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Paper Feeding Mechanism
The paper feeding mechanism has ordinary feed, fast feed. Paper is fed by the sprocket shaft using the sprocket
transmission gear driven by the paper feeding motor and the sprocket driving gear. Paper is fed by pulling the paper
up with the sprocket pins. The drive method for the paper feeding motor is the same as the carriage motor rnoves
the carriage from right to left.
The
printing position on the paper can be adjusted with a knob, but the adjustable minimum width is about 0.5mm
because of the resolution precision of the pulse motor .
..::.....::-------Paper
Sprocket drive gear
Sprocket transmission gear
Paper feeding motor
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Ribbon Feeding Mechanism
The ribbon mechanism consists of the cartridge ribbon and ribbon feeding mechanism. The ribbon feeding me-
chanism is attached to the belt tension plate assembly. Movement of the timing belt to the right and left is through
the following arrangement of wheels. The ribbon driving gear normally turns counterclockwise.
Carriage movement
Arrangement of wheels
1
Left --* Right
• Belt driven pulley --* Planetary pinion ( 1) --*
(In direction of arrow-+)
Planetary pinion (2) --* Ribbon driving gear
Right --* Left
• Belt driven pulley --* Planetary pinion (1) --*
2.
Planetary pinion (3)--* Planetary pinion (4)--*
(In direction of arrow
~)
Ribbon driving gear
L _ _ _ _
The ink ribbon is stored endlessly in the cartridge case. This ink ribbon, pinched between the ribbon feeding knob
and ribbon pressure roller, is wound UJ3 by the ribbon feeding knob set on the ribbon driving gear.
Furthermore, there is a ribbon braking spring at the outlet of the cartridge case to. prevent the ribbon from becoming
loose as it is wound. A ribbon mask is attached to prevent the paper from becoming dirty.
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