamped area of the tube as well as of the pipe ends. In addition, an automated measuring process and a compact measuring system were required since the plant operators should carry out the measurements in a small measuring room directly on the production line. The measurement system should also be easy to duplicate so that it could be used for future production lines worldwide. The fringe projection sensor ZEISS COMET LƎD met all these requirements. As the entire surface can be analyzed and evaluated using false-color representation, the machine operator is able to make any necessary fine adjustments of the slider on the stamping press while still maintaining the required minimum wall thickness. Moreover, geometric dimensions can now be tested to enable error-free automated assembly.

Reduction in measurement time
Not just MAHLE Behr, but also HERU Werkzeugbau GmbH & Co. KG uses the fringe projection sensor for demanding applications in quality control. Founded in 1987, the company develops and manufactures complex sheet metal parts as well as numerous tools. Tactile measuring machines are used to measure the components in order to ensure high product quality, however, these machines were reaching their utilization limits. The requirement for fast, complex measurements in series production was gradually becoming the primary focus of quality assurance. "We have now become so accustomed to this convenient measuring system that we can no longer imagine quality assurance without it," emphasizes Markus Hesse, Managing Director of HERU Werkzeugbau GmbH & Co. KG, Lennestadt-Grevenbrück, "We should have taken this step much earlier." Due to the possibility to do target / actual comparisons quickly and with minimal effort as well as the easy handling and the fast analysis of new parts, the company decided to opt for a ZEISS COMET LƎD. It fulfills the desire to perform fast measurements – in less than two seconds per sequence, even complex parts are scanned.

Faster product development
The ZEISS COMET LƎD sensor not only proves its advantages in quality assurance, many companies also use the system for product development, such as the shoe manufacturer Lorenz Shoe Group AG from Austria. The development of a new shoe model starts with the creation of a master model that is used as the basis for the subsequent series production. In order to create new models more quickly, the company employing more than 1,000 employees was looking for a measurement system to digitize the shoe lasts and then develop the soles in 3D. With the COMET LƎD and the automated COMETrotary turn-table for positioning of components, the master model is now fast and easy to measure, and the master data can be created and saved in just a few steps. "By introducing the COMET LƎD sensor we have been able to reduce development lead times to a fraction of what they used to be" says Florian Kaidlsdorfer, developer at the Lorenz Shoe Group, "We can respond much faster to fashion trends and develop intermediate collections for our own international retail business."

3D data for unique glass objects
Cristalica GmbH, a glass factory in Döbern, Germany, is even one step further in product development than the Lorenz Shoe Group. It allows the end user to modify existing 3D models of their products and thus create unique designs. Before the introduction of the ZEISS COMET LƎD sensor, samples had to be manually measured and recorded in order to display them digitally. The portable ZEISS sensor makes 3D data acquisition much easier, faster and more accurate. In addition, the handling is very convenient for its users. The glass factory also uses the 3D data obtained by the ZEISS system for quality assurance and for preparation of series production.

Wide range of applications
Bernstein Innovation GmbH also appreciates the range of applications of the system. "The ZEISS COMET LƎD has paid off from the very first day," says Stefan Niedermair, CTIO of Bernstein Innovation GmbH. The Austrian company develops and produces consumer goods by means of 3D printing and was initially looking for a measuring system that precisely captures complex geometries and can measure a wide range of component sizes ranging from a few millimeters up to 55 cm edge length. With the acquisition of the ZEISS COMET LƎD, another field of application soon opened up: digitalization of components. Thus, the company can easily create 3D components which have not been digitized. This provides enormous potential for the 3D printing.

Universal use
Although ZEISS COMET LƎD can already be used for a wide range of applications, because of its performance parameters and its compactness, the new ZEISS COMET LƎD 2 which has been available since February 2016, will "continue to drive this development," claims Herbert Daxauer, Product Manager 3D Digitizing. A significant advantage for companies looking to scan complex and or large components is a short measurement time of only about one second. They can save up to one hour of measurement time during each project. As the sensor is even more compact than its predecessor, it is even more handy. This is an advantage when, for instance, interior or compact spaces are to be digitized, or when the sensor has to be transported to different sites. As with the predecessor, the modular design allows changing the measurement field easily and quickly. For this reason, companies can solve different measurement tasks with just one sensor. According to Mr. Daxauer, the developers of the ZEISS COMET LƎD 2 have not only limited themselves to improving the existing functions, but have also created new features. The new sensor detects changes in exposure and vibration. An innovation that, according to Mr. Daxauer, "reduces the uncertainty of measurement and thus inspires product developers and quality managers".

 

 

Published in Optical Measurement
Tuesday, 01 August 2017 13:13

3D sensor optimizes 3D printing

ZEISS COMET LƎD enables the research institute Wood K plus to carry out a nominal-actual comparison. 

