Formtester de référence


La mesure haute précision des défauts de forme
MarForm est le logiciel d’analyse des défauts de forme haute précision développé par Mahr. Ces systèmes sont utilisés pour analyser les écarts de forme sur n’importe quelle pièce, dans tous les environnements de mesures. Les analyses de circularité, cylindricité, rectitude, parallélisme, défauts de forme, position, etc sont conformes à la norme ISO 1101.
La gamme Formtester propose un matériel adapté à chaque besoin. Grace à leur facilité d’utilisation, les Formtester vous font gagner du temps et de l’argent. En production, le mode automatique permet à l’utilisateur de faire d’autres tâches pendant le cycle de mesure et d’analyse. 

MarForm: des machines de mesures de circularité et cylindricité de haute précision.

MarFormMFK 600
MarForm MFK 600
Reference form measuring center for laboratory and measuring room, with a large measuring volume for heavy workpieces
The benchmark form measuring centers for laboratories and measuring rooms

MFK form measuring center for comprehensive workpiece assessment. MFK form tester ideal for testing engine blocks, cylinder heads, gear cases, hydraulic elements, crankshafts and camshafts. Generously sized, optimized design for high measuring accuracy throughout the machine. Long measuring and travel paths for easy, safe workpiece changing.

MarForm MFK 600 or MFK 500, built from individual coordinated components, offer flexibility and adaptability for a range of measuring tasks.

The form tester is based on a non-warping granite base, which is set up so that it is isolated from vibrations. Its high-precision horizontal surface forms the datum plane for the measuring setup. The workpiece holder table supports and guides heavy workpieces by means of air bearings on the granite surface.
-Universal form measuring station with a large measuring volume for heavy workpieces
– MFK 600 with 5 measuring and set-up axes for measuring form elements and determining positions
– MFK 500 with 3 measuring and 4 set-up axes for measuring form elements
– Rotating measuring probes and automatic workpiece positioning make it easy to use and quick to set up
– Air bearings for low maintenance and continuous loading
– Collision-protected probe systems for diverse measuring tasks
– Large workpiece holder surface for large individual workpieces or workpiece pallets
– Roundness measuring device with automatic adjustment to the workpiece diameter, even with eccentric positioning
– Straightness measurements in 3 main coordinate directions
– Workpiece assessment as per ISO 1101
– Testing in machine and workpiece coordinates in accordance with production specifications
– Full evaluation of form and position features as well as diameter and position values
– Extensive accessories and choice of measuring probes for optimized performance of all measuring tasks
– Ready for use and easily expandable with additional movement axes for turning workpieces during a program sequence. In this way the most complex measuring tasks, on V-engine blocks for example, can be carried out without operator intervention

Roundness measuring device
In addition to the measuring spindle (C-axis), the roundness measuring device also includes an axis for automatically adjusting the measuring probe to the workpiece diameter (X-axis). In roundness measurements the X-axis adjusts the measuring probe to the workpiece shape, even with eccentric deviations which are bigger than the measuring probe range.

Straightness measuring device
The vertical straightness measuring device (Z-axis) guides the roundness measuring device on a granite surface. On the MFK 600 the accuracies of the horizontal straightness measuring device (Tx- and Ty-axis) are independent of the size, form and weight of the workpiece because the guides are separated from the air bearings. The MFK 500 offers the Tx-/Ty-axes of the motorized centering and tilting table as motorized positioning axes. Set-up axes (Ta and Tb) are integrated into the workpiece holder table and can automatically align workpieces mechanically in the machine volume.

Measurement performance
Automatic set-up functions integrated into measuring sequences allow for continuous operation. Measuring value processing in parallel with measuring value recording shortens the measuring time. A full range of accessories is available for the form measuring station to extend the possible applications.

MarForm MFU 800
MarForm MFU 800 is a fully automatic, precision form measuring station available in a standard version for laboratories and measuring rooms.
The ultra-accurate form and position tolerance testing system for laboratories and measuring rooms

MFU form measuring instruments from Mahr have been setting standards in precision form measuring tasks for over 30 years.

For injection components, brake pistons or gage calibration #96 MarForm MFU is the test equipment of choice when it comes to the manufacture of precision fit components with tolerances of < 1 µm. MarForm MFU 800 is a fully automatic, precision form measuring station available in a standard version. With its large measuring volume and high table loading capacity up to 1000 N it is extremely versatile. - Four precision measuring axes: Roundness measuring axis (C), straightness measuring axis, vertical (Z = 500 mm), straightness measuring axis, horizontal (X = 200 mm), tangential measuring axis (Y = 6 mm) - Axes C, Z and X are mounted on air bearings - Axis C has a high-resolution encoder - Axes X, Z and Y are fitted with precision incremental scales - Fully automatic CNC workpiece alignment - High loading capacity for workpiece weight up to 1000 N - Workpiece assessment as per ISO 1101 - Evaluation and filtering in accordance with standards MarForm measuring machines are ideal for demanding measuring tasks requiring a high level of precision: In areas such as automotive construction, injection pump technology, ABS braking systems, aerospace technology and the complete measurement of car pistons. Along with the high basic precision of the axes, the secret to the exceptional reproducibility of the measuring results from MarForm machines is the extremely high positioning accuracy. For that reason, every MarForm MFU machine will become your benchmark machine in the accuracy pyramid. Guaranteed.

MarForm MFU 100
MarForm MFU 100 – Reference form measuring station in a new dimension

The journey from high precision measuring axes to competent measurements is often a long one but one which the MFU 100 has mastered completely. Only the MFU 100 has integrated reference elements for the real-time spatial compensation of geometric deviations, recording all profiles as high-precision 3D coordinates.

