Drive And Cutting Mechanism - Ricoh C226 Service Manual

2.2 DRIVE AND CUTTING MECHANISM

Start Signal
Timer
Drive Motor
Home Position
Sensor
Task Completion
Signal
The tape dispenser uses a stepping motor, which is driven at 460 pulses per
second, as a drive motor.
When the print counter of the main body becomes 0, the start signal from the
main body will change from high (+5 VDC) to low (0 VDC) to start the timer
on the tape dispenser PCB. When the start signal changes to high, 10
milliseconds later, the drive motor [A] will start to rotate counterclockwise to
feed tape. However, since a one-way bearing is mounted in the cam drive
gear [B], the cutter cam [C] will not rotate.
The drive motor will start rotating in the opposite direction for 2,500
milliseconds after the timer had started. At this time, the tape has been fed
out 250 mm (9.8") from the tape dispenser. The drive motor will rotate the
cam drive gear clockwise and the eccentric shaped cutter cam will press
down the cutter arm [D]. The cutter [E] will then move downward to cut the
tape. The cutter spring [F] will return the cutter to its original position. After
the cutter home position sensor [G] detects the cutter actuator [H], the drive
motor will stop and the tape dispenser PCB will send the task completion
signal to the main body.
SM
[F]
[C]
[E]
[G]
[H]
[D]
10 ms
2500 ms
Forward
7-3
BASIC OPERATION
[B]
[A]
Reverse
100 ms
C226