8 - 7
CZ80 / CV860 Rev. .0
CHAPTER 8: PRINT DRUM
2. Squeegee Gap Adjustment
1) Remove the Drum out of the machine, and remove the Screen and Drum body from the Drum.
2) Clean out all the ink off the Squeegee unit.
3) Using a feeler gauge, check and confirm that the gap between the Squeegee roller and Doctor
roller is 0.08mm plus/minus 0.02mm.
The gap should be equal in the front and rear.
4) If the gap is out of the above range, make adjustment by loosening the screw on the Doctor roller
adjustment plate.
5) Insert an Allen wrench in the hole of the Doctor roller adjustment plate and gently swing the plate
until correct gap is obtained.
6) Tighten the screws.
Results of incorrect adjustment
1) If the gap is too big, too much ink is supplied onto the inner surface of the Drum. This will cause
the master on the Drum to slip and cause the master to come loose from the Clamp plate too
quickly.
2) If the gap is too small, not enough ink is transferred onto the inner surface of the Drum. This will
cause light prints to come out in the beginning of a print job.
3. Ink blocking plate position adjustment
ADJUSTMENT
(FRONT)
1) Remove the Drum out of the machine, and remove following parts.
Drum cover
Grip handle
2) From a hole on the front Drum support, loosen the screw of the Ink blocking plate F.
3) Insert tip of a flat-head screw driver in the slit of the Ink blocking plate F. Then move the Ink
blocking plate F until it hits against the inner surface of the Drum. Then tighten the screw.
(REAR)
1) Remove the Drum out of the machine. From the hole on the rear Drum support, loosen the screw
of the Ink blocking plate R.
3) Insert tip of a flat-head screw driver in the slit of the Ink blocking plate R. Then move the Ink
blocking plate R until it hits against the inner surface of the Drum. Then tighten the screw.
Results of incorrect adjustment
1) If the Ink blocking plates are not firmly against the inner surface of the Drum, the Ink blocking
plate is not able to scrape the ink back into the Drum and will cause the ink to pool outside the
Squeegee roller. The ink will eventually leak out from the Drum.
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