How does the AGV carrying payloads of huge heights as compared to it's size turn without turning the payload? Even if the body is attached to a center bearing, the bearing is very smooth then how come these bots are able to rotate so precisely?
Some use omni wheels, others use mecanum wheels. https://www.superdroidrobots.com/shop/category.aspx/robot-kits-omni-wheels/61/
It can also just sit the stack down on it's legs when turning if it needs to.