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Background knowledge on the function and use of multi-sensor systems and computed tomography

Accumulated knowledge based on decades of experience with optics, stylus, computed tomography and multi-sensor systems supports users in the successful use of their coordinate measuring machines for flexible, safe and traceable 3D measurements according to international standards.

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Completely measure outside and inside – X-ray tomography in coordinate metrology

<p>FUNDAMENTALS PART 3 In coordinate metrology, mainly tactile and optical sensors and X-ray computed tomography are used. X-ray tomography machines differ in basis and components such as X-ray source, rotary axis and detector as well as in software and thus in their properties, the basic understanding of which is helpful for optimal use. Spatially extended objects including their internal structures can be completely captured by metrology.</p>
File size: 2.49 MB
Output: QZ 2020/02
Completely measure outside and inside – X-ray tomography in coordinate metrology

Flexible and surface-independent – Tactile sensors in coordinate metrology

<p>FUNDAMENTALS PART 2 Tactile and optical sensors as well as X-ray computed tomography are predominantly used in coordinate metrology. Tactile sensors differ in their functional principle and structure consisting of mechanics, optics, electronics and software and thus in their properties, the basic understanding of which is helpful for optimal use. The tactile measurement is largely independent of the surface properties of the objects to be measured.</p>
File size: 2.2 MB
Output: QZ 2019/12
Flexible and surface-independent – Tactile sensors in coordinate metrology

Non-contact and fast – Optical sensor technology in coordinate metrology

<p>BASICS Part 1 In coordinate metrology, mainly tactile and optical sensors and X-ray computed tomography are used. Optical sensors differ in their functional principle and structure consisting of mechanics, optics, electronics and software and thus in their properties, the basic understanding of which is helpful for optimal use. Sensitive workpieces and those with small features can also be measured without contact.</p>
File size: 3.01 MB
Output: QZ 2019/10
Non-contact and fast – Optical sensor technology in coordinate metrology

Measuring at the limit – Special measurement methods extend the application range of computed tomography

<p>The demands on the metrology vary depending on the measurement task. In the case of the computed tomography sensor, in addition to high accuracy or short measuring time, the measurability of objects that are difficult to penetrate or multi-material workpieces is also required. Different measuring methods are available for such applications.</p>
File size: 3.04 MB
Output: Kunststoffe 2019/10
Measuring at the limit – Special measurement methods extend the application range of computed tomography

The choice between multi-sensor systems and X-ray tomography – All around or right through

<p>Sensors for coordinate measuring machines have their strengths in various departments. The decisive factors for sensor selection are the necessary measuring uncertainty, the measuring speed and the workpiece properties. The selection of the optimal sensor is described using three exemplary measuring tasks.</p>
File size: 7.8 MB
Output: QE 2019/01
The choice between multi-sensor systems and X-ray tomography – All around or right through

Multisensor or X-ray tomography – The measuring task determines the choice of the coordinate measuring machine

<p>For efficient use of coordinate metrology in quality assurance, the measuring machine of the right accuracy class and size must be equipped with the appropriate sensor or multi-sensor systems. It often makes sense to combine non-contact with tactile sensors. However, the suitability of the sensor for solving the measuring tasks depends on various criteria.</p>
File size: 1.82 MB
Output: QZ 2018/04
Multisensor or X-ray tomography – The measuring task determines the choice of the coordinate measuring machine

The all-round talent – computed tomography as a driver for Industry 4.0

<p>Many companies still develop, manufacture and test their products in non-networked, individual steps. These processes can be simplified and accelerated by using coordinate measuring machines with computed tomography. The result is a complete, digital image of the workpiece.</p>
File size: 1.71 MB
Output: QZ 2017/05
The all-round talent – computed tomography as a driver for Industry 4.0

Measuring on the fly – Coordinate metrology with computed tomography on the advance

