A manufacturer specialising in the production of precision aluminium alloy automotive parts supplies gearbox and engine housings to major automotive companies. To improve production capacity and product processing consistency, industrial robots were introduced to achieve automated loading. The pallet size is large, and when it is transported to the processing station by forklift, the positioning accuracy of loading becomes a problem due to the low placement accuracy and the error of about +20mm. On the other hand, the complex shape of the workpiece, frequent change, adjustment, maintenance, change of special tooling cost is high, after research, the user deployed 3D vision system to solve this problem, to achieve flexible production.