Panasonic FA-S280 Service Manual ▷ View online
2-2
Operation
(3) Nonsort mode
The sorter stores all copies of all originals into the top bin (bin # 1). Up to 100
copies are available.
The bin holder stays at the home position and does not move.
2.2 Mechanism Section
2.2.1
Paper Feed Mechanism
The main components of the paper feed mechanism are as follows:
• Sensor P bracket ass’y (including the enter sensor ass’y and exit sensor ass’y)
• Feed motor ass’y
• Feed roller ass’y
The paper feed mechanism has two photo sensors (photointerrupters), enter sensor
and exit sensor. The enter sensor detects the paper fed from the copier. While the
exit sensor detects whether the paper entered is correctly ejected to the bin. If the
paper stays at the exit sensor for more than the predetermined period of time, the
CPU judges that a paper jam has occurred.
SV006
Exit Sensor Ass'y
Enter Sensor Ass'y
Paper
Feed Roller Ass'y
[Paper not inserted]
[Front View]
[Paper inserted]
2-3
Operation
When the paper fed from the copier reaches the sorter and the enter sensor is
activated by the paper, the feed motor (stepping motor) is driven.
The feed motor turns in the direction of the arrow as shown in the figure and, via
two idle gears, the feed roller ass’y turns in the direction of the arrow to feed the
paper onto the bin.
SV007
Paper
Idle
Gear
Gear
Feed Motor Ass'y
Feed Roller Ass'y
2-4
Operation
2.2.2
Sorting Mechanism
The main components of the sorting mechanism are as follows:
• Lift motor ass’y 1
• Sensor E bracket ass’y
• Front bracket ass’y
• Bin holder ass’y
• Rear bracket ass’y
• Bin bottom sensor ass’y
• Shaft ass’y
• Bin top sensor ass’y
• Encoder ass’y
(1) Lifting up/down of the bin holder
The bin holder has 10 bins and is lifted up and down by the lift motor (DC
motor).
To lift up the bin holder for sorting pages, the lift motor is turned in the direction
of the arrow as shown in the figure. As the lift motor turns in that direction, the
lift cam (spiral cam) of the rear bracket ass’y turns clockwise so that the bins
lift up. Since the pins of bins (bin trunnion) are engaged in the groove of the lift
cam, the bin are lifted up along the groove.
The power of the lift motor is also transmitted to the other side of the lift cam
in the front bracket ass’y via the shaft ass’y. So, both lift cams turns
synchronously and the bins are lifted up while keeping their horizontal position.
When the lift motor turns in reverse, the bins are lifted down.
Bin
(Lift Cam)
Front bracket
ass'y
ass'y
Shaft ass'y
SV008
Rear bracket ass'y
Lift motor ass'y
Bin bottom
sensor ass'y
sensor ass'y
Bin top sensor
ass'y
ass'y
Shutter
(Lift Cam)
2-5
Operation
The encoder ass’y is directly coupled to the lift cam shaft of the front bracket
ass’y.The encoder ass’y is used to detect the position of the bin holder. It has
a disk with a slit.
One turn of the disk corresponds to one step lift-up or lift-down of the bin
holder. As the lift motor turns and the disk turns accordingly, the encoder
sensor ass’y (photointerrupter) of the sensor bracket ass’y detects the slit and
produces a pulse.
Every time the bin holder is lifted up or down by one step, the pulse is produced
so that the CPU can monitor the current bin holder position.
(2) Initialization at power ON
When the sorter is powered, initialization sequence is carried out and the bin
holder is positioned to the home position (lowermost position).
Initialization when the bin holder is in home position:
The lift motor turns to lift up the bin holder by one step. Namely, the lift motor
turns until the encoder sensor detects the slit of the encoder ass’y.
Then, the lift motor turns in reverse to lift down the bin holder. When the
shutter of the bin holder blocks the bin bottom sensor (photointerrupter), the
lift motor stops there.
This position is referred to the home position of the bin holder. (See the figure
on preceding page.)
Initialization when the bin holder is not in home position:
The lift motor turns to lift down the bin holder.
When the shutter of the bin holder blocks the bin bottom sensor
(photointerrupter), the lift motor stops there (at the home position).
(3) Bin top sensor
The bin top sensor is prepared to detect whether the bin holder reached the
upper limit. When the bin holder reaches the upper limit, the shutter of the bin
holder blocks the bin top sensor (photointerrupter) and upper limit is detected.
SV009
Encoder ass'y
Encoder sensor ass'y
Front bracket ass'y
Bin
Click on the first or last page to see other FA-S280 service manuals if exist.