Due to the size and shape of items on many automated packaging lines, it is necessary to measure boxes and components in a 3D format as they progress through the system.
According to Gerry Bryant, managing director of Countapulse Controls, Leuze light curtains can be configured as a portal for size detection on automated lines. “A classic example of the success of this principle is at an Italian logistics company, where the system was required to measure the size of the boxes as they travelled along the line. Leuze supplied three cascading CML 720i PB light curtains and the client was very pleased with the success of the system.”
Bryant points out that the incorporation of a number of light curtains in a cascade format results in more comprehensive and faster measurement of items. In addition, the detection of transparent media enables object tracing on conveyor belts.
“The Leuze light curtains monitor a large measurement field of up to six metres, with a dead zone of just 23 mm between beams. Depending on the configuration and model, the devices are suitable for a variety of measurement tasks with various resolutions. They can be readily integrated into different fieldbus environments, such as Profibus, CANopen, RS-485 and IO-Link for direct configuration via the control panel. This eliminates the need for additional gateway boxes, as well as the corresponding space requirements and effort required for mounting,” explains Bryant.
The cycle time is 1,36 ms and the response time per beam is just 30 µs. The units have an easy to read display with a robust membrane keyboard and bar graph display for easy alignment and can operate in ambient temperatures of between -20 and 60°C.
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