Read Panasonic FA-S280 Service Manual online
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
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