Epson TM-T88II Series Manual de Instruções descarregar pdf (Página 45)

2-6 Mechanisms and Operation Rev. A

Closing the frame cover causes the top of the heat shield to come into contact with the platen as

shown in Figure 2.4.4. The thermal head separates from the stopper in the direction of arrow (3),

and the thermal head tip comes into contact with the platen.

The pressure being applied to the platen by the thermal head acts as downward force on the

frame cover, and the platen is fixed in the positioning slot in the main frame. At this time, the

slots that support the thermal head bearings open in the direction of the back of the head, so the

thermal head can move along the platen applying constant pressure along the print line.

Paper feed operation

Opening the frame cover, installing roll paper, and re-closing the frame cover causes the roll

paper to be sandwiched between the thermal head and platen. When the platen is rotated by the

power of the motor, friction generated between the platen and the paper feeds the roll paper in

the direction of arrow (3). This printer uses one of three print feed speeds, depending on the

print pattern. 2-2 phase drive for high-speed printing, and 1-2 phase drive for medium- and

slow-speed printing maintains torque while suppressing motor heat generation.

Figure 2.4.4 Platen and thermal head contact

Figure 2.4.5 Paper feed mechanism

Radiation plate

Platen

Cover, frame

Head tip

Paper guide

Spring, head holding

Thermal head

Paper feed direction

Cover, frame

Platen

Roll paper

Paper guide

Paper

Spring,

Plate, head holding

head

holding

sensor

(paper

end)

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Epson TM-T88II Series Manual de Instruções Página 45