A detachable feed roller for using in the automatic feeder includes: a rotating shaft provided with a first connection structure arranged at the end of the rotating shaft and an actuating part; a fixed feed roller arranged around the rotating shaft and driven by the rotating shaft; a one-way feed roller arranged around the rotating shaft and provided with a cam part; a transmitting rotor arranged around the rotating shaft and, the transmitting rotor being disposed between the actuating part and the cam part; wherein, the transmitting rotor is pushed toward the one-way feed roller while the rotating shaft rotates forward in accordance to the transmitting rotor; and pushed away from the one-way feed roller while the one-way feed roller rotates forward in accordance to the transmitting rotor.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes at least one sensor to detect a position of a print media, a platform comprising a plurality of cellular omni wheels, and a processor communicatively coupled to the at least one sensor and the plurality of cellular omni wheels, wherein the processor calculates a desired movement of each one of the plurality of cellular omni wheels based on the position of the print media.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes at least one sensor to detect a position of a print media, a platform comprising a plurality of cellular omni wheels, and a processor communicatively coupled to the at least one sensor and the plurality of cellular omni wheels, wherein the processor calculates a desired movement of each one of the plurality of cellular omni wheels based on the position of the print media.