Epson TM-U675 - Drive Mechanism

Rev.D Product Overview Appendix D-35
TM-U675/U675P (with autocutter) Service Manual
Confidential
Drive Mechanism
The cutter motor is fastened to the cutter cover. The cutter motor gear is pressed into the motor
axis. The cutter motor is a DC brush motor. The cutter drive gear is rotatably supported on the
cutter drive gear shaft that is attached to the cutter cover. The cutter drive gear is held by an E-
ring. The autocutter deceleration shaft is held at both ends at the cutter cover. The autocutter
deceleration gear and the cutter worm gear are rotatably supported on the autocutter
deceleration shaft. The side walls relative to the autocutter deceleration gear and the cutter
worm gear are the clutch plates and the autocutter deceleration gear pushes the cutter worm
gear by the force of the cutter clutch spring. There is a thin metal washer between the autocutter
deceleration gear and the cutter clutch spring to allow smooth rotation. The force of the cutter
motor is transmitted to the autocutter deceleration gear and cutter worm gear from the cutter
motor gear to rotate the cutter drive gear.
A micro switch is attached to the cutter cover. The micro switch detects the position of the
blades (scissors blade and sliding blade). The cutter drive gear is a cam. The micro switch,
linked to the cam, is turned ON and OFF. The cutter motor and micro switch are connected to
the intermediate cable coming from the printer’s circuit board by the cutter lead wire.
Figure D-43
Movable blade shaft
Movable blade spring washer
Movable blade pressure spring
Scissors blade
Scissors blade transmission shaft
Stationary blade
Sliding blade bearing
Sliding blade
Sliding blade link shaft
Sliding blade link
Sliding blade
transmission shaft
Sliding blade spring
Sliding blade
spacer spring
Cutter worm gear
Autocutter deceleration shaft
Cutter plate cover
Movable blade drive shaft
Cutter drive gear
Cutter drive gear shaft
Micro switch
Cutter motor shaft
Cutter motor
Cutter lead wire
Cutter clutch spring
(omit an illustration)
Clutch
Autocutter deceleration gear
Cutter frame
Scissors blade
spacer
Sliding blade shaft