Epson 2200 Service Manual - Page 58
Ink System Mechanism - stylus photo head cleaning
UPC - 010343841840
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EPSON Stylus PHOTO 2100/2200 Revision B 2.2.5 Ink System Mechanism The Ink system mechanism consists of the Pump unit (including the Carriage lock lever) and Capping mechanism. The Cap unit is in close contact with the CR unit and drains ink from the Ink cartridge to Head cavities to Cap to Waste ink pad using the driving force of the Pump unit. 2.2.5.1 Pump Mechanism The Pump mechanism is designed to suck ink from the Printhead or Cap assembly. The Cap assembly has a built-in head cleaning wiper. The following gives the operation outline of the Pump mechanism. To provide the driving force of the Pump mechanism, a 4-phase, 48-pole PM type stepping motor is used as the ASF/Pump motor. For the specifications of the ASF/ Pump motor, refer to 2.2.3.1 Table 2-9 "ASF/Pump Motor Specifications". When the driving force of the ASF/Pump motor is switched to the Pump unit side by the DE mechanism, the functions of the Pump mechanism are as indicated in the following table depending on the rotation direction of the ASF/Pump motor. Table 2-14. ASF/Pump Motor Rotation Directions and Functions ASF/Pump Motor Rotation Direction*a Functions CW direction CCW direction Pump suction Wiper setting Pump release Wiper resetting *a: Pump rotation direction (Clockwise direction as viewed from the pump drive input gear is defined as forward rotation) The next section gives the path in which the driving force of the ASF/Pump motor is transmitted to the Pump mechanism. 2.2.5.2 Drive Transmission Path to Pump Unit 1. The Carriage unit moves to the right end of the Carriage guide shaft to move the DE lock lever to the right end. 2. The ASF/Pump motor rotates in the CW direction (as viewed from the motor pinion side) by the specified number of steps. 3. As the ASF/Pump motor rotates in the CW direction by the specified number of steps, the Planetary lever unit in the DE unit moves toward the Combination gear 17.19, 25.6. 4. As the CR unit moves leftward from the right end of the Carriage guide shaft by the specified number of steps, the DE lock lever fixes the Planetary lever unit in position. 5. The driving force of the ASF/Pump motor is transmitted in the following path. Motor pinion gear → Planetary lever unit → Combination gear 17.19, 25.6 → Tension belt → Combination gear 12, 29.92 → Spur gear 26.4 → Pump unit gear → Pump unit The following shows the part names and operation outline of the DE mechanism. Combination gear 14, 28 Planetary lever unit DE lock lever Tension belt Combination gear Pump unit gear 12. 29,92 Spur gear 26.4 Combination gear 12, 22.4 ASF/Pump motor pinion gear Combination gear 17.19, 25.6 Figure 2-13. DE Mechanism Outline OPERATING PRINCIPLES Printer Mechanism 58