Image formation device and overcurrent detection method

An overcurrent detection method executed in an image formation device including a plurality of motors each including an output shaft, comprising:

• overcurrent detection processing for detecting an overcurrent with respect to a resultant current including currents flowing through the plurality of motors;
• load application processing for applying, while the plurality of motors are being rotated, a load for causing fluctuation components to be generated in the resultant current to the output shaft of at least some of the plurality of motors, the fluctuation components enabling the currents of the plurality of motors to be distinguished from one another;
• and
• specification processing for specifying, when the overcurrent is detected, a motor that is a cause of the overcurrent from among the plurality of motors based on the resultant current, wherein
• in the load application processing, the load that periodically fluctuates along with a rotation of the output shaft is applied, by a load application portion, to the output shaft of the at least some of the plurality of motors, and
• the load application portion includes:
• a cam which is fixed to the output shaft of the at least some of the plurality of motors and rotates along with the output shaft, and
• a pressing portion which comes into contact with an outer circumferential surface of the cam and presses a contact portion on the outer circumferential surface of the cam toward a side of the output shaft.