公开(公告)号：US20210072318A1

公开(公告)日：2021-03-11

申请号：US16645322

申请日：2018-02-27

Applicant: HP PRINTING KOREA CO. LTD.

Inventor： In PARK ,  Byung Sun MIN

IPC: G01R31/34 ,  B65H3/06 ,  G03G15/00

Abstract: An engine portion to perform an image forming job, a motor to drive the engine portion, and a drive circuit to provide power to the motor are included in an image forming apparatus. The drive circuit includes a sensor that detects a current amplitude of the power provided to the motor. A processor of the image forming apparatus provides a drive command to the motor and determines whether the motor is abnormal based on the drive command and a current amplitude detected after the drive command is provided.