The moment the pallet reaches the transfer station, the laser scanner mounted above the conveyor frame sweeps the load. Its beam detects the exact height and contour of the stacked cartons, checking for misaligned edges or protruding flaps that could jam the downstream robotic arm. If the scan confirms the load is square and stable, the system releases the pallet to the next cell; if not, the conveyor halts and signals the operator. In automated assembly lines, this same scanner often sits beside a gantry, verifying that each car body panel is correctly positioned before welding robots clamp the seams. The scanner’s role is not to measure distance but to provide a continuous profile of the moving part, enabling the control system to adjust gripper positions in real time. On packaging machines, it ensures that shrink-wrapped trays are free of bulges before they enter the sealing tunnel, preventing film tears and unplanned stops. In all these cases, the scanner acts as the eyes of the automation system, translating physical shapes into data the PLC can use to keep the line running without manual checks.