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Practical tips

Tips and tricks for the efficient application of Werth Messrology

The articles deal with questions from daily practice and offer interested parties condensed knowledge for solving their measuring tasks. With the help of examples, the metrology technician receives suggestions for target-oriented and time-saving operation with optimum measurement results.

Practical tips
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Automatic and application-specific – Burr detection on injection-moulded workpieces

<p>In addition to determining geometrical characteristics such as size and shape and position tolerances, burr inspection is one of the most important tasks in the quality assurance of plastic workpieces. Computed tomography in combination with intelligent software enables fast testing with high reliability.</p>
File size: 1.73 MB
Output: QZ 2021/02
Automatic and application-specific – Burr detection on injection-moulded workpieces

Optimal measurement with multi-sensor systems – Selection of sensors on multi-sensor coordinate measuring machines

<p>To quickly solve complex measurement tasks, multi-sensor coordinate measuring machines and intelligent software procedures can be used to semi-automatically create different measurement sequences. The machines allow combined measurements with different sensors and replace several single-purpose machines due to their flexibility. Due to their modular design, they can be brought up to the state of the art at any time.</p>
File size: 2.71 MB
Output: QZ 2019/09
Optimal measurement with multi-sensor systems – Selection of sensors on multi-sensor coordinate measuring machines

Measuring as accurately as with stylus or optics – Computed tomography in coordinate metrology

<p>For precise measurements with X-ray computed tomography (CT), autocorrection based on a reference measurement with another sensor was initially necessary. In recent years, the measurement uncertainty has been significantly reduced by improving the device components and the software. Today, the measurement accuracy even of compact coordinate measuring machines with CT is similar to that of machines with conventional sensors.</p>
File size: 2.39 MB
Output: QZ 2019/07
Measuring as accurately as with stylus or optics – Computed tomography in coordinate metrology

Shedding light on – image processing and focus variation on different surfaces

<p>With multi-sensor coordinate measuring machines with image processing and focus variation sensors, the contrast of the images of the workpiece surface is decisive for the measurement results. These can be optimised with various functions so that even less "cooperative" workpieces can be measured.</p>
File size: 3.66 MB
Output: QZ 2018/06
Shedding light on – image processing and focus variation on different surfaces

The solution for every measuring task – Economic measurement with multi-sensor coordinate measuring machines

<p>The quality assurance tasks in companies are becoming increasingly diverse due to the broader range of products and geometrical characteristics to be determined. With efficient, automatic measurements, multi-sensor coordinate measuring machines offer the flexibility needed for this. A single machine can be used for many different measuring tasks and, thanks to its modular design, can always be brought up to the latest state of the art.</p>
File size: 1.7 MB
Output: QZ 2018/03
The solution for every measuring task – Economic measurement with multi-sensor coordinate measuring machines

The whole is more than the sum of its parts – How to choose the right X-ray tomography measuring machine

<p>For the solution of measuring tasks by using coordinate measuring machines with X-ray tomography, the available resolution, the necessary measuring time and the measuring range are decisive in addition to high accuracy. A modular design of the machines allows the selection of X-Ray tube, detector and basic machine as well as the machine software. In this way, the machines can be individually adapted to the respective requirements.</p>
File size: 1.67 MB
Output: QZ 2018/02
The whole is more than the sum of its parts – How to choose the right X-ray tomography measuring machine

Without changing the machine – Complete measurement with multi-sensor coordinate measuring machines

<p>In multi-sensor coordinate measuring machines, sensors are used that are based on different physical principles. If several surface areas with different properties have to be measured on the same workpiece, several sensors are often necessary. With multi-sensor coordinate measuring machines, such measurements can be carried out without changing devices and all features can be linked in the same datum system.</p>
File size: 1.75 MB
Output: QZ 2017/12
Without changing the machine – Complete measurement with multi-sensor coordinate measuring machines

Standard-compliant measurement with minimum scrap – Exploiting the possibilities of the new ISO standard for profile deviations