MarForm measuring machines have been recognized for decades for their accuracy and stability. The new MarForm MFU 100 was developed with the claim of testing the shape and position features of product parts in a 1-liter measuring volume close to the production area and at a reasonable cost. In so doing it has taken our long experience into a new dimension.

MarForm MFU 100 is a precision reference form measuring center which with its exceptionally low measurement uncertainty increases the tolerance margin for your production processes, thereby lowering production costs.

Key Features
– Circular roundness measuring axis (C)
– Motorized centering and tilting table (X, Y, A, B)
– Vertical straightness measuring axis (Z)
– Horizontal straightness measuring axis (X)
– Tangential multifunction axis (Y)
– Motorized length measuring probe T7W
– MarWin evaluation software for form and position features

All axes are coordinated to ensure maximum measuring reliability. The horizontal X-axis extends beyond the center of the workpiece, allowing “true parallelism” to be checked free from other measuring influences. The tangential Y-axis is an innovative new feature. This additional motorized axis, which is new to conventional form testers, helps to locate the zenith of miniature workpiece geometries without operator influence. The actual precision measurement can then be started in exactly the right place. This significantly increases process accuracy.

The Y-axis is used together with the vertical Z-axis and the horizontal X-axis to determine the workpiece diameter. This allows tolerances to be checked in the sub-nanometer range by the maximum material principle, in accordance with standards, for the very first time #96 and at a very reasonable price.

High-resolution digital scales in conjunction with the machine electronics provide a level of positioning accuracy which allows even miniature part geometries to be tested. MarForm MFU 100 is also suitable for error-free scanning of surfaces.

The MarWin software package offers the full range of functions of a modern measuring and evaluating application #96 including user-friendly records and electronic documentation in the company network.

The rigorous separation of control and evaluation functions ensures that MarForm MFU 100 is future-proof and expandable. New language versions are easy to incorporate, as are special evaluations and new standards. The MFU 100 is also ready for the addition of future sensor systems.

In short: MarForm MFU 100 brings form measuring machines for inspection rooms and production areas into a new dimension.

MarForm MFU 110 optionally also with optical sensor interchangeable with T7W (motorized)

MarForm MFU 110
Reference form measuring machine for the precision measuring room and production with tactile and optical probe.
– Use of the benefits of the most modern, optical metrology
– Non-tacticle measurement of sensitive parts
– Particularly high measuring accuracy
– Lowers your production costs
– For use directly in production
– Highest degree of automation

Key Features

The high-precision measuring machine MarForm MFU 110 is based on the proven MFU 100 and has been expanded with a highly flexible optical measuring system. A tactile and an optical probe are now available to you at the same time for high-precision measuring tasks in the measuring room or in production. All the advantages of traditional metrology and modern optical tactile metrology are combined in one machine. Here is an overview of some of the advantages of the optical metrology: No influence of the measuring force: Measuring object are not bent or deformed Non-contact measurements: No scratching and damage to sensitive surfaces Direct measurements: No influence of the probe head geometry, thus more accurate recording or contour, e.g. edges, convex forms Very small probe arm diameter: Measurement of very small objects and forms, e.g. small bores High rotational speed of the C-axis: Short measuring time, large amounts of data, measurement of large areas Large vertical and lateral resolution: Higher precision e.g. for diameters and distances 2 optical outputs: More flexible contacting, less probe arm movement, improved taper measurement Maximum measuring realibility Process accuracy Software package MarWin Future-proof As with the MFU 100, the MFU 110 has an active air-conditioned enclosure for use in production. Short paths and faster possibilities to influence the control of the production process lower your costs and optimize the quality of your products. The highest degree of automation is attained with the motorized centering and tilting table as the core component of a formtester as well as the use of the motorized T7W measuring probe. The MarForm MFU 110 can be expanded and thus is thus future-proof thanks to its strict separation of control and evaluation. Newer language versions can also be just as effectively realized as special evaluations and new standards can be.

MarForm MFU 200 Aspheric 3D
Mahr developed the MarForm MFU 200 Aspheric 3D to enable optical components to be tested in 2D / 3D quickly and close to the production area. MarForm measuring machines have been recognized for decades for their accuracy and stability.
With the MarForm MFU 200 Aspheric 3D this experience has now been made available to the optical industry.

The MarForm MFU 200 Aspheric 3D is a precision measuring instrument which with its very low measurement uncertainty is ideally suited to your process optimization requirements.

Measuring principle
The MarForm MFU 200 Aspheric 3D measures the topography of optical components. Of course, a quick 2D measurement can also be recorded with a profile across the zenith of the lens. For 3D measurements two linear profiles offset by 90° are first measured across the zenith of the lens in a single sequence. Then multiple concentric polar profiles are recorded by rotating the C-axis. These measuring points are used to generate a topography. With the fully positionable probe arm, interrupted surfaces can be measured.
Using the measuring station in a vibration-cushioned cabinet keeps external interference such as vibration and dirt away from the measuring objects.

Measuring procedure
Before starting the measurement, choose the nominal form type and set the parameters for the expected reference lens. In the next step the measuring data is recorded and compared with the nominal data for the lens.
The RMS value, PV value and slope error are shown as parameters.
In the software the individual parameters for the aspheres, such as the radius of curvature R0, conical constant k and the aspheric coefficients Ai, can be adjusted to the measuring results when adjusting the nominal asphere to the fit asphere.
The differential topography between the measured values and the nominal lens is displayed as a color-coded line chart.The 2D profiles and the differential topography can then be exported in known formats for correction for the machine tool.
In addition to measuring spheres and aspheres as described above, other rotationally symmetrical objects can also be measured and evaluated using the nominal form as a conical profile or Sagitta description of a 3D scatter plot.

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