Operating Principles STYLUS 800 Service Manual
2.2.2 Carriage Drive Mechanism
The timing belt attached
to
the base of the carriage unit is driven by the carriage motor, causing the
carriage unit to
move
along
the
carriage
guide shaft left to right, or vice versa. The carriage
drive
motor on this printer
is
a 4-phase, 200-pole, hybrid-type stepping
motor mechanism, allowing the
printer to stop the carriage or change the carriage movement at any position. The position of the
carriage is recognized by the home position sensor and position information is fed back to the
carriage drive control circuit to determine the motor phase switching mode.
Table 2-1. Carriage Drive Motor Specifications
Item
I
Description
I
Motor Type 4-phase
/
200-pole hybrid-type stepping motor
Drive Voltage
35 V
f
10Yo (31.5 -38.5 V)
Coil Resistance
10.0
Qt
7%/ pole (at 25° C, 77°
F)
Drive Frequency
960
-5400 pps
Excitation Mode 1-2 phase excitation
Figure 2-4. Carriage Drive Mechanism
2.2.2.1 Platen Gap Adjust Lever
Set the platen gap adjust lever, attached to the carriage unit, to an appropriate position for the
paper thickness used for printing.
Table 2-2. Platen Gap Adjust Lever Position
Paper Type Lever Position Platen Gap
Cut sheet Horizontal (A)
—
Envelope Vertical (B)
+0.7 mm
Plain paper, Bond paper
Envelope
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Figure 2-5. Platen Gap Adjust Lever
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