EPSON Stylus Color 900

Revision C

2.2.5 Pump/ASF Switch Mechanism

The pump/ASF switch mechanism switches the motor’s torque between the paper-loading and the pump-system sides. The pump/ASF motor supplies torque, and a solenoid is used as switching trigger. (Refer to Section 2.2.3 for the pump/ASF motor specifications.) Figure 2-6 shows how the pump/ASF mechanism works when switching to the ASF gear train.

Figure 2-6 shows the gear condition after switching to the ASF is completed. The steps below describe how the gears move to switch from pump gear train to the ASF gear train.

1.In the pump gear train condition, the gear (3) in the planetary gear set and the pump transmission gear are in mesh.

2.The pump/ASF motor rotates in the normal direction (CW).

[Switching to the ASF gear train]

3.

The whole planetary gear set tries to move up, but the solenoid

 

suppresses it.

 

 

 

4.

The solenoid comes on, allowing the whole planetary gear set to

Re d u c t io n moveg upe. aAt thisr point, the gear (3) does not rotate, but the motor pinion gear and gear (2) rotate in mesh.

A S F t r a n s m is s io n g e a r

5.

P la n e t a r y

Theg gears (3)r ands(4)ecomet in mesh and connection to the ASF gear train is fixed when a corner of the solenoid is aligned with the notch

in the planetary gear set.

P u m p / A S F m o t o r

6.Then the gears (4) and (5) are meshed. The gear (5) is connected to the ASF drive gear in the printer mechanism to rotate the roller in the ASF reverse (for paper return mechanism). (Refer to Section 2.2.3 for the paper return mechanism.)

S o le n o id

P u m p t r a n s m is s io n g e a r

Figure 2-6. Switching Operation to the ASF Gear Train

Operating Principles

Printer Mechanism Operating Principles

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Epson SEIJ98006 manual Pump/ASF Switch Mechanism, Switching to the ASF gear train

SEIJ98006 specifications

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