Brother P-touch PRO DX PT-9200DX, Service Manual

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2.1.5 Tape Automatic Half Cutter Mechanism
The tape automatic half cutter mechanism consists of a stationary plate and a half
cutter holder (equipped with a cutter blade) which is operated by the half cutter
motor.
Half cutting is performed only for laminated tapes.
Upon completion of printing and tape feeding, the CPU activates the half cutter
motor (DC motor) whose counterclockwise rotation is transmitted to the half rock
gear by the clutch gear and the three idle gears.
As the half rock gear rotates counterclockwise, its groove “D” (into which the
projection on the half cutter holder is inserted) operates the half cutter holder to
pivot it around shaft “E”. The stationary plate is provided with space as wide as the
separator of a laminated tape. A laminated tape is pressed against the stationary
plate by the half cutter holder for half cutting.
Half cutting refers to cutting a tape except its separator.
Subsequently, the CPU rotates the half cutter motor counterclockwise to return the
half cutter holder to the home position. Part “F” of the half rock gear presses the
half cutter sensor switch provided on the half frame. The moment the CPU receives
the sensor signal, it stops the half cutter motor.
Fig. 2.1-6 Tape Automatic Half Cutter Mechanism
Half cutter sensor
Half rock gear
Half cutter holder
“F”
“D”
Half cutter motor assy
“E”
Stationary blade
Tape
Separator
Cut line