Chapter 2 Periodic Inspection
2. Checking the Plate Pressure and Impression Pressure
When the printing image becomes texture grained
or
white out occurs, the cause
is
poor printing pressure (plate pressure
and impression pressure). Follow the procedures below.
Standard nip width
(nun) (inch)
Pressure between the blanket cylinder and plate
5.5-6.0
(Note) The nip width given
on
the left is
when using the RYOBI blanket and
under blanket.
cylinder (Plate pressure)
(0.22 - 0.24")
Pressure
between
the
blanket
cylinder
and
6.5-7.0
impression cylinder (Impression pressure) (0.26 - 0.28")
Checking procedures
----------------------------,
1.
Align
the
plate pressure adjust-
ment scale to the thickness
of
the
plate.
4. Shift
the
metering roller release
lever
in
the direction
of
the arrow
(
~
position)
to
release
the
metering
roller from the water
fountain roller.
2.
Align
the impression pressure
adjustment dial to the thickness
of
the paper.
5. Set the water form roller release
lever (
1)
at the It] position.
UNIT
3. Push the unit selection button
of
the checking unit.
CYCLE
SET
6.
Set
the cycle set button
on
the
delivery section auxiliary switch
panel to the cycle "9".
(Note)
After
completing
the
checking, return it to the
cycle "0".
Maintenance Edition-
21
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