Epson TM U200D - B/W Dot-matrix Printer, Техническое руководство

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2-8 Mechanism Configuration and Operating Principles Rev.B
Ribbon feeding
When the Motor, carriage rotates forward and the Gear, carriage motor rotates in the direction
of arrow A, the Gear, ribbon intermediate and Gear, ribbon drive rotate in the directions of
arrows B and C, respectively. This causes the Plate, ribbon drive to move in the direction of
arrow D, with the Gear, ribbon intermediate shaft in the center, until the Gear, ribbon drive
engages the Gear, ribbon transmission .
Since the Gear, ribbon transmission and the Gear, ribbon take-up are always engaged, the Gear,
ribbon take-up rotates in the direction of arrow E.
When the Motor, carriage rotates in the reverse direction and the Gear, carriage motor rotates in
the direction of arrow F, the Plate, ribbon drive moves in the direction of arrow G, disengaging
the Gear, ribbon drive from the Gear, ribbon transmission .
Therefore, the Ribbon take-up ass’y rotates in the direction of arrow E only when the Motor,
carriage rotates forward. Then the ribbon feed and ribbon hold rollers in the Ribbon cassette ,
which are engaged with the Ribbon take-up ass’y , rotate and the ribbon is fed.
Figure 2-10 Ribbon feeding
Gear, carriage motor
Gear, ribbon intermediate
Ribbon take-up
Gear, ribbon take-up
Gear, ribbon transmission
ass’y
Gear, ribbon drive
F
A
C
B
G
D
E