<p>Workpieces can be completely captured at high speed and accuracy using X-ray computed tomography. However, the method has often been too slow for measurements close to production. A new machine type now combines the benefits of different machine classes.</p>
File size: 5.34 MB
Output: QE 2017/03
Measuring on the fly – Coordinate metrology with computed tomography on the advance

Micro-tools and -topographies in all facets

<p>Micro-mills and special tools made of carbide or diamond are sometimes only a few tenths of a millimetre in size and have CUTTING EDGES of perfect sharpness with radii of a few micrometres. The measurement of such geometries is one of the greatest challenges for non-contact and tactile coordinate metrology.</p>
File size: 1.19 MB
Output: Mikroproduktion 2017/02
Micro-tools and -topographies in all facets

With high accuracy and speed – topography scanning with new chromatic focus line sensor

<p>Multi-dimensional distance sensors enable higher point densities or measuring speeds than point sensors. However, this often happens at the expense of a likewise increased measurement uncertainty. The new chromatic focus line sensor CFL meets both major challenges of metrology at the same time.</p>
File size: 4.23 MB
Output: QE 2017/01
With high accuracy and speed – topography scanning with new chromatic focus line sensor

The agony of choice – Different sensors in practical use

<p>Modern coordinate measuring technology offers the optimum sensor for practically every measuring task. Different measuring tasks on the same workpiece can usually be solved most efficiently with multi-sensor coordinate measuring machines.</p>
File size: 3.75 MB
Output: QE 2016/04
The agony of choice – Different sensors in practical use

Measuring micro-geometries with the fiber probe

<p>The advancing miniaturisation in industry is leading to ever higher demands on metrology. New MICROTASTER concepts such as the fiber probe enable precise measurement even for small, complex features and easily deformable workpieces.</p>
File size: 4.65 MB
Output: Mikroproduktion 2016/02
Measuring micro-geometries with the fiber probe

New applications – roughness measurement with computed tomography

<p>With the help of suitable hardware components and software procedures, ever smaller details of workpieces can be resolved on coordinate measuring machines with X-ray tomography sensors. This opens up a multitude of new application possibilities. Initial investigations on roughness standards show that current machines are also suitable in principle for roughness measurement technology.</p>
File size: 1.85 MB
Output: QZ 2016/01
New applications – roughness measurement with computed tomography

Multi-sensor systems for micro-features – metrology for fuel injectors

<p>For more than ten years, Continental AG has been using machines from Werth Messtechnik GmbH, Giessen, worldwide for the measurement of fuel injectors. The image processing sensor technology used in the beginning was soon supplemented by the patented Werth fiber probe and later by computed tomography. This enables the highly accurate measurement of Size, Mold and Roughness and guarantees the traceability of the measurement results.</p>
File size: 1.81 MB
Output: QZ 2015/09
Multi-sensor systems for micro-features – metrology for fuel injectors

Complete and non-destructive – Ten years of computed tomography in coordinate metrology

<p>The possibility of complete and non-destructive measurement of components with any structure has made computed tomography an indispensable tool in quality assurance. In the ten years since this technology was introduced into coordinate metrology, Werth has developed a wide range of machines and functions for the increasing range of measuring tasks.</p>
File size: 456.23 kB
Output: QE 2015/01
Complete and non-destructive – Ten years of computed tomography in coordinate metrology

Flexible and accurate measurement – artefact correction in computed tomography

<p>When measuring with computed tomography, various artefacts occur due to the principle. Various methods are available to correct the measurement errors caused by this. Depending on the respective measurement task, the most suitable method can be selected.</p>
File size: 1.94 MB
Output: QZ 2014/11
Flexible and accurate measurement – artefact correction in computed tomography

Measuring at the touch of a button – X-ray tomography sensor technology establishes itself in coordinate measuring machines

<p>A long-cherished wish of metrology engineers, "measuring at the touch of a button", is a reality. X-ray tomography machines provide a digital copy - voxel volume - of the tomographed workpiece within minutes. Hundreds of thousands of measurement points are generated automatically. They completely and precisely embody the workpiece geometry.</p>
File size: 1.32 MB
Output: Inspect 2013/11
Measuring at the touch of a button – X-ray tomography sensor technology establishes itself in coordinate measuring machines

Trust in technology must mature – X-ray tomography, the future of coordinate metrology?

