)
STYLUS 800 Service Manual Operating Principles
2.2.3 Paper Feed Mechanism
This printer’s paper feed mechanism can feed paper either from the built-in ASF (auto sheet feeder)
or the manual feed slot. The paper feed drive motor is a 4-phase,
4t3-pole,
PM-type stepping motor
that directly drives the paper feed mechanism (paper advancing operation, paper pick-up
operation). This motor also drives the pump mechanism,
but only when the printer is in the
cleaning state.
Table 2-3. Paper Feed Drive Motor Specification
Item
Description
Motor Type
4-phase / 48-pole PM-type stepping motor
Drive Voltage
35 V
+
10% (31.5 - 38.5
V)
Coil Resistance
54
~
3 Q/ pole (at 25° C, 77° F)
Drive Frequency
650-800
ppS
Excitation Mode 2-2 phase excitation
Figure 2-6. Paper Feed Mechanism
Rev.
A
2-5