Epson Stylus Pro 9000 Service Manual - Page 28
Paper Feed Mechanism, Paper Feed Motor and Rollers,
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EPSON Stylus Pro 9000 2.2.2 Paper Feed Mechanism The main components of the paper feed mechanism are described below. PAPER FEED MOTOR AND ROLLERS When paper is loaded, it's held against the Paper Feed Roller by the Paper Pressure Rollers. Raising the Paper Release Lever (see Figure 2-10) moves the Paper Pressure Rollers away from the Paper Feed Roller, and releases any loaded paper. The Paper Feed Roller Assembly is made up of three equal lengths of rollers and their coupling. The PF Motor uses a DC motor, which has a built-in optical rotary encoder. The encoder sends signals to the software servo system, which regulates the speed of the motor. Motion is transferred through a timing belt to the SpeedReduction Gear, which improves the accuracy of paper feeding. CR Guide Rail Paper Pressure Roller Paper Feed Roller SpeedReduction Gear Platen Subplaten Paper PF Motor Figure 2-9. Paper Feed Mechanism Technical Overview 28