Power Transmission Mechanism; Structure Of The Gear Train - Brother FAX218 Service Manual

2.3

Power Transmission Mechanism

The equipment has a single drive motor whose power transmission route can be switched by
the planetary gear train and the solenoid. This switching allows the equipment to function in
four operation modes (recording, scanning, copying, and cutter driving modes).
2.3.1

Structure of the gear train

The gear train consists of two groups of gears: one group on the drive unit and the other on
the scanner frame ASSY. Mounting the drive unit onto the scanner frame ASSY makes
those two groups of gears engage with each other so that the rotation torque of the motor on
the drive unit is transmitted to the separation roller, white pressure roller, and platen.
Shown below are a group of gears, the motor and solenoid on the drive unit. The cutter gear
(Q) is integrated in the cutter flange (R) whose boss is placed in the hole provided in the
cutter's upper blade.
Spring
Clutch arm
Solenoid
C1 (Planet gear 20B)
Shown below is a group of gears on the scanner frame ASSY.
G (Gear 18L)
F (Gear 18)
E (Gear 14/20)
D (Gear 16)
J (Gear 20)
A (Motor gear)
B (Sun gear 18/82)
Drive Unit (viewed from the motor mounting side)
L (Separation roller gear)
Scanner Frame ASSY
K (Gear 16/24)
C2 (Planet gear 20A)
P (Gear 24)
M (Gear 23)
N (Flanged gear 23)
III – 5
Q (Cutter gear)
R (Cutter flange)
Boss of cutter flange
(Front)
Drive unit
O (White pressure roller gear)
I (Reverse gear)
H (Platen gear)
(Front)
Scanner frame ASSY