Pile preparation unit with pile turner

Provided is a pile preparation unit for changing a pallet support of a pile of sheets with a first end and a second end where the pallet has a support side supporting the pile of sheets at the first end. The pile preparation unit may include a rotation unit configured with an infeed opening for receiving a pallet with a pile of sheets, the rotation unit configured with a rotating structure to rotate a lift unit about a rotational axis. The lift unit is configured with a lift structure fixed to the rotating structure and has a lift plate movable along the lift structure to engage with the second end of the pile of sheets and to move and position the pile of sheets transverse, relative to the rotational axis, providing a portal for changing a pallet.