acpro

Profile measurement and controlling

Efficient and reliable management in the manufactoring process of the plastics industries involves higher demands to control- and monitoring systems. High accuracy and an extensive range of functions must be combined with an easy handling and a minimum of maintenance efforts. ACPro Systems are intelligent and communicative.

The input of setpoints, process data and process parameters occurs via Touch screen or keyboard. The cross profile control happens via controlling the actuators (heating bolts, stepper motors, ...) and makes sure the equal distribution of the gramage in machine cross direction. In case that heating bolts are used as actuators and feedbacks of the actual temperature values   are available, integrated temperature control loops are foreseen optionally. The control of the actuators works via an analogue output value or via digital output pulses (The length of the pulse correlates to the analogue value), discrete or via bus coupling. The scanned profile, the actuator-oriented measuring profile and the  actuator output profile are shown on the main control monitor page of the CPC (cross profile control).

General information on the beams

acpro2The measuring sensors are integrated in continously moving sledges of high-precision measuring frames. The measuring system built up by this sensor moving permanently across the  web, allows a continious measurement of the relevant web parameters in machine- and cross direction. The incoming signals from the measurement-system are transfered to the process control system via IO-modules on a fibre optic bus or a Profibus. The frequency converters controlling the sledge movement, the signal converters for the sensors, the sensors power supply and the power supply for the IOs and limit switches of the crossbeam are built in a cabinet mounted on or close to the beam system. The measuring system operates applying bus systems of the latest technologies like fibre optic and Profibus and by this allows decentralized design and a high performance of the machine.

 acpro3The input of setpoints, process data and process parameters occurs via Touch screen or keyboard. The cross profile control happens via controlling the actuators (heating bolts, stepper motors, ...) and makes sure the equal distribution of the gramage in machine cross direction. In case that heating bolts are used as actuators and feedbacks of the actual temperature values are available, integrated temperature control loops are foreseen optionally. The control of the actuators works via an analogue output value or via digital output pulses (The length of the pulse correlates to the analogue value), discrete or via bus coupling. The scanned profile, the actuator-oriented measuring profile and the  actuator output profile are shown on the main control monitor page of the CPC (cross profile control).

The infrared sensor

All measuring frames are equipped with photo cells for detection of the web edge. The function of this photo cells is monitored and a breakdown of a cell is indicated as an alarm and also stored in the alarm list. The operator has the possibility to give fixed turning points and so an operation is also guaranteed without the photo cells. The resolution of the measurement amounts to approximately 1000 elements in cross direction. The scan time for a web width of e.g. 3300 mm is approximately 20 sec. The measuring principle is a NIR/MIR coating measurement in Conesplit Same Spot Technology.

acpro4

The new ACPro-Infrared sensor with CONESPLIT-Optic®* is applicable for a direct selective online-measurement for coatings on organic  or polymer basis.  Because of the parallel assembly of 6 optical-electronic channels, the spectral properties of the web  are scanned simultaneously on the same spot (Same-Spot-Technique). hrough an application oriented selection of the measuring wavelength only the relevant ranges of the spectrum are used. The redundant information, given on other full spectrum analysis tools, is avoided, and thereby the CONESPLIT-Optic method increases the measuring speed. The newly developed CONE-SPLIT-Optic divides the different measured wavelengths of the light beam for the specific detectors nearly free of losses. The signal gain and consequently the  signal-noise-rate is 10 to 100 times higher than with the usage of integrated spheres (Ulbricht-Kugeln). acpro1Because of the wavelength neutral optic the near infrared range (NIR 1,0 bis 2,5 µm) and the medium infrared range (MIR 2,5 bis 4,0 µm) are usable at the same time. This gives the important advantage that in each case the absorption band with the highest resolution related to the layer substrate is measured.  
A stable sensor housing with a simple standard 24V-power supply, integrated infrared-source, optional cooling and the reliable fibre optic or Profibus respectively current interfaces make the sensor a measuring device for the selective layer measurement for multiple use. The sensor can be integrated in existing scanners or be operated independently.

//2017-01-23 CSt: Added for google maps support on new domain