Ink Ribbon Cassette Drive Mechanism; Paper Thickness Selection - Panasonic KX-P1180 Service Manual

KX-P1180
Rack Gear (F) Hub Ribbon Drive Gear ©
Fig.1 (Bottom View)
Q Neutral Gear (A)
Ribbon Drive Gear ©)
Rack Gear ©) Hub
Fig.2 (Bottom View)
Head Gap Lever
Printhead
Platen
Head Nose (>)
Eccentric Cam
Shaft
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 regard-
less of the direction of the carriage movement. It
consists of the rack gear () , ribbon drive gear ©)
with the ribbon feed hub and 3 gears.
When the carriage moves to the right (Fig.1), rack
gear © turns the neutral gear@ counter-ciockwise,
and then neutral gear (@) engages with gear ©) via
the gear © which turns the ribbon drive gear ©
clockwise with the hub.
When the carriage moves to the left (Fig.2), rack
gear © turns neutral gear ® clockwise, and then
neutral gear (@) engages with gear which turns
ribbon drive gear €) clockwise with the hub.
6.2 Paper Thickness Selection
Selection for the number of copies is made by chang-
ing the distance between the platen and the print-
head nose tip. When the head gap lever is operated,
the eccentric cam shaft revolves, moving the car-
riage forward or backward.