Paper Feeder - Oki B930 Service Manual

END GUIDE
The Paper Cassette is so designed that it can adapt to the paper length in the paper feed
direction by moving the END GUIDE to the left or right.
BOTTOM PLATE
The force pushing up the BOTTOM PLATE is transmitted by the driving force of the MOTOR
on the FEEDER ASSEMBLY to the LIFT UP SHAFT through the GEAR (13T/60T) and SEC-
TOR GEAR (60T). The BOTTOM PLATE is pushed up by turning the LIFT UP SHAFT, which
causes the supplied paper to get in contact with the ROLLER ASSY (NUDGER).
• Paper Cassette
MSI
Detection of paper size
The paper size to which the cassette is set is transmitted to the switches S/W1 to S/W5 on
the TRAY 3/4 PAPER SIZE SWITCH by moving these guides. The paper size is detected by
the ON/OFF information of these switches.
Paper sizes that can be automatically detected are as 4.1 Paper Size Control:

Paper Feeder

Since the Tray3 and Tray4 are functionally equivalent in terms of the TRAY 3/4 PAPER SIZE
SWITCH, NO PAPER SENSOR, LEVEL SENSOR and PRE FEED SENSOR, only the compo-
nents of one tray are described here.
The Paper Feeder is a mechanical unit for supplying paper from the Paper Cassette to the
printer. The driving force from the TRAY 1/2 FEED LIFT UP MOTOR on the FEEDER ASSY is
transmitted to the three ROLLER ASSYs to feed paper.
When the ROLLER ASSY (NUDGER) picks up some sheets of paper and the remaining paper
decreases, the ACTUATOR (SUPPORT ASSEMBLY) of the LEVEL SENSOR lowers accord-
ingly. When the LEVEL SENSOR detects the lowering, the TRAY 1/2 FEED LIFT UP MOTOR is
activated to turn the LIFT UP SHAFT and the BOTTOM PLATE is also lifted accordingly. Thus,
the remaining paper is ready to be fed out.
TRAY 1/2 FEED LIFT UP MOTOR
This motor is activated to feed paper and to lift the BOTTOM PLATE. When feeding paper, it
rotates forward to drive the ROLLER ASSY (NUDGER). When lifting the BOTTOM PLATE, it
rotates reversely to drive the tray module gears to turn the LIFT UP SHAFT.
TRAY 3/4 PAPER SIZE SWITCH
TRAY 1
TRAY 2
TRAY 3
TRAY 4
2-25
OPTION
2 TRAY MODULE