Image forming apparatus that cleans detection surface of sensor for detecting developer accommodated in containing unit

An image forming apparatus comprising:

• a containing unit configured to contain developer;
• an image forming unit including a developing unit to which the developer in the containing unit is supplied, and configured to form an image using the developer in the developing unit;
• a motor;
• a stirring member provided in the developing unit, and configured to be rotated by the motor to stir the developer in the developing unit;
• a first sensor provided in the developing unit and configured to detect the developer within the developing unit;
• a rotating member configured to be moved to a restricting position where the rotating member is capable of restricting an amount of the developer to be supplied to the developing unit;
• a transmission mechanism configured to transmit a driving force of the motor to the rotating member;
• a cleaning unit including a cleaner for cleaning a detection surface of the first sensor, and configured to be controlled, in a case where the rotating member is being rotated, to be moved to a first position in which the cleaner slides on the detection surface, and to be moved a second position in which the cleaner is separated from the detection surface;
• a second sensor configured to detect a rotational phase of the rotating member;
• and
• a controller configured to control a timing at which the transmission mechanism stops transmission of the driving force from the motor to the rotating member so that the rotating member is moved to the restricting position, based on a result of detection of the rotational phase of the rotating member by the second sensor and a rotational speed of the motor.