Riso CV1860 Series, Техническое руководство, Страница: 36 / 243

3 - 3 CZ80 / CV860 Rev. .0
CHAPTER 3: MAIN DRIVE
3. Print Drum Positions
) The Print drum angle positions are checked by Position-A sensor and Main motor FG sensor.
2) The 0 degrees of the print drum is called the Position-A. One drum rotation from the Position-A
to the next Position-A equals to 360 degrees.
3) With the activation of the Position-A sensor, the Main motor FG sensor pulse count is reset and
from the pulse count of the Main motor FG sensor, the machine calculates the Print drum angle.
4) POSITION-A : The position-A of the print drum is when the Position-A sensor light path is
blocked by the sensor actuator.
5) POSITION-B : The position-B of the print drum is 270 degrees rotation from the position-A,
calculated by the Main motor FG sensor.
This is the position where the Print drum is pulled out or pushed into the machine.
4. Print Drum Locking Mechanism
) The Print drum is designed to unlock only when it is at Position-B.
2) At any other Drum positions, the flange around the Drum main gear prevents the Intermediate
gear from disengaging from the Drum main gear.
3) Only when the Print drum is at Position-B, the flange on the Drum main gear does not interfere
against the Intermediate gear, allowing the Print drum to be pulled out from the machine.
4) There are Eye-markings on both the Drum main gear and Intermediate gear and they meet only
when the Print drum is at Position-B.
5) For some reasons if the Intermediate gear is rotated manually with the Print drum out of the
machine, the Intermediate gear must be manually back so that the Eye-markings between the
Drum main gear and Intermediate gear meet with each other. the Print drum can be inserted
back into the machine when these Eye-markings meet with each other.
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