Rice Lake Okidata 320-390-420 Turbo - Service Guide - Manual (Page 39)

(2) Cut-sheet feeder operation (See Figure 2-9.)
The pulse motor used for the paper feed mechanism is mounted on the left of the frame, and the rotation
of the motor is transmitted through decelerating gears (LF idle gear, platen gear) to the platen. When
using cut-sheet paper, the change lever must be in the TOP position to grab the paper, while disengaging
the push tractor.
When the change lever is set to the TOP position, the paper is automatically fed in up to the print start
position after pausing for the wait time stored in the menu.
(3) Continuous paper feed operation (Rear) (See Figure 2-10.)
The force transmitted to the platen turns the tractor gear by means of the platen gear, the idler gear, and
the change gear. The rotation of the tractor gear turns the sheet feeder shaft, which moves the pin tractor
belt, feeding the paper.