Riso V8000 Series, Техническое руководство, Страница: 130 / 362

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CHAPTER 8. PRINT DRUM SECTION
6. Ink Cartridge Set Mechanism
Black and color ink have different cartridge SW PCBs.
Black ink: 3 sensors. Color ink: 3 sensors.
The sensors check that the correct ink cartridges are inserted. Ink cartridge set switches 1 to 3 check
whether the ink cartridges matching the print drum are in placed in the printing drums. If none of the ink
cartridge set switches are pressed, “Install ink cartridge” is displayed; if incorrect cartridges are set,
“Wrong type cartridge” is displayed.
7. Ink Supply System Mechanism
Inking is performed separately for each print drum.
No ink detection
Inking is performed if the ink sensor remains continuously OFF for a preset duration.
Ink overflow detection process
If the overflow sensor is continuously ON for a preset period of time, an overflow error message is
given, and the printing operation is stopped.
8. Inner Pressure Mechanism
Inner pressure roller drive mechanism
The main motor rotates the inner pressure roller via the drive mechanism => drive joint =>
engagement pin => flange drive gear => flange gear => gear (Z38) => gear (Z31) => gear (Z40) =>
inner pressure drive gear.
Inner pressure roller vertical movement mechanism
The inner pressure roller is lifted up or pushed down during printing by switching the inner pressure
clutch ON for 50 ms.
The inner pressure roller can be pushed down when the 2nd paper feed sensor is ON after the start of
the printing.
The inner pressure clutch is switched ON at paper drum angle 250° from the position T for the 1st
print drum and at 340° from position T for the 2nd print drum. When switching OFF the inner pressure
clutch, the paper drum is at 310° from position T for the 1st print drum and at 400° from position T for
the 2nd print drum.
The inner pressure detection sensor confirms that the inner pressure roller is at the lowered or raised
position.
Inner pressure roller pressure regulation system
The printing pressure of the inner pressure roller on the paper drum is adjusted by the pressure
control motor. The print pressure datum position is checked by the print pressure sensor. The print
pressure limit sensor (encoder sensor) checks the rotation of the pressure control motor.