Sharp SF-S55N Service Manual page 87

SF-S55N
3) Bin shift motor control
The bin shift motor (M9) is a 4-phase control stepping
motor. ON/OFF and rotation direction of bin shift
motor (M9) are changed by controlling the output
timing of pulse signals A, A*, B, B*.
When the bin shift motor (M9) is in HOLD state, the
output timing of pulse signals A,A*, B, B* is fixed, and
Sorter controller control PWB
4) Bin shift motor rotation control
Continuous or intermittent rotation of the bin shift
motor which is used to drive the lead cams is
controlled based on the copy speed data which is sent
from the copying machine.
Continuous rotation: Copy speed 20 CPM or more
Intermittent rotation: Copy speed less than 20 CPM
In case of continuous rotation the microcomputer
provided on the sorter controller PWB controls the
a. Continuous rotation (copy speed 20 CPM or more)
Bin shift motor
(M9)
Lead cam position
sensor (PI20)
Position of roller
on lead cam
Bin
b. Intermittent rotation (copy speed less than 20 CPM)
Bin shift motor (M9)
Lead cam position
sensor (PI20)
Position of roller
on lead cam
Bin
Even level
Slope Slope
part
Stop
Up/Down Up/Down
Stopping on
Even level
Slope
even level part
part
Up/Down Stopping
9−17
the level of reference current signal (SFTAJ) is
changed for HOLD.
When the bin shift operation prohibition signal
(SFTLIM) is output, the bin shift motor (M9) cannot be
driven. The bin shift prohibition signal (SFTLIM) is
output when the paper holder sensor (PI11) is off.
Bin shift motor control PWB
Motor
driver
rotational speed of bin shift motor so that one shift
can be performed during interval of copy paper.
In case of intermittent rotation the microcomputer
provided on the sorter controller PWB controls the bin
shift motor as follows.
Paper unloading : Shifts the bin rollers to the
Transfer : One bin shift
Even level
part
Stop
Slope
Up/Down
Bin shift motor
boundary between the parallel
part and the slope and stops.