Epson DFX-9000 - Auto Paper Feed

Epson DFX-9000 Revision B
Operating Principles Printer mechanism 68
2.2.4.3 Auto paper feed
Once set onto the tractors, paper is loaded into the mechanism using the
control panel. Press the [LL/LF Load] button and the carriage moves to
the center. The LF motor then drives the paper feed mechanism to feed
the paper. The paper is directed by the Card Guide on the CARRIER
UNIT, and stops at a position detected by the reflective TOFS sensor on
the Card guide.
Figure 2-11. Auto paper feed
Tractor feed mechanism error detection
An error in the tractor feed mechanism is detected by the PF driver
(Fatal error: PF driver error) under the following conditions:
 When a damaged LF motor, or defective LF motor driver, causes an
abnormal electric current.
 When a single phase of the LF motor is energized for longer than the
allowable time.
The +42 V power supply is shut off by hardware when this error is
detected.
There is no circuit to detect LF motor rotations, so there is no out-of-step
error detection for the LF motor.
CARRIER
UNIT
1st Nip Roller
Reflective TOFS Sensor
Card Guide
Platen
DV
Roller F