Epson Stylus Color 1160 - Paper Loading Mechanism

EPSON Stylus COLOR 860/1160 Revision C
Operating Principles Overview 36
2.1.1.7 Paper Loading Mechanism
The paper loading mechanism loads paper at the ASF unit and feeds paper to
the PF rollers. The ASF unit, the same as in the Stylus COLOR 440/640/740,
uses a 4-phase 48-pole PM type stepping motor for the ASF/Pump motor.
Drive sent from this motor is switched between the ASF unit side and pump
unit by the disengage mechanism. See Figure 2-6 for the ASF/Pump motor
specifications.
Table 2-6. ASF/Pump Motor Specifications
The rotational directions and their functions are shown in the table below:
Table 2-7. ASF/Pump Motor Rotation
Torque from the ASF/Pump motor is transmitted to the ASF as described
below:
o Torque transmission to the ASF unit
1) When the CR unit moves to the right end of the CR shaft, the DE lock lever
is pushed to the right end.
2) The ASF-Pump motor rotates clockwise specified steps (viewed from the
motor pinion gear side).
3) With the rotation of step 2), the planetary gear set in the disengage unit
shifts to the combination gear (12, 22.4) side.
4) The CR unit moves specified steps from the right end of the CR shaft to the
left. With this movement, the DE lock lever fixes the planetary gear unit.
5) Torque from the ASF/Pump motor is transmitted as described below.
Motor pinion gear → Planetary gear (15.2) → Combination gear (12,
22.4)
→ Combination gear (14, 28) → Spur gear (32) in ASF
Figure 2-9 shows the disengage mechanism and the parts involved.
Figure 2-9. Disengage Mechanism
Items Description
Motor type 4 Phase/ 48-pole /PM type pulse motor
Drive method Bipolar drive
Drive voltage +42V +/- 5% (DRV IC voltage)
Coil Resistance 10.4 ohm +/- 10%
Drive frequency [Hz] 15mH
Control method A3958
Directions Corresponding Functions
Clockwise
• Sets the paper return lever.
• Switches torque to the ASF side.
Counterclockwise
• Loads paper at ASF.
C om bination G ear 17.19,25.6
Planetary gear 15.2 unit
C om bination G ear 12,22.4
C om bination G ear 14,28
D E Lock Lever
P in io n fo r
AS F/Pum p M otor
A
: Paper loading rotation
: A S F s id e s w itc h ro ta tio n