<p>With ISO 1101 (2017), the drawing entries for tolerancing profile deviations have been greatly expanded. In order to exploit these possibilities, the measuring software must offer simple solutions for a wide variety of measurement tasks. If the measurement is not only standard-compliant but also functionally correct, the scrap is additionally reduced.</p>
File size: 1.69 MB
Output: QZ 2017/10
Standard-compliant measurement with minimum scrap – Exploiting the possibilities of the new ISO standard for profile deviations

Safe measurement results in any environment – Avoiding measurement deviations through temperature compensation

<p>Deviations from the reference temperature can cause large measurement errors. Capturing the temperature enables the thermal effects to be compensated for by calculation on the coordinate measuring machine. This results in a significantly more cost-effective alternative to a highly accurate air-conditioned laboratory.</p>
File size: 1.65 MB
Output: QZ 2017/07
Safe measurement results in any environment – Avoiding measurement deviations through temperature compensation

On the test bench – Coordinate measuring machines: from qualification to measurement process capability

<p>Discussions about the accuracy of a coordinate measuring machine often already fail when defining the different terms. At the manufacturer's premises, the machines are calibrated and the defined specifications are checked as part of the acceptance process. To determine the measurement process capability, the measurement uncertainty for the respective measurement task must be estimated.</p>
File size: 1.78 MB
Output: QZ 2017/02
On the test bench – Coordinate measuring machines: from qualification to measurement process capability

Tactile and optical measurement – Which sensor is suitable for which workpiece

<p>Coordinate measuring machines with vision sensors are particularly suitable for the rapid measurement of workpieces such as profiles or 3D plastic parts. Conventional touch probes are mostly used to determine geometry and 3D position deviations on larger cubic workpieces. With multi-sensor coordinate measuring machines, many workpieces can be measured completely and in a single set-up.</p>
File size: 1.63 MB
Output: QZ 2016/12
Tactile and optical measurement – Which sensor is suitable for which workpiece

Flexible multi-sensor systems – Measuring with multiple sensors without restrictions

<p>With multi-sensor systems in coordinate metrology, all sizes can be determined with just one machine and usually without re-clamping. Novel concepts such as the use of multi-sensor systems or independent sensor axes offer even more flexibility and open up further areas of application. In addition, the economic efficiency of the coordinate measuring machine is increased.</p>
File size: 1.6 MB
Output: QZ 2016/10
Flexible multi-sensor systems – Measuring with multiple sensors without restrictions

The sharp view into the workpiece – Structure and spatial resolution in X-ray tomography

<p>When choosing a coordinate measuring machine with computed tomography sensors, the resolution required for the measuring task must be taken into account. The interaction of detector, X-ray source and position of the workpiece is decisive. If the device components are coordinated, micro-features can also be measured on thick-walled workpieces made of dense materials.</p>
File size: 1.97 MB
Output: QZ 2016/08
The sharp view into the workpiece – Structure and spatial resolution in X-ray tomography

Efficiently creating measurement sequences – Multisensor coordinate measuring machines with CAD data

<p>Programming coordinate measuring machines can be very time-consuming, especially for complex workpieces. If programming is done with the help of a 3D CAD model, this process can be accelerated significantly. This can be done "online" directly on the measuring machine or "offline" with a workstation remote from the machine, so the measuring machine remains available for measuring workpieces.</p>
File size: 1.61 MB
Output: QZ 2016/06
Efficiently creating measurement sequences – Multisensor coordinate measuring machines with CAD data

Precision on a glass thread – How micro-geometries can be captured

<p>Size does not always matter in coordinate metrology, quite the opposite: the industrial future lies in miniaturisation. Intelligent micro-probe concepts are therefore increasingly in demand. With these, even complicated measuring tasks can be mastered.</p>
File size: 1.65 MB
Output: QZ 2016/02
Precision on a glass thread – How micro-geometries can be captured

Avoid projection errors – Measurement of workpieces in two or three dimensions

<p>The inspection drawings of workpieces contain predominantly two-dimensional dimensional definitions, which often leads to the conclusion that the measurement task can be solved with 2D coordinate metrology. However, this requires exact mechanical alignment of the mostly three-dimensional workpieces. Otherwise, considerable measurement errors are hardly avoidable. Alternatively, 3D coordinate metrology can be used.</p>
File size: 1.53 MB
Output: QZ 2015/12
Avoid projection errors – Measurement of workpieces in two or three dimensions

