Image forming apparatus

An image forming apparatus to and from which a cartridge containing a developer is attachable and detachable, the image forming apparatus comprising:

• a rotary capable of containing the cartridge attached thereto and including a developing unit configured to contain the developer supplied from a discharge opening of the cartridge;
• a drive mechanism configured to rotate the rotary;
• and
• a controller configured to control the drive mechanism,
• wherein the developing unit has a receiving opening for receiving the developer supplied from the discharge opening,
• the controller comprises:
• at least one memory storing instructions;
• and
• at least one processor that is in communication with the at least one memory and that, when executing the instructions, cooperates with the at least one memory to execute processing,
• the processing including:
• controlling the drive mechanism to rotate the rotary to a first rotational phase in which the cartridge is able to be replaced when replacing the cartridge;
• rotating the rotary to a second rotational phase when developing an image using the developer supplied from the cartridge and contained in the developing unit;
• and
• controlling the drive mechanism to rotate the rotary in the first rotational phase so as to pass through a third rotational phase more than once and then reach the second rotational phase when an image forming operation is performed for a first time after the cartridge is replaced, if it is determined that a predetermined condition is satisfied,
• when the rotary is located in the first rotational phase, a direction from the discharge opening toward the receiving opening is an upward direction, and
• when the rotary is located in the third rotational phase, the direction from the discharge opening toward the receiving opening is a downward direction.