Test & measurement monitoring in-Line accumuLation on a singLe fiLer
Monitoring clear bottles as they are removed from a depalletiser and progress through a single filer can be challenging. The transparency of the targets and the unstable signal from the movement of the bottles can be difficult for many sensors to detect reliably.
cleAR tARgets And An UnstAble signAl When bottles are removed from a depalletiser the bottles are swept off of the pallet by a sweeper arm, layer by layer. The bottles eventually start to move into a single file and continue downstream. It is important to monitor the bottles in the staging area to make sure that they have moved on before another layer is swept onto the conveyor. However, the unstable signal from the moving bottles and low contrast objects, can be challenging for sensors to detect reliably.
lAseR distAnce sensoRs witH bAckgRoUnd sUPPRession The Q5X background suppression sensor detects when the staging area is clear of bottles, and the system is ready for the next layer of containers. The integral timing delay on the Q5X filters out any small gaps between objects as they move in a cluster. The background suppression function of the Q5X is also
important in this type of environment because the sensor can be set to only detect objects within a defined sensing field and ignore anything that is located beyond the sensing field cutoff point. Also, in dual teach mode - which measures both distance and light intensity - the Q5X can reliably detect the presence of clear bottles without the risk of double counting.
Verify Presence and Position of sheets on a stamPing Press
Verifying the presence of reflective metal sheets on a stamping press can be challenging. The reflectivity of the target can be difficult for many sensors to detect reliably, and the harsh environment can damage sensors that are too close to the process.
A Reflective tARget And A HARsH enviRonment In metal stamping press applications, metal sheets must be placed and properly indexed on the press before stamping. A solution is needed to both verify that a metal sheet is present in the press and also verify that the sheet is positioned correctly on the press to reduce the risk of material waste and/or damage to the press die. The challenge is that metal parts are reflective, which can be difficult for
many sensors to detect. In addition, in stamping press applications, the background is often a similar colour to the parts being detected, which can further reduce the reliability of many sensors. In addition, the sensor must be mounted away from press to reduce risk of damage to the sensor.
A HigH PoweR, mid-RAnge lAseR distAnce sensoR A distance-based background suppression detection sensor, like the Q5X laser distance sensor, is ideal for these applications because the sensor can both verify part presence and ensure that parts are properly indexed by verifying the leading edge of the material in the press. This reduces inventory and maintenance requirements, because one sensor can be used to determine both conditions. In addition, the Q5X can reliably detect shiny objects even at an acute angle,
and with background suppression, the sensor can ignore anything located beyond the cutoff point. Furthermore, with a range of up to 2m, the Q5X can be mounted safely outside of the harsh process environment, reducing the risk of damage to the sensor, which saves replacement and maintenance costs. This
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ensures a reliable, long term solution with minimal maintenance requirements. The Q5X sensor solves the most difficult distance-based applications,
even at acute angles. The Q5X reliably detects black targets against a black background, black targets against a shiny metal background, clear and reflective objects, multicolour packaging, and targets of all colours. With industry-standard rectangular housing and 270-degree rotatable
M12 QD, the Q5X sensor is compact and flexible to meet a wide variety of mounting constraints. In addition, an extensive offering of metal protective brackets enable the sensor to withstand the most difficult industrial environments.
October 2019 Instrumentation Monthly
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