Functions Of Stapler Sensors/Motors - Oki B930 Service Manual

Stapling operation is executed by closing the Stapler Head.
The Stapler Head, containing the Staple Motor, the Staple Home Sensor, the Self Priming Sen-
sor, and the Low Staple Sensor, is activated by the Staple Motor.
Forward (clockwise) rotation of the motor drives the Stapler to staple a set of sheets, and returns
the stapling unit to the home position.
If stapling fails, the motor rotates reversely (counterclockwise) to return the Stapler Head to the
home position.
When staples become low, the Low Staple Sensor detects it and stapling stops automatically dis-
playing an alarm message. The message is also displayed when the Staple Cartridge is not
installed.
Low Staple Sensor
Staple Motor

Functions of Stapler Sensors/Motors

1. Stapler Move Home Position Sensor
A photo-interrupter to detect the Stapler home position, Rear Staple (Corner) position, and
Rear Staple (Straight) position. It turns "H" (+5 V) (light blocking) when the Stapler comes at
the specified position.
2. Stapler Move Motor
A DC motor to move the Stapler Head. Clockwise rotation of this motor moves the Stapler
Head to the rear side, while counterclockwise rotation moves the Stapler Head to the front
side.
3. Low Staple Sensor (in the Stapler Head). A photo-interrupter to detect near end of staples
It turns "H" (+5 V) when staples become 20 staple left.
4. Self Priming Sensor (in the Stapler Head)
A photo-interrupter to detect that staples are at the Stapler Head end, and also to detect fail-
ure in stapling. "L" (0 V) (light blocking) when stapling is ready.
5. Staple Home Sensor (in the Stapler Head)
A photo-interrupter to detect the Stapler Head home position, and also to detect failure in
stapling. This sensor also functions as a trigger to stop the Staple Motor. It turns "L" (0 V)
(light blocking) while the Stapler Head stays at the home position.
6. Staple Motor (in the Stapler Head)
A DC motor to activate the Stapler Head for stapling. Clockwise rotation of this motor
enables stapling, while counterclockwise rotation returns the Stapler Head.
Staple Home Sensor
Self Priming Sensor
Stapler Head
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