Epson DFX-8500 service manual 1 M-3I60 Printer Mechanism, 25. M-3I60 Printer Mechanism

DFX-8500

1.5.1 M-3I60 Printer Mechanism

The M-3I60 printer mechanism is a 18-pin (9-pin two lows), serial impact dot matrix printer mechanism developed for the DFX-8500. It is designed to provide high-speed, high-volume printing, and is especially heavy and durable when compared with existing terminal printer mechanisms, Its paper feeding mechanism uses several kinds of fan-fold paper, and an automatic mechanism is included to provide enhanced paper handling.

The structural differences between the DFX-8500 and the DFX-8000 are:

‰￿ DFX-8500 includes a CR motor isolation resistance sensor. ‰￿ DFX-8500 includes a paper jam sensor.

‰￿ DFX-8500 includes a ribbon jam sensor.

‰￿ To prevent paper jams, the DFX-8500 includes a tractor wire at the front and rear tractors. ‰￿ The detection method of the carriage encoder sensor has been changed. In the DFX-8000, the

encoder plate was attached to the rotor of the CR motor, while the DFX-8500 uses a belt-type encoder.

‰￿ DFX-8500 does not include a carriage home position sensor.

Figure 1-25. M-3I60 Printer Mechanism

1-38 Rev. B