| 主权项 |
1. A method for controlling a fuser heater of a fuser assembly for an electrophotographic device, the method comprising:
initiating a preheat operation for preheating the fuser heater; when the fuser heater temperature reaches a predetermined temperature during the preheat operation, reading, by the electrophotographic device, current and voltage of the electrophotographic device for a plurality of consecutive AC cycles; from the current and voltage readings, determining, by the electrophotographic device from the plurality of consecutive AC cycles, heater on cycles in which power is applied to the fuser heater and heater off cycles in which power is not applied to the fuser heater; calculating, by the electrophotographic device, heater power from the current and voltage readings and the determinations of the heater on cycles and the heater off cycles, the heater power being the power of the fuser heater during a predetermined heater on cycle of the consecutive AC cycles; calculating, by the electrophotographic device, a fuser heater voltage of the fuser heater during the predetermined heater on cycle based on the voltage readings; calculating, by the electrophotographic device, a resistance of the fuser heater based on the calculated heater power and the calculated fuser heater voltage; and controlling the fuser assembly based upon the calculated resistance of the fuser heater, wherein calculating heater power comprises comparing a power level of the imaging device in a first heater off cycle of the consecutive AC cycles to a power level of the imaging device in a second heater off cycle of the consecutive AC cycles, wherein the heater power calculation is based upon the comparison. |
