Leading edge detection

Leading edge detection with MultiTask photoelectric sensors is used to optimize object spacing before singulation or infeed to the main sorters. The sensor signal allows precise adjustment of the speed of the separate belt segments. The Reflex Array MultiTask photoelectric sensor with its light band is used when objects with varying leading edge such as polybags have to be detected reliably.

Alternatively, a combination of light grids and high-resolution encoders enable leading edge detection as well as the detection of the footprint and alignment of the objects on the conveyor belt. The duration of light grid interruption and the speed of the belt measured by the encoder provide additional information about the length of the objects.

  • Following product families can be used
    The photoelectric sensor with the 2D light array: multifaceted and economical
    • RAY10: 25 mm-high light array, detects objects ≥ 5 mm
    • RAY26: 55 mm-high light array, three variants, detects objects ≥ 3 mm, ≥ 5 mm or ≥ 10 mm
    • Display for predictive maintenance on the sensor; transmits maintenance signals to the PLC via IO-Link
    • Conveyor belt suppression for RAY26
    High-resolution and high-speed detection of the smallest objects
    • 2 mm resolution
    • Response time 3 ms
    • Detection height 50 mm
    • Cable synchronization
    • PNP or NPN with Q or Qnot outputs (NO/NC)
    • 1 x test, 1 x teach-in input
    • M12 male connector, 8-pin
    Flexible in use for length, width and height measurements
    • Beam separation: 2.5 mm, 5 mm, 10 mm, 20 mm, 25 mm, 30 mm, 50 mm
    • Maximum range: 12 m
    • Functions: Cross beam measurement, 4 x zone measurement, high-speed scan, transparent mode
    • Interfaces: PNP, analog, RS485, IO-Link, PROFINET, PROFIBUS, EtherCAT®, EtherNet/IPTM, CANopen
    • Sun resistance mode with reliable switching threshold