EPSON Stylus COLOR 3000
EPSON Stylus Color 3000 Service Manual
-5
Paper Feed Mechanism
The paper feed mechanism of this printer consists of the ASF, tractor, PF (Paper Feed) motor, front/rear PE
(Paper End) sensors, PF roller, paper guide mechanism, paper eject mechanism, and PF motor drive
disengage mechanism. The PF motor drives the ASF and tractor mechanisms, PF roller, and paper eject
mechanism. When the printer is not printing, the PF motor drive disengage mechanism detects the CR
position and engages the gear for the ASF mechanism. While the paper feed mechanism is active, the PF
motor engages the PF motor pinion and disengage gears to turn the PF roller. The PF roller drives the paper
eject mechanism via the gear train in the paper guide mechanism and also drives the ASF when the
transmission gear is engaged. The tractor drive gear train is at the left end of the PF roller. Table 2-3 and
Table 2-4 show specifications for the PF motor and PF motor control variables, respectively. Figure 2-5
illustrates the paper feed mechanism.
Item Description
Motor type 4-phases / 96-pole / Hybrid-type stepper motor
Drive voltage
42 VDC ± 5% (Applied to the driver)
Coil resistance
10 Ω ± 10% (at 25° C per 1 phase)
Connection Bipolar
Excitation mode 2-2 phase, 1-2 phase, W1-2 phase constant current drive
Minimum step 1/720 inch / step (2-2 phase drive)
Operation
mode
Acceleration Constant Deceleration Stand-by
Paper feed
(Line feed: 1/6 inch)
0.9/0.9 0.9 0.75/0.75 0.6
ASF Feed 0.9/0.9 0.9 0.75/0.75 0.6
Pump driven
/0.9
0.9 0.9 0.6
Pump driven
(slow)
/
0.9
/
0.6
Note: Double 1-2 phase drive / 2-2 phase drive
Table 2-3. PF Motor Specification
Table 2-4. PF Motor Control Variables
Tractor Disengage Gear
To the tractor.
To the ASF.
PF Roller
ASF Transmission Gear
Paper Eject Roller
Paper Eject Out Roller
Paper Eject Mechanism
PF Motor Pinion Gear
PF Motor
Figure 2-5. Paper Feed Mechanism