Riso V8000 Series, Technical Manual

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[10 - 4]
CHAPTER 10. CLAMP UNIT
2. Print Drum Position-A Movement
The position A is determined by the position A detection plate blocking the position A sensor.
There are five position A for the print drums.
Position A of the tail clamp plate for the master removal (same for print drums No. 1 & No. 2)
(1) With the main motor, the print drum rotates at 30 rpm and stops when position A sensor
detection changes from OFF to ON.
(2) Main clutch is engaged to rotate the print drum in the reverse direction by the maim pulse motor.
(3) The main pulse motor stops when position A sensor detection changes from ON to OFF.
(4) 300 msec later, the main pulse motor rotates in the forward direction.
(5) When position A sensor detection changes from OFF to ON, the main pulse motor stops and
the main clutch is disengaged.
Position A of the top clamp plate for the master removal (same for print drums No. 1 & No. 2)
(1) Main clutch engages and main pulse motor rotates in the forward direction.
(2) The main pulse motor stops 800 msec after position A sensor detection changes from ON to
OFF.
(3) 300 msec later, the main pulse motor rotates the print drum in reverse direction.
(4) Main pulse motor stops and main clutch disengages at 5 mm circumference rotation of the print
drum from the time the position A sensor detection changes from OFF to ON.
Position A of the top clamp plate for the master loading (same for print drums No. 1 & No. 2)
(1) With the main motor, the print drum rotates at 30 rpm and stops when position A sensor
detection changes from OFF to ON.
(2) Main clutch is engaged to rotate the print drum in the forward direction by the maim pulse motor.
(3) The main pulse motor stops 800 msec after position A sensor detection changes from ON to
OFF.
(4) 300 msec later, the main pulse motor rotates the print drum in reverse direction.
(5) Main pulse motor stops and main clutch disengages at 5 mm circumference rotation of the print
drum from the time the position A sensor detection changes from OFF to ON.
Position A of the tail clamp plate after the master loading (for print drum No. 1 only)
(1) With the main motor, the print drum rotates at 30 rpm and decelerates to 10 rpm from paper
drum at T position.
(2) The main motor stops when the paper drum comes to 45 degrees from the T position.
(3) 100 msec later, the main clutch engages and the main pulse motor rotates the print drum in
forward direction.
(4) Main pulse motor stops and main clutch disengages when the position A sensor detection
changes from OFF to ON.
Position A of the tail clamp plate after the master loading (for print drum No. 2 only)
(1) With the main motor, the print drum rotates at 30 rpm and decelerates to 10 rpm after the paper
drum rotates 180 degrees from the T position.
(2) The main motor stops when the paper drum comes to 225 degrees from the T position.
(3) 100 msec later, the main clutch engages and the main pulse motor rotates the print drum in
forward direction.
(4) Main pulse motor stops and main clutch disengages when the position A sensor detection
changes from OFF to ON.