<p>In recent years, X-ray tomography has found its way into the laboratories of many companies. Data recording on the workpiece suddenly seems quite simple and straightforward, and the long-cherished wish of metrology engineers to "measure without programming" is becoming a reality. But what exactly does a coordinate measuring machine with X-ray tomography sensor mean and what is the state of the art?</p>
File size: 1.74 MB
Output: QZ 2013/05
Trust in technology must mature – X-ray tomography, the future of coordinate metrology?

Why micro-tools have to be so precise

<p>In micro-milling, even the smallest deviations can disrupt the process and drive up costs. Extreme demands are therefore placed on the EMPHASISED and expensive tools. Quality monitoring is carried out with high-precision optical or optotactile measuring machines.</p>
File size: 5.99 MB
Output: Mikroproduktion 2011/02
Why micro-tools have to be so precise

Multipoint measurement in coordinate metrology – Modern sensors allow complete capture of the workpiece geometry

<p>Modern coordinate measuring machines can be equipped with various sensors. In addition to tactile sensors, optical sensors are becoming increasingly popular. Here, large numbers of measurement points can be obtained on the material surface in a short measuring time. This allows a complete evaluation of mold, size and position. The complete capture of workpieces with computed tomography offers even more extensive possibilities.</p>
File size: 326.81 kB
Output: QE 2010/05
Multipoint measurement in coordinate metrology – Modern sensors allow complete capture of the workpiece geometry

Profiles in a row – Topography measurement with optical sensors

<p>Modern coordinate measuring machines can be equipped with various sensors. In addition to traditional, tactile sensors, optical sensors are becoming increasingly popular. Here, large numbers of measurement points can be obtained on the material surface in a short measuring time. This allows a complete evaluation of mold, Size and Position.</p>
File size: 1.72 MB
Output: Laser + Photonik 2010/04
Profiles in a row – Topography measurement with optical sensors

Confocal sensor enriches multi-sensor systems

<p>In addition to the existing range of sensors, Werth Messtechnik has now for the first time created the possibility of performing highly accurate measurements on a coordinate measuring machine using a non-contact confocal sensor. Even two-dimensional micro-structures can thus be captured three-dimensionally.</p>
File size: 1.02 MB
Output: Mikroproduktion 2009/03
Confocal sensor enriches multi-sensor systems

Measuring with low temperature influence – Do temperature-stable CMMs make you forget the temperature?

<p>Coordinate measuring machines used in production are often "temperature-stable". Their permissible length measurement error is specified for a wide temperature range. With increasing deviation from the reference temperature (20&nbsp;°C), special attention must be paid to the thermal expansion of the measuring objects. If this is not taken into account, glaring measurement errors will occur. This guide allows an estimation of the temperature-related measurement uncertainty.</p>
File size: 706.38 kB
Output: QZ 2008/01
Measuring with low temperature influence – Do temperature-stable CMMs make you forget the temperature?

Just measure the whole part

<p>COORDINATE MEASURING DEVICE WITH NOISE SENSOR It is not unusual for a first article inspection report to consist of several hundred test measurements. In the hot phase of prototyping, sometimes a week of measuring time is needed to perform the first-out-of-tool tests. It can be done faster and more efficiently with the help of X-ray technology.</p>
File size: 896.16 kB
Output: Plastverarbeiter 2006/07
Just measure the whole part

Reliable measurement results in all seasons – Multisensor coordinate measuring machines with temperature compensation

