Image forming apparatus

An image forming apparatus comprising:

• an image forming unit configured to form a toner image on a recording medium;
• a rotating member;
• an endless belt configured to form, in cooperation with the rotating member, a nip portion configured to fix the toner image formed by the image forming unit to the recording medium;
• a first roller and a second roller configured to rotatably support the belt;
• a stepping motor;
• a drive transmitting unit configured to transmit drive of the stepping motor to the first roller so as to tilt the first roller;
• an output unit configured to output an amount-of-rotation signal instructing an amount of rotation of a rotor in the stepping motor;
• an electric current control unit configured to control electric current to be fed to a coil in the stepping motor based on the amount-of-rotation signal output from the output unit;
• a measuring unit configured to measure an amount of rotation of the stepping motor based on the amount-of-rotation signal;
• a detecting unit configured to detect a position of the endless belt;
• and
• a notifying unit configured to display a notification to issue a warning regarding the stepping motor in a case where a predetermined difference or greater arises between the amount of rotation of the stepping motor measured by the measuring unit and the amount of rotation of the stepping motor based on the amount-of-rotation signal in a state that an image formation process is able to be executed and to display a warning that the image formation process is unable to be executed in a case where a home position sensor of the stepping motor is not switched from on to off or from off to on within a predetermined time period.