Model DMR 6000 -Inline Thickness Measurement System

Fluctuations in panel thickness and deviations from nominal values reduce quality. Your customers will identify these as product defects .

The GreCon Thickness Gauge DMR 6000 provides accurate information to ensure a high quality standard by a quick adjustment of the production process. All measured data can be transferred to an automatic process control or press control system. This reduces time periods required for product changes or production start-ups and rejected product is minimised with the DMR 6000.

Features and Benefit

• Production control within precise tolerance limits
• Temperature-resistant frame
• Quick and timely recognition of quality deviations
• Display of effects of changes in the production (intentional or unintentional)
• Display of optimisation potentials
• Reduction of costs by minimising excess material required to be added for sanding (0.1 mm ~ 0.8 % material)
• Ensures high system availability
• Measuring System Analysis according to MSA, type-1 study
• Quick press adjustment to new products

Your Benefit

• Quick and timely recognition of quality deviations
• Production control within precise tolerance limits
• No excess material required to be added for sanding = reduction of production costs (0.1 mm ~ 0.8% material)
• Display of optimisation potentials after changes in the production (intentional or unintentional)
• Measurement data to regulate the press

Design and Construction of the System
The innovative frame concept of the thickness gauge includes an optimised frame construction and allows non-warping, temperature-resistant measurements using carbon fibre components.

An optimum distribution of horizontal forces by a concentric track arrangement was considered and contributes to the high precision. The closed frame protects all components, such as cable and air channels, measuring head electronics and compressed air supply, against damage from surrounding industrial environment. A modification of the conveyor is only necessary in individual cases. Easily accessible inspection flaps allow optimum access to the measuring system at any time.

Measurement is done in a contact way which allows absolute measurement of dimensionally stable materials, such as MDF, OSB, particleboard, leather, caoutchouc, plexiglass, insulating paper. The selection of the measuring heads is specified according to the material to be measured.
An automatic calibration system ensures a consistent measuring accuracy of the system

Measuring Principle

A consistent measuring accuracy of the system is ensured by an automatic calibration system. For contact measurement, high-precision rollers contact the material and convert thickness variations into vertical motion within the transducer. The measurement is achieved with an optical element inside the transducer heads.

The measuring heads are installed in pairs, opposite each other, above and below the panel to ensure accurate measurements, even during bending or vertical movement of the panel. To protect the measuring heads against mechanical damage, they are equipped with relatively large rollers. The top heads have special inclined inlet rails to avoid damage through blisters, for example.

ct-Frame

To increase the continuous system availability, the DMR 6000 can be equipped with a ct-frame. The system can be serviced at any time by moving the ct-frames sideways out of the production line. Maintenance, diagnostics and repairs can be carried out during the running production.

Additionally, the mobile construction of the system allows an escape run in case of big blisters and thus prevents the measuring system from being damaged.

Measuring System Analysis (MSA), Type-1 Study

GreCon checks the accuracy and repeating accuracy of a DMR 6000 during the internal system check after the system is built. The measurement capability of the system is a calculation of statistical quality parameters based on the measured results. The operator can repeat this procedure at any time after installation and start-up of the measuring system thus providing a reproducible system check.
User-Friendly, Simple, Robust and Accurate

High availability, operational reliability and, above all, consistent measuring quality are ensured by thecalibration with integrated self-diagnosis system and the construction of the system. This leads to high confidence in the system and acceptance by the operator. The MSA ensures that the displayed information constitutes a reliable basis for the monitoring and optimisation of the production process.
Set-point positioning of the measuring heads

Set-Point Positioning

The measuring heads will stay in their positions after the last measurement. This reduces the mechanical strain of both the panel edges and the measuring heads. The consumption of compressed air is also reduced. Even with compressed air failure, the heads will stay in their last position.

Combination with other Measuring Systems

Since the thickness gauge is a modular system, it is possible to change the measuring requirements at any time. The system can be combined with the Ultrasonic Measuring System UPU 6000 and a Board Scale to provide a quality assurance station. This combination is primarily used after continuous presses.

Calibration

An automatic calibration system ensures consistent measuring accuracy for all measuring principles. The measuring heads are brought together and calibrated. For thickness measurement with ct-frame, calibration is done outside the material flow which makes a utilisation in endless productions and panel productions with small panel gaps possible.