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The DeMeet 3D CNC coordinate measuring machines provide automatic, user-independent quality control with measuring results traceable to the international length standard. The DeMeet measuring machines are available in Video (optical) and Combo model (multi-sensor for combined video and touch probe measurements).
The DeMeet multi-sensor measuring machines are an excellent all-in-one alternative to other measuring devices for example a measuring microscope, profile projector, and height gauge. With an excellent price-performance ratio the DeMeet measuring machines enable high precision quality control in measuring laboratories as well as on the production floor. Applications of optical and multi-sensor measuring are among others in the precision engineering, medical, plastics, and electronics industry.
Video and Combo measuring machines for general quality control with a market-matched measuring range. The DeMeet-220 is developed as a personal measuring machine with a desktop design. For the inspection of larger products or for batch measurements the DeMeet-400 series are all-round measuring machines, with the DeMeet-705 at the top of the range.
Optics
Optical measurements
Optical measurements are performed using the camera system, optics, and adjustable illumination. Due to the non-contact nature of the measurements, there is no risk of product deformation. Optical measuring is very suitable for products with fine structures and contact-sensitive products.
Another advantage of optical measurements is that edge information can be defined directly with a high density of measuring points. Within the field of view of the DeMeet, very high accuracy can be achieved.
Optical system
A combination of high-quality telecentric optics and DeMeet Sony sensor camera is integrated for a clear image with excellent contrast and a high resolution. In combination with the image processing functionality of the DeMeet, this results in highly accurate measurements.
Telecentric optics are supplied as a standard to avoid perspective image distortion around the center of the field of view. The DeMeet is either equipped with Nikon, Leica-Design, or Mitutoyo optics with a large working distance for a brilliant image with high contrast providing optimal edge detection. The lenses with various magnifications from 1x to 10x are available and can be exchanged during a measuring run, generating a range in display magnification from 40x to 400x.
Combo preparation
With the option “prepared for Combo” a Video machine can be upgraded on a later date to a multi-sensor measuring machine for combined video (optical) and touch probe (contact) measurements. For upgrading of a Combo prepared machine on a later date a Combo upgrade pack can be ordered.
Illumination
Illumination is essential for accurate measurements. The DeMeet is standard equipped with LED-based illumination (backlight, coaxial light, and segmented ring light).
A ring light consisting of 3 rings, 16 segments, and 48 cells LED pattern, that can be controlled per individual ring, segment, and cell, is standard supplied for optimal light configuration. The ring light can be set in intensity and angle to achieve the best contrast with clearly defined edges.
The backlight is transmitted from below and is used to highlight the profile of the edges. Coaxial lighting can be used for illumination inside deeply located structures. The LED-based backlight and coaxial light can be adjusted in intensity.
The configuration of the illumination is automatically controlled during a CNC measuring run. A coaxial laser pointer assists navigation during the creation of a measuring program.
Multi-sensor technology
Multi-sensor measurements
The increasing miniaturization and complexity of product features result in more difficult measuring and inspection procedures. Measuring systems equipped for only optical or contact measurements are often no longer sufficient, in which case multi-sensor measuring machines are required for optimal geometrical quality control.
When measuring certain features encounters the physical limits of non-contact measurement, the DeMeet video machines can be additionally equipped with a touch probe system (contact measuring system).
Probe modules and styli
With the DeMeet Combo model both optical and contact measuring principles are seamlessly integrated and measurements can be performed by the optical and the probing system within one measuring run and even within one feature. Touch probe measurements can also be useful to create a complex 3D product alignment.
Standard a Renishaw TP20 system with a 5-way stylus configuration is supplied. On request various probe modules, systems, and stylus configurations are available. Multiple probe modules can be used to leave the stylus configuration on the module to achieve a shorter set-up time for measurements requiring other stylus configurations.
In addition to the standard touch probe system, an optional stylus change rack (automatic probe configuration change) can be utilized. With the stylus change, rack probe modules can automatically be exchanged within one measuring run.
Approve for DeMeet Multi-sensor measuring software
Approve for DeMeet is a true multi-sensor software package, where the difference in sensor origin of the measuring input is limited to only the necessary.
All the measuring results of video and touch probe can be displayed, reported, exported and used in constructs together, and are dynamically updated. The measuring results can also be displayed together in a 3D view.
Approve for DeMeet is designed to be a user-friendly software package, but is flexible and very elaborate to measure many products.
3D Movements
The 3D motor controller in Approve for DeMeet makes blended, smooth moves which make the DeMeet run more fluent and faster. The DeMeet also moves during video image processing and other calculations, shortening the measuring time considerably. To eliminate hysteresis, and therefore improving accuracy, an approach direction and distance can be set for video measurements. Pre touch and average touch can be set for touch measurements.
Measurements
For video measurements, our proprietary image processing algorithms were developed, which are completely different from algorithms used by competing products. The edge finds algorithm finds complete curves instead of separate points, the interpolation of the pixels is virtually infinite and very accurate. Video targets larger than one field of view can be measured in one program step, and are automatically split into more images and combined for the fitted result. The illumination for video measurements can be set and changed using a graphical control for backlight, coaxial light, and ring light.
For touch measurements, it is normal that the targets are defined in 3D, but now this is also the case for video measurements. Features (like a circle) can be measured properly even if they are not parallel to the camera (optical) plane. The graphical touch probe configuration editor allows for building a custom configuration for a specific measurement by using an extensive touch probe library. Settings can be defined and shared between measuring steps which greatly reduces the complexity of a measuring program.
Measuring Program
A measuring program in Approve for DeMeet is a graphical program consisting of simple program steps. Program steps can be changed, added, copied, moved, and removed very easily, inputs of a program step can be easily changed or linked to other results by using drag-and-drop. A program can be verified by running it step by step, even a single program step can be run for verification. After running a program step an icon appears behind it to indicate its status.
Results, Report and Export
Results from measurements and calculations (constructs, fits, etc.) as well as from other program steps can be added to export or report and saved or printed as PDF or CSV file for further analysis. If tolerances are used for a result a graphical tolerance bar is shown. Results and reports can be automatically printed or exported at the end of a measuring program run.
PTB software evaluation
Evaluation software for coordinate measuring machines.
The accuracy of the evaluation software was verified by comparing the results obtained from the software with reference results supplied by the PTB (Physikalisch-Technische Bundesanstalt, Braunschweig, Germany).
The Approve for DeMeet software has been placed in the class of the smallest deviations.
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