Riso RZ5 Series, Technical Manual, Page: 118 / 410

RISO Inc. Technical Services & Support US.RISO.COM
CHAPTER 8: PRINT DRUM SECTION
[ 8 - 30 ]
< Adjustment in the REAR >
(3) Remove the print drum from the machine.
(4) Looking at the rear of the print drum, find two securing screws of the squeegee side frame-R (indicated by
the arrow marks on the photograph) and loosen the two screws.
(5) Insert a flat-head screwdriver through the opening on the drum rear frame assembly, rotate the squeegee-
gap cam until correct gap is obtained between the squeegee roller and drum body.
(6) Tighten the two securing screws on the on the squeegee side frame-R to finish the adjustment on the rear
side of the print drum.
Drum rear frame assembly
Flange-R
Squeegee gap cam
Symptoms
(1) Difference in the squeegee pressure between the front and rear of the print drum will result in uneven
density between the right and left of the prints.
(2) If the squeegee pressure is too strong (the gap too small), too much ink is transferred onto the inner
surface of the print drum and may result in ink leakage from the print drum. Other problems, such as the
master slipping out from the clamp plate and horizontal line images may start to rip on the master.
(3) If the squeegee pressure is too weak (the gap too large), not enough ink is transferred onto the inner
surface of the print drum and may cause the images on the prints to be too light or images missing from the
prints due to lack of ink on the drum surface, and more than necessary quantity of prints may have to be
printed before the image transfers completely on the paper.
0873
0874
< REAR >