Riso V8000 Series, Техническое руководство, Страница: 240 / 362

[14 - 2]
CHAPTER 14. MASTER MAKING SECTION
Mechanism
1. Basic Construction of the Master Making Section
The flat bed set SW checks that the scanner table is in position, functioning as an interlock SW.
The master making unit sensor checks that the master making unit is in place. The master positioning
operation is performed once the master making unit is in position.
The master volume detection sensor checks the amount remaining on the master roll.
The master end sensor detects when the master roll is finished.
The master detection sensor checks that a master is present in the master making unit.
The master positioning sensor checks that a master is present in the standby position.
Manual master cutting is performed with the master cut SW.
* Master cut SW conditions: The scanner table must be open, the 2nd print drum must be removed, and
the master detection sensor must be on.
2. Master Making Unit Shifting Mechanism
This moves the master making unit for master making on the 1st and 2nd print drums.
The position of the master making unit is checked by master making position sensors 1 and 2, and the
master making unit is moved by the master making unit shifting motor.
The master making unit is initially positioned at the 2nd print drum position.
3. TPH Elevation Mechanism
The TPH is moved up and down by the thermal pressure motor, and the position is checked by the
thermal pressure sensor.
The TPH is initially at the TPH pressure release position.
TPH pressure release position: The position at which the thermal pressure sensor goes off when the
motor is rotated in the release direction.
TPH pressure applied position: The position at which the thermal pressure sensor goes off when the
motor is rotated in the pressure direction.
4. Master Set Mechanism
The master positioning operation is performed once the master making unit is opened and closed and
the master making unit switch is on.
With the TPH in the pressure applied position, the write pulse motor rotates in the feed direction, then
stops after feeding the master 2 mm from the position at which the master positioning sensor goes on.
If the master positioning sensor was initially on, the master is returned until the master positioning
sensor goes off. The master positioning operation is then performed.
Under normal conditions, the master positioning sensor should be in standby mode.
5. Master Loading
The master is fed
by the write pulse motor and master loading motor in the master making section.
Master loading relies on a “simultaneous loading” system, which simultaneously makes the master and
loads the master around the print drum.
For master loading, the print drum is rotated at super-low speed by the main pulse motor.