6 - 2
CZ80 / CV860 Rev. .0
CHAPTER 6: PRESS SECTION
MECHANISM
1. Press Mechanism
At the start of the printing job, when the START button is pressed, the Main motor activates to rotate
the Drum and also to feed the paper. When the Paper sensor detects the paper coming in and as the
Clamp plate base assembly comes near the Pressure roller, the Pressure lever assembly is pushed
by the Pressure cam. The Solenoid lever is then disengaged from the Pressure lever assembly. The
Pressure solenoid is activated ON and pulls the Solenoid lever down, away from the Pressure lever
assembly.
The Pressure lever assembly is pulled by the Pressure spring and that rotates the Pressure shaft in
the counter-clockwise direction (looking from the back of the machine) to lift the Pressure roller up.
The Pressure roller then pushed against the Drum.
During the printing, as the Clamp plate on the Drum rotates to the Pressure roller, the Pressure cam
pushes against the Pressure lever to bring the pressure roller down. This is to prevent the Clamp
plate from hitting against the Pressure roller.
The Pressure solenoid stays activated ON all through the printing job to keep the Solenoid lever
down, away from the Pressure lever assembly.
The Pressure solenoid turns OFF only when the Paper sensor no longer detects the paper coming,
such as at the end of a printing job or when paper jamming occurs.
(1) Lifting the Pressure roller
The Pressure solenoid is activated throughout the printing.
The solenoid pulls the Solenoid lever down and disengages Pressure lever assembly from the
Solenoid lever. The pressure spring pulls back the Pressure lever assembly and rotates the Pressure
shaft which is acting as a pivot.
The rotation of the Pressure shaft lifts the Pressure roller up against the Drum.
(2) Lowering the Pressure roller
The Pressure roller is lowered by force, away from the Drum, by the high part of the Pressure can.
During the Drum rotation, when the Clamp plate of the drum comes close to the Pressure roller, the
high part of the Pressure cam pushes the Pressure lever assembly down, rotating the Pressure shaft
clockwise to bring the Pressure roller down, away from the Drum.
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