1. The I/D unit driving and up-and-down movements are effected by a single-pulse motor. The running of the main motor in the arrow direction (a) turns the lever

1 to the left. Then, the lever 2 that was lifted by the lever 1 lowers to move down the I/D unit. After the up/ down sensor is turned off (Figure 2-9-d), specified

downward pulsing places the I/D unit

in its lowest position, or equivalently, printing position (Figures 2-9-a and 2-9-c). The drum gear engages with the driving gear and starts revolving to transfer an

image on the drum to running paper, where the one-way gear idles upon placement of the lever in its lowest position.

2. With the running of the main motor in the arrow direction (b), the lever 1 pushes up the I/ D unit via the lever 2. After the up/down sensor is activated (Figure

2-9-d), the lever 1 lifts the I/D unit to a specified level and stops to keep space to an extent between the drum and the transport belt (Figures 2-9-c and 2-9-e).

The drum gear is not engaged with the driving gear and does not revolve.

3. When the two pins of the up/down sensor are pushed up by the I/D unit, and touches and electrically connected to the plate above the pins, the sensor

recognizes the on state. When the two pins are pushed down by the I/D unit, and separated and insulated from the plate, the sensor recognizes the off state. The

installation of the I/D unit can also be verified by recognizing the off state of the up/down sensor.

Table of Contents