Feeder Block Operation - Oki B930 Service Manual

Roller
Retard Roll
(on Cover Assy Top)
Feed Roll
Nudger Roll
Take Away Roll
Feed Out Sensor
Pre Feed Sensor
Feed Motor
Tray
T/A Motor

Feeder Block Operation

Upon receiving the feed start signal from the controller, the HCF activates the Nudger Solenoid
after a preset time has passed to press the Nudger Roll against the paper in the Tray.
Further, after a preset time has passed after receiving the feed start signal, the HCF rotates for-
ward the Feed Motor to feed paper from the Tray to the Feed Roll side with the Nudger Roll.
When the end of paper reaches the Pre Feed Sensor (reflective photo-sensor) and the Sensor
turns ON, the Nudger Solenoid is deactivated so that the Nudger Roll separates from the paper
in the Tray.
The Nudger Solenoid keeps activated at high-voltage for a specified time from its actuation. After
that, it still keeps activated at low-voltage until it is deactivated. If the HCF receives the feed start
signal for the next paper while the solenoid is activated at low-voltage, it maintains the actuation
state at the low-voltage, while pressing the Nudger Roll against the paper in the Tray.
When the paper is transferred to the IOT and the Feed Out Sensor turns ON, the Nudger Sole-
noid is re-activated for a preset time.
Feed Motor start/stop timing and revs are controlled based on the Feed Motor Start signal and
the Pre Feed Sensor ON timing.
Thus, paper is fed from the Tray to the Transport Block.
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