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Neutral Gear @)
CO.
Si
cert
ate a
Rack Gear (®
Fig.2 (Bottom View)
Head Gap Lever
Printhead Nose
Platen
Eccentric Cam
6.1.4 Ink Ribbon Cassette Drive Mechanism
This function performs the ribbon feed operation in
accordance with the movement of the carriage. The
ink ribbon cassette drive mechanism
is shown in
Figures 1 and 2.
This
mechanism
gives
uniform
ribbon
feed
regardless of the direction of the carriage movement.
It consists of the rack gear
, ribbon drive gear ©
with the ribbon feed hub and 5 gears.
When the carriage moves to the right (Fig.1), rack
gear (F) turns neutral gear @) counter-clockwise,
and then neutral gear (@) engages with gear (© via
gear©), @ and ©@ which turns the ribbon drive
gear © clockwise with the hub.
When the Carriage moves to the left (Fig.2), rack
gear (F) turns the neutral gear @) clockwise.
Gear
) then engages ribbon drive gear
which turns
the hub clockwise.
6.2 Paper Thickness Selection
Selection for the number of copies is made by .
changing the distance between the platen and the
printhead nose tip. When the head gap lever is
operated the carriage shaft revolves on the eccentric
cams, moving the carriage forward or backward.
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