Patent ID: 9365059
Filing Date: 2016-06-14
CPC Classification: B41J,H02P

Claim Text:
1. A motor control method performed by a controller, comprising: monitoring a motor load of at least one of a plurality of motors including a first motor and a second motor driven by one common power source having a protection circuit, wherein the protection circuit is operated to shut down the power source in a case where a current value of the power source continues to exceed a threshold Cth during a period Tg; stopping motor drive in a case where the monitored motor load continues to exceed a threshold Mth during a period Tm, which is shorter than the period Tg; and in a first operation where both the first motor and the second motor are driven, skipping the monitoring of the motor load during acceleration operations of the first motor and the second motor and then starting the monitoring of the motor load, and in a second operation where the first motor is driven and the second motor is not driven, monitoring the motor load during the acceleration operation of the first motor, wherein the threshold Mth in monitoring the motor load in the first operation is lower than in monitoring the motor load in the second operation.