Riso V8000 Series, Technical Manual

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[10 - 6]
CHAPTER 10. CLAMP UNIT
6. Clamp Plate Movements
Tail clamp plate opening movement
(1) Clamp unit makes initial positioning movement.
(2) Clamp slide motor activates to engage clamp engaging shaft on the tail clamp plate shaft.
(3) The angular safety sensor checks whether the top clamp plate is correctly closed.
(4) Clamp opening and closing motor opens the tail clamp plate, and when the 0 angular sensor
detects the tail clamp opened, the clamp opening and closing motor stops after the duration of
time preset by test mode No. 597.
(5) The clamp unit goes through initial positioning movement.
Top clamp plate opening movement
(1) Clamp unit makes initial positioning movement.
(2) Clamp slide motor activates to engage clamp engaging shaft on the top clamp plate shaft.
(3) Clamp opening and closing motor opens the top clamp plate, and when the 180 angular sensor
detects the top clamp opened, the clamp opening and closing motor stops after the duration of
time preset by test mode No. 595.
(4) Clamp opening and closing motor activates again, this time in the direction to close the top
clamp plate, and stops when the clamp plate loading position sensor detection changes from
OFF to ON (This is the top clamp plate half-opened position for master removal.)
(5) 300 msec later the clamp opening and closing motor rotates in the direction to open the top
clamp plate, and when the 180 angular sensor detects the top clamp opened, the clamp
opening and closing motor stops after the duration of time set by test mode No. 595.
Above (4) and (5) will be skipped if “0” is selected by test mode No. 391 [master top release
repetition]. If “1” through “5” is selected by test mode No. 391, above (4) and (5) will be
repeated for the set repetition by test mode No. 391, and goes to next step (6).
(6) The clamp unit goes through initial positioning movement.
Top clamp plate closing movement
(1) Clamp unit makes initial positioning movement.
(2) Clamp slide motor activates to engage clamp engaging shaft on the top clamp plate shaft.
(3) Clamp opening and closing motor closes the top clamp plate, and stops when the clamp plate
loading position sensor detection changes from ON to OFF (This is the top clamp plate half-
opened position for master clamping.)
(4) Leading edge of the master material is transferred under the top clamp plate.
(5) Clamp opening and closing motor reactivates to continue closing the clamp plate and when the
0 angular sensor detects the top clamp closed, the clamp opening and closing motor stops
after the duration of time preset by test mode No. 596.
(6) The clamp unit goes through initial positioning movement.
Tail clamp plate closing movement
(1) Clamp unit makes initial positioning movement.
(2) Clamp slide motor activates to engage clamp engaging shaft on the tail clamp plate shaft.
(3) Clamp opening and closing motor closes the tail clamp plate, and stops when the clamp plate
HP sensor detection changes from OFF to ON.
(4) After 800 msec later the clamp opening and closing motor activates to close the tail clamp plate
further, and after 180 angular sensor detects the tail clamp plate closed, the clamp opening and
closing motor stops after the duration of time preset by test mode No. 598. (This movement
slides the tail clamp plate and tensions the master on the print drum.)
(5) The clamp unit goes through initial positioning movement.