<p>Tactile and multi-sensor coordinate measuring machines are no longer used exclusively in test laboratories, but increasingly directly in Production. This means measurement at temperatures that can deviate greatly from the reference temperature 20&nbsp;°C. The measurement errors resulting from this temperature difference are often underestimated, remain unconsidered and thus falsify the measurement results.</p>
File size: 210.24 kB
Output: QE 2006/04
Reliable measurement results in all seasons – Multisensor coordinate measuring machines with temperature compensation

Measuring micro tools precisely – Tool measurement technology for practical use by Werth Messtechnik GmbH

<p>In the production of tools for micro machining, tolerances in the hundredths of a millimetre range are commonplace. With conventional metrology, chip spaces below 50 µm, chamfer widths of 10 µm and the clearance angle on this small chamfer cannot be measured. This is where special microsensors, such as fiber probes or the Focault laser from Werth, come into play.</p>
File size: 291.56 kB
Output: fertigung 2006/03
Measuring micro tools precisely – Tool measurement technology for practical use by Werth Messtechnik GmbH

Computed tomography expands multi-sensor

<p>The integration of computed tomography into multi-sensor coordinate metrology has resulted in systems with which both complex workpieces and micro parts can be measured quickly and accurately. Initial application experience shows that these systems can open up considerable rationalisation potential. The fast first article inspection also leads to considerable time savings in product development.</p>
File size: 1.38 MB
Output: Mikroproduktion 2006/02
Computed tomography expands multi-sensor

Measuring with multi-sensor coordinate measuring machines made easy

<p>Modern multi-sensor coordinate measuring machines have a wide range of applications with measuring tasks of varying complexity. The qualifications of the machine operators range from employees with little training, who only occasionally measure a few Sizes, to specialists who solve very difficult measuring tasks using all the available possibilities of this machine technology. This results in different ways of working, which are optimally supported by the structure of the software for device operation.</p>
File size: 156.34 kB
Output: QE 2006/02
Measuring with multi-sensor coordinate measuring machines made easy

Multi-sensor systems on coordinate measuring machines – Optical and tactile sensors measure together

<p>Flexible coordinate measuring machine is the order of the day. A variety of different sensors for different applications can ideally complement each other to solve measurement tasks. Generally, sensors are divided into non-contact (optical) and contact (tactile). When selecting the sensors, the properties of the measuring objects must be taken into account, such as their contact sensitivity, the size and accessibility of the features to be measured, the number of required measurement points as well as the tolerances of the features.</p>
File size: 2.55 MB
Output: QE 2005/11
Multi-sensor systems on coordinate measuring machines – Optical and tactile sensors measure together

Complete test plans in one run – Coordinate measuring machines with multi-sensor systems

<p>Coordinate measuring machines have found wide application in production monitoring and first article inspections. Machines with multi-sensor systems offer the benefit of flexible adaptation to any measurement problem. Modern systems process complete test plans in one measuring run.</p>
File size: 652.1 kB
Output: Plastverarbeiter 2005/06
Complete test plans in one run – Coordinate measuring machines with multi-sensor systems

"Werth"-Work on highly accurate measurement (Company portrait of Werth Messtechnik GmbH)

<p>"What you can't measure, you can't produce." This is one of the key sentences that has stuck with the writer of these lines from one of his metrology lectures. A sentence that is certainly still valid today, even if there are worlds between the metrology possibilities of that time and the measuring machines of today. Reason enough to find out about the latest state of the art at one of the most renowned metrology suppliers. A second reason for a trip to Werth Messtechnik GmbH according to Giessen is the realisation that especially in the environment of tool and mould making, keyword first article inspection, an economical process chain depends to a great extent on economical metrology. Highly accurate, yet flexible and economical – that need not be a contradiction.</p>
File size: 4.38 MB
Output: Special Tooling 2005/03
"Werth"-Work on highly accurate measurement (Company portrait of Werth Messtechnik GmbH)

"We grow through innovation?" (Interview with Dr.-Ralf Christoph, owner and managing director of Werth Messtechnik GmbH)

