Jogging / Offset Mechanism; Jogging Sequence; Offsetting Sequence; Detection Of Fixed Position - Lexmark C920 Service Manual

5056-XXX

Jogging / offset mechanism

Jogging sequence

Each sheet, upon entering the accumulator, is aligned by the jogging bar which moves the sheet horizontally
until the edge of the sheet contacts the registration plate. The paper detecting sensor detects the paper position
for stapling.

Offsetting sequence

Sheets of jogged paper are offset by the horizontal movement of the jogging bar. The jogging bar is moved
horizontally by the rack and pinion mechanism, while the jogging motor rotates. Each plate spring on the jogging
bar pushes the rack in the direction of the pinion gear, so that the rack and pinion gears meet securely. The
distance of the offset bar movement depends on paper size, A4 or letter.

Detection of fixed position

The fixed position of the jogging bar is detected by the jogging home position sensor and a sensor flag united
with the pinion. The fixed position is set when the sensor detects the sensor flag. This fixed position is used as a
reference point to calculate the distance of the movement of the jogging bar and offset bar depending on paper
size.
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Diagnostic aids