Appendix D-30 Product Overview Rev.D
Confidential
This ribbon feed mechanism only feeds the ribbon when the head carriage assembly is moved
from the right side to the left side.
Figure D-38
Ribbon feed operation
When the carriage motor moves the head carriage assembly from the right side to the left side,
the carriage transmission pulley rotates in the direction indicated by arrow A in Figure D-39.
This driving force rotates the ribbon drive gear (planetary gear) in the direction indicated by
arrow B via the transmission gear and ribbon reduction gear. At this time, the ribbon drive plate
rotates in the direction indicated by arrow C around the ribbon reduction gear rotation shaft
until the ribbon drive gear meshes with the ribbon intermediate gear.
Meshing of these gears transmits the driving force of the ribbon drive gear to the ribbon take-up
gear via the ribbon intermediate gear, rotating the ribbon take-up shaft mounted at the top in the
direction shown by arrow D. (See Figure D-39.)
The ribbon is fed when the ribbon feed roller in the ribbon cassette meshes with this ribbon take-
up shaft.
On the other hand, when the head carriage assembly moves from left to right, the carriage
transmission pulley rotates in the direction of arrow E, and the ribbon drive plate rotates in the
direction of arrow F around the ribbon reduction gear rotation shaft. Consequently, the ribbon
drive gear and ribbon intermediate gear no longer mesh, the ribbon take-up gear remains in
place, and the ribbon is not fed.
Ribbon reduction gear
Transmission gear
Carriage transmission
pulley
Ribbon take-up shaft
Ribbon take-up gear
Ribbon intermediate gear
Ribbon drive gear
Head carriage set
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