<p>Even many competitors attest to the technological leadership of Werth Messtechnik GmbH from Giessen in the market for multi-sensor coordinate measuring technology. There are several indications that the market-related top position in this segment could also be achieved in the foreseeable future: Turnover has increased by 600% in the last decade, the current order intake shows a plus of 30% and since Dr.-Ing. habil. Ralf Christoph has been at the helm of the company as owner and managing director, the export share has risen from 9% (1992) to currently 40%. In addition, there is a good deal of innovative drive, which was recently underlined with the premiere of the "TomoScope". Werth has made X-ray tomography, which is well known in the Department of Material Testing, fit for industrial metrology. We had the opportunity to talk to Dr Ralf Christoph.</p>
File size: 832.4 kB
Output: Special Tooling 2005/03
"We grow through innovation?" (Interview with Dr.-Ralf Christoph, owner and managing director of Werth Messtechnik GmbH)

Precision with glass fibre – Measurement of micro-structures and components

<p>Sensors and coordinate measuring machines for macroscopic components show deficits in the quality assurance of micro-parts and structures. Although the measurement problems can be partially overcome by the application-specific combination of a wide variety of sensors in multi-sensor coordinate measuring machines, micro-geometries at locations that are difficult to access optically can hardly be captured even with such measuring machines. A new type of fiber probe that combines optical and tactile measuring methods closes this gap.</p>
File size: 352.43 kB
Output: Mikroproduktion 2005/01
Precision with glass fibre – Measurement of micro-structures and components

Replacing manual bench gauges and gauges with multi-sensor coordinate metrology

<p>Many manufacturing processes are monitored with the help of gauges and manual bench gauges. These systems are capable of reliably solving complex measuring tasks, but with the disadvantage of high costs for production, maintenance and corresponding calibration.</p>
File size: 2.66 MB
Replacing manual bench gauges and gauges with multi-sensor coordinate metrology

Measuring micro tools with maxi-magnification

<p>Without highly accurate metrology, Production of precise micro tools is not possible. However, the small dimensions and sensitivity of the miniature tools require a special approach to measurement and interim check. Only non-contact methods can be used, and high magnification optics of 1000x and more are indispensable. Handling is usually done by robotic gripping systems without any manual intervention. The fixture system of the measuring device also has to be extraordinarily accurate for micro tools, because form errors cannot be completely compensated for.</p>
File size: 1.93 MB
Output: Werkstatt + Betrieb 2004/10
Measuring micro tools with maxi-magnification

Two measures? – Measurement uncertainty and production process

<p>The measurement uncertainty affects the release tolerance in quality assurance and the actually usable tolerance in the own production and at suppliers. There cannot be two different Sizes for the interpretation of the drawing tolerance. Two ways lead out of the situation.</p>
File size: 1.74 MB
Output: QZ 2003/06
Two measures? – Measurement uncertainty and production process

EDM systems in combination with coordinate measuring machines increase product quality

<p>The fast and highly accurate capture of workpiece contours allows effective working methods for both metrology and production engineering. It enables the fast copying of master parts, the fast and workpiece-specific quality control of the products and, via a corresponding online coupling, a direct improvement of the product quality. By creating the appropriate interfaces between the AGIE cutting EDM systems and the WERTH coordinate measuring machines, ideal conditions have been created here.</p>
File size: 284.56 kB
EDM systems in combination with coordinate measuring machines increase product quality

Coordinate measuring machines with multi-sensor systems – Flexibility for dimensional measurement in production monitoring and laboratories

<p>Flexibility combined with high accuracy has led to the widespread use of coordinate measuring machines for dimensional testing in both production monitoring and first article inspection in the laboratory. Coordinate measuring machines with multi-sensor systems have the special benefit that the user can orientate the choice of sensor to the respective measuring problem.</p>
File size: 0.94 MB
Coordinate measuring machines with multi-sensor systems – Flexibility for dimensional measurement in production monitoring and laboratories
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