Beyond the limits – How to extend the use of X-ray tomography

<p>In coordinate metrology with X-ray tomography, a choice often has to be made between sufficient resolution and sufficient measuring range. Both depend essentially on the components of the coordinate measuring machine with X-ray sensor technology used. Methods for increasing resolution extend the application possibilities of X-ray tomography measuring machines beyond the limits of the machine components.</p>
File size: 1.57 MB
Output: QZ 2015/10
Beyond the limits – How to extend the use of X-ray tomography

Scanning with and without predefined path – Complete geometry capture with multi-sensor systems

<p>With scanning, workpieces with many points can be captured reliably and Size, Mold and Position can be measured in a functionally correct way. Contour tracking is realised by a control algorithm in the interaction of the sensor with the coordinate measuring machine. By using information on the nominal contour, scanning can be accelerated considerably.</p>
File size: 1.58 MB
Output: QZ 2015/08
Scanning with and without predefined path – Complete geometry capture with multi-sensor systems

Functional inspection with virtual gage – How to reduce scrap with a contour comparison

<p>The observation of individual measured values and simple shape and position tolerances without material conditions can lead to the rejection of functional workpieces. Evaluation according to the maximum material principle as well as contour comparison with tolerance zone-dependent fitting offer possibilities for functional testing. This reduces scrap and makes Production more economical.</p>
File size: 1.56 MB
Output: QZ 2015/06
Functional inspection with virtual gage – How to reduce scrap with a contour comparison

Flexible zoom optics – image processing sensor for every application

<p>An image processing sensor with zoom optics enables different magnifications and thus expands the application possibilities of the coordinate measuring machine. However, changing the magnification also affects the other parameters of the zoom lens. This must be taken into account when using such a lens.</p>
File size: 2.13 MB
Output: QZ 2015/02
Flexible zoom optics – image processing sensor for every application

The application determines the sensors – multi-sensor systems or computed tomography?

<p>The choice of the right metrology for dimensional measurement tasks is very important. Basically, the application determines the sensors. The following describes which aspects the user should consider when making a decision.</p>
File size: 1.66 MB
Output: QZ 2014/12
The application determines the sensors – multi-sensor systems or computed tomography?

Distance sensors in comparison – Measurement of workpiece surfaces with optical sensors

<p>There are many contact and non-contact sensors for measuring workpiece surfaces. The appropriate sensor is selected depending on the measuring task and the surface present. The greatest flexibility is achieved with different sensors in one machine.</p>
File size: 1.56 MB
Output: QZ 2014/08
Distance sensors in comparison – Measurement of workpiece surfaces with optical sensors

Reducing costs with precise coordinate metrology – Measurement uncertainty in the area of tension between customers and suppliers

<p>For incoming inspection and production monitoring of complex workpieces, flexible multi-sensor coordinate measuring technology with a choice of faster or more accurate sensors and machines is increasingly being used. As a result, the evaluation of measurement uncertainty is becoming increasingly important. The interaction of tolerances and measurement uncertainties should be taken into account by customers and suppliers when shaping their cooperation..</p>
File size: 1.83 MB
Output: QZ 2014/04
Reducing costs with precise coordinate metrology – Measurement uncertainty in the area of tension between customers and suppliers

Influencing parameters, capture and optimisation – measurement accuracy in coordinate metrology

<p>A coordinate measuring machine is often used to measure workpieces that have close manufacturing tolerances. Here, "accuracy" is of central importance. Various categories are summarised under this term.</p>
File size: 2.07 MB
Output: QZ 2014/02
Influencing parameters, capture and optimisation – measurement accuracy in coordinate metrology

Measurement "in the image" and "on the image" – What coordinate measuring machines with image processing can do

<p>Different machine concepts can be used for coordinate measuring with image processing. But which machine is suitable for which measurement? This depends on the measurement task, the measurement uncertainty and the measuring speed.</p>
File size: 1.61 MB
Output: QZ 2013/12
Measurement "in the image" and "on the image" – What coordinate measuring machines with image processing can do
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