Epson SEIJ98006 9. Ink Absorption Process, EPSON Stylus Color, Revision C, Operating Principles

EPSON Stylus Color 900 Revision C

The steps below explain the process of driving each mechanism.

1.The precondition for driving the pump, carriage lock, and head cleaner is that the pump/ASF switch mechanism is switched to the pump gear train. (Refer to Section 2.2.6.)

2.Drive from the pump/ASF motor is transmitted via:

1) pump transmission gear (black) → 2) pump intermittent gear (black) → 3) pressure roller (right) (pump drive roller: flesh color)

3.Along the way, the drive is also transmitted to the carriage lock lever. The carriage lock lever is released with normal rotation of the pump/ASF motor and set with reverse rotation of the motor.

4.Once the drive is transmitted to the pressure roller (right), all parts used to drive the pump begin to act. The Stylus Color 900 has the right and left pressure rollers. However, since the black and color heads are included in one unit, the absorption tube is split in the middle so the 2 pumps can absorb ink in the printhead. See Figure 2-9 which explains the ink absorption process.

5.The cleaner head is located between the pump frame and the cleaner head drive roller, and a compression spring is set between the cleaner head and the cleaner drive roller. Since the cleaner head has a protrusion (marked with a red circle in Figure 2-8) on it on the roller side, it moves back and forth along with the roller rotation. However, if the roller rotates faster than the specific level, it rotates alone because tension of the compression spring does not work any more.

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Figure 2-9. Ink Absorption Process

Operating Principles Printer Mechanism Operating Principles 55