Ros Control; Fuser Control - Oki B930 Service Manual

A3 SEF
B5 LEF/Executive LEF
8K SEF(TFX/GCO)
B4 SEF
8.5" x 11"LEF
16K LEF(TFX/GCO)
11" x 17"LEF

ROS Control

Rotation of ROS Motor
The ON/OFF control of the ROS Motor is performed according to the mode of operation as
shown below.
Operation mode
Standby mode
Print mode
Sleep mode
Determination of ROS Ready
The ROS goes into ready state after the specified period passes since the reception of the ROS
MPA start signal and the SOS cycle exceeds the reference value.
ROS Reference Value
ROS reference value
Ready reference value
Fail reference value

Fuser Control

Fuser Control Method
The ON/OFF control of the Main/Sub Heater Rods is performed based on the Fuser control tem-
perature. The Fuser transits between the five states (Warm UP, Ready, Standby, Print, and Low
Power) depending on the Heat Roll surface temperature or printer conditions.
The Fuser temperature control starts when the Fuser Ready in the POWER UNIT is turned ON
after a preset time period has passed from power ON. If a failure occurs, the Heater Rods are
turned OFF, then the Fuser Ready is turned OFF, and then the Fuser temperature control is
stopped.
Main/Sub Heater Rods ON/OFF Control
The Center and Rear Thermistors detect the Heat Roll surface temperature (Fuser temperature)
to regulate the temperature at the target control temperature by turning ON or OFF the Main/Sub
Heater Rods.
Fuser Warm-up
ON OFF
ON ON
ON ON
ON ON
ON ON
ON ON
ON ON
ROS Motor ON/OFF
Always OFF
Turns ON upon receiving the signal from the
controller, and turns OFF after a preset time has
passed from the end of printing. Also turns OFF
if a print command is not received within 30 sec-
onds from the reception of the signal.
Always OFF
SOS signal interval (equivalent to 98% or more of the rated rpm of
the ROS Motor)
SOS signal interval (less than 98% of the rated rpm of the ROS
Motor)
2-18
ON ON OFF
OFF OFF ON
OFF ON OFF
OFF ON ON
ON OFF OFF
ON OFF ON
ON ON ON
Description