Ricoh FT7770 Service Manual page 478

- Grip Assembly -
When the staple unit is lowered to a bin, the staple unit arm [A] makes
contact with and pushes down on the bin front side plate [B]. The grip motor
[C] (a dc brush motor) turns on and drives the gripper assembly spiral gear
[D] via the timing belts [E].
interlocked by bearings [G].) While the gripper motor turns on, the Job
indicator turns on.
- Gripper forward sensor and HP sensor -
The gripper forward sensor [H] and the gripper HP sensor [I] are amounted on
the grip assembly bracket.
grippers are moving.
forward sensor is actuated.
The grip motor turns off and the gripper solenoid is activated to close the
grippers. The grip motor then turns on to return the grippers to home
position, where the gripper HP sensor is actuated and the grip motor is
turned off.
- Initialization of staple unit and grippers -
When the main switch of the copier is turned on, the CPU first checks whether
the grippers are at the home position.
grippers to the home position.
is at the home position with the staple unit HP sensor.
unit drive motor returns the staple unit to the home position.
(The gripper assembly [F] and gear are
They track the actuator plate [J] while the
When the grippers move all the way forward, the gripper
The CPU then checks whether the staple unit
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If not, the grip motor returns the
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April, '89
If not, the staple