SYSTEM / APPLICATION
ZEISS COMET LƎD 

FIELD
Research and development 

CUSTOMER
Kompetenzzentrum Holz GmbH (Wood K plus) 


TASK 
Kompetenzzentrum Holz GmbH or Wood K plus for short is a leading research institute for wood and related renewable raw materials in Europe, located in Linz, Austria. Around 115 employees in five research areas at four locations (Linz, Tulln, Lenzing, St. Veit) are currently researching how renewable raw materials can be finished and processed for innovative applications and used for high-tech applications.

The fact that the scientific output of the competence center is internationally recognized is documented by many, in some cases highly ranked publications. In 2015 alone, the team from Wood K plus published more than 100 articles in refereed scientific journals and conference papers, as well as in trade journals and books. In addition to this, the center counted more than 50 ongoing academic works in the same year.

An important focus of research of the scientists in the field of wood-polymer composite materials is the development and processing of composites of renewable raw materials and thermoplastics (WPC: Wood Polymer Composite and NFC: Natural Fiber Composite), including with the use of 3D FLM printing. This is a theme that is of great interest for many companies from the industry due to its enormous practical relevance. In the context of a new international pilot project (Interreg Austria-Bavaria 2014-2020; technology and research platform "Hybrid Materials", AB97), the Kompetenzzentrum Holz was able to expand its infrastructure in Linz with additive production with 3D FLM printing.

In order to be able to manufacture high quality work pieces with this still innovative process, the deviations of the 3D-printed parts from the nominal values of their CAD model must be definable. In 2016, Wood K plus therefore invested in a ZEISS COMET LƎD that for the first time enabled researchers to carry out analyses of this kind.

SOLUTION AND PRODUCT
The Austrian scientists decided in favor of the strip projection sensor of Carl Zeiss Optotechnik GmbH especially due to its precise measurement results, which are "indispensible" for making qualitative statements about the nominal-actual deviations of the ongoing project in the field of wood-polymer composite materials."
The ZEISS COMET LƎD is an innovative sensor for the recording of 3D data that is based on the measurement principle of strip projection and blue LED technology. Here a strip pattern is projected onto the respective measurement object using the blue LED light. This pattern is specifically distorted due to the geometry of the respective component, and is recorded by a camera.

The intuitively operated ZEISS collin3D software subsequently uses triangulation calculations to establish a relationship between the individual camera pixel and a point on the work piece. The point cloud created in this way is then transformed to the so-called triangular network in the STL format, with which a 3D model can be generated. This is then drawn upon using the inspection software INSPECTplus, also from ZEISS Optotechnik, for the nominal-actual comparison with the 3D CAD model.

RESULT / BENEFITS FOR THE CUSTOMER
Only a few hours were required to launch the ZEISS COMET LƎD for practical usage. Because, according to the employees, handling is "easy and intuitive“, all of those trained could subsequently work independently with the ZEISS COMET LƎD after a brief introduction by ZEISS. After several weeks of intensive usage, the employees of the Kompetenzzentrum Holz were then introduced to the fine points of the system. Thanks to this detailed ZEISS workshop, which took place over several days, "we can now exploit the complete potential of the system."

The Austrian research institute Wood K plus currently uses the ZEISS sensor especially for the analysis of the components created with 3D printing or for the detection of deviations from the nominal geometry defined in the CAD model. Thanks to the precise measurement results, the scientists in Linz are able to adapt the printing process as hoped in such a way that, depending upon the material, the nominal-actual deviation already lies within the strived for or prescribed tolerance range after 2-3 test runs.

In addition to this, the employees can also digitalize various injection molding parts with the ZEISS COMET LƎD. "This makes it possible to evaluate and correlate the process-related differences with regard to the shrinkage behavior of the respectively used materials in the injection mold in comparison with the 3D print more quickly than previously.”

ADVANTAGES / STATEMENT
- "The price-performance ratio of the ZEISS COMET LƎD is convincing: we received an extensive system with a high degree of flexibility and performance capability at a fair price."
- "We were looking for an exact digitalization system. The ZEISS COMET LƎD fulfils our requirements, which is why we consciously chose it."
- "We use the ZEISS COMET LƎD to analyze whether the components manufactured with 3D FLM printing deviate from the nominal geometry (CAD). With this information, we adapt the printing process in such a way that the prescribed tolerances are observed."
- "Thanks to the time savings achieved through the adjustment of the process parameters for the required tolerances with the assistance of the data, investing industrial companies can anticipate a quick return on investments on the foundation of our development results."
DI Josef Ecker, scientific employee and lecturer on wood-polymer composite materials, Kompetenzzentrum Holz GmbH


Published in Optical Measurement
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