Engine Hardware Specifications; Engine Firmware; Driver; Transfer - Ricoh M000 Service Manual

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Engine Hardware Specifications

6.4 ENGINE HARDWARE SPECIFICATIONS

By gearing, the main motor drives the rollers such as the feed roller, developing roller, fuser

roller, and exit roller. The BLDC motor is controlled for such acceleration section and

steady section. The BLDC main motor is operated by the BLDC clock and the enable

signal.

The charging voltage, developing voltage and the transfer voltage are controlled by PWM

(Pulse Width Modulation). Each output voltage is changeable due to the PWM duty. The

transfer voltage set when the paper has passed the transfer roller is decided by the

conditions of the environment in which the machine is operating. The resistance value of

the transfer roller changes in accordance with the surrounding environment, and the

voltage value, which changes in accordance with the operating environment, is controlled

with the AD converter. The voltage value for impressing to the transfer roller is decided by

the changed value.

The temperature change of the heat roller's surface changes according to the resistance

value through the thermistor. By converting the voltage value, which is impressed to the

resistance, to the digital value through the AD converter, the temperature is decided. The

AC power is controlled by comparing the target temperature to the value from the

thermistor. If the value from the thermistor is out of controlling range while controlling the

fusing, the error stated in the below table occurs.

M000/M009

CÓPIA NÃO CONTROLADA

6-10

CÓPIA NÃO CONTROLADA

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M009