Transfer device (1) comprising: - a first sponsor (3), - a second conveyor (2) and - a lifting unit (6) which lifts and lowers at least one of the first and second conveyors (3, 2), wherein the first conveyor (3) has a first conveying path located in a fixed planar region and conveying an object (25) to be conveyed in a fixed direction, wherein the second conveyor (2) has a second conveying path arranged in the same planar region as the first conveying path and conveying the object (25) to be conveyed in a direction that crosses a conveying direction of the first conveying path, wherein the lifting unit (6) lifts one of the conveying paths above the other conveying path in order to convey the object (25) to be conveyed in a predetermined direction, wherein the lifting unit (6) comprises a lifting mechanism (8) with a plurality of combined elements and a motor (50), wherein the lifting mechanism (8) - converts a rotational force of the motor (50) into a movement in a lifting direction, - transmits the movement to at least one of the first and second conveyors (3, 2), - raises or lowers at least one of the first and second conveyors (3, 2) and - the rotation of the motor (50) stops when one conveying path reaches a predetermined height, wherein during the actuation process of the lifting unit (6) a body boundary identification process is carried out in which - the motor (50) is rotated to actuate the lifting mechanism (8) up to a physical
operating limit, and the motor (50) is then stopped, and - the control of the motor (50) is changed such that the motor (50) is rotated at a
low speed until the lifting mechanism (8) reaches the physical
operating limit, wherein, in the body boundary identification process, the motor (50) is rotated by
inertia and thereby
electric current is generated, so that the
electric current is substantially not supplied to the motor (50) from the outside, and wherein the transfer device (1) has a current detection unit that detects an
electric current flowing into the motor (50), wherein in the body limit identifying process, the motor (50) to which
inertia additionally acts is rotated, and a position at which the electric current flowing into the motor (50) changes abruptly or a position at which the electric current flowing into the motor (50) exceeds a fixed value is the physical
operating limit.