Protrusion monitoring on the tray stack

Four W4-3 photoelectric retro-reflective sensors embedded in the floor check the tray stack for protrusions and tilted trays. Two additional photoelectric retro-reflective sensors detect any workpieces protruding past the front or back of the pallet in the direction of feed. Photoelectric retro-reflective sensors with IO-Link are especially well suited for this task. Their internal microcontroller delivers optimal processing of the detection sequence with maximum frequency, thereby eliminating the need for time-consuming signal processing. W4-3 photoelectric retro-reflective sensors offer impressive performance thanks to a light spot that is highly visible, small and precise. This feature allows the sensors to "see through” covers and gaps between belts during operation. To prevent a collision, an additional photoelectric proximity sensor monitors the tray stack height as the stack is moved into the pallet handling machine.