Ribbon Feeding - Casio UP-250 Technical Manual

Ribbon feeding

When the carriage motor rotates forward and the carriage motor gear rotates in the direction of arrow A,
the ribbon intermediate gear and ribbon drive gear rotate in the directions of arrows B and C, respectively.
This causes the ribbon drive plate to move in the direction of arrow D, with the ribbon intermediate gear
shaft in the center, until the ribbon drive gear engages the ribbon transmission gear.
Since the ribbon transmission gear and the ribbon take-up gear are always engaged, the ribbon take-up
gear rotates in the direction of arrow E.
When the carriage motor rotates in the reverse direction and the carriage motor gear rotates in the
direction of arrow F, the ribbon drive plate moves in the direction of arrow G, disengaging the ribbon
drive gear from the ribbon transmission gear.
Therefore, the ribbon take-up assembly rotates in the direction of arrow E only when the carriage motor
rotates forward. Then the ribbon feed and ribbon hold rollers in the ribbon cassette, which are engaged
with the ribbon take-up assembly, rotate and the ribbon is fed.
Ribbon drive
gear
F
B
C
G
Ribbon drive
plate
Ribbon transmission gear
Figure 2-10 Ribbon feeding
— 33 —
Carriage motor gear
A
Ribbon intermediate gear
Ribbon feed roller
Ribbon take-up
assembly
D
Ribbon take-up
gear
E