Riso V8000 Series Technical Manual Download

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[9 - 7]

CHAPTER 9. VERTICAL PRINT POSITION SECTION

Adjustment

Adjusting the Datum Print Position (Phase Between Print Drum
and Paper Drum)

This adjustment is to input the memory of the print position on each print drum for maximum of six print
drum positions (print drum positions 1 and 2 location for each machine, for maximum of three machines).

Preparations before the adjustment

(1) If there are more than one machine (maximum 3 machines) at an installation site, start up test

mode No. 686 and register each machine with numbers starting with “0”.

For maximum of three machines, the machines will be registered as “0”, “1”, and “3”.

If there is only one machine, the default setting for that machine is “0” from the start, so there
is no need to run test mode No.686.

(2) If the vertical center position adjustment on the machine (test mode No.680) is changed from

the default setting of “0” to another setting in the past, return the test mode No. 680 setting back
to “0” on all the machines to which the datum print position adjustment on the print drum(s) is to
be made.

Checking and Adjustment Procedure

(3)

Install the print drum(s) to be adjusted. Two print drums at one time or only one print drum at
one time can be installed for the adjustment.

(4)

Make confidential master on the print drum(s).

(5)

Using a scale, preferably of a flexible material, make a mark on the master on the print drum(s)
at a point 85 mm from the tip of the clamp plate.

(6)

Run prints (print speed: 3, print position: center) and check that the line(s) is printed 10 mm ± 1
mm from the leading edge of the print paper.

(7) If the line(s) is not printed within the given distance from the leading edge of the paper, rum test

mode No.681 (vertical center position adjustment on the print drum) for the print drum(s) on
which the line was not printed within the given distance.

Increasing the value by test mode No.681 will bring the image up.

(8)

Above adjustment should be made on all print drums for all the possible print drum positions
the print drums will be inserted in all the machines at one installation site (maximum three
machines).

Symptoms if incorrectly adjusted

The print position may vary on each print drum when the print drum position is changed for that print
drum on the machine(s).

< Example of the adjustment >

Example 1:

One machine, two print drums

(1)

Install the two print drums in the machine and follow the above instructions from (3) to (7).

(2)

Interchange the positions of the two print drums in the machine and follow above instructions
(6) and (7).

Example 2:

One machine, more than two print drums

(1)

Follow the steps given on “Example 1” for the first two print drums, and then repeat the same
procedure for all other remaining print drums.

Example 3:

Three machines, more than two print drums

(1)

First, number each machines by using test mode No. 686 , starting with “0” on the first machine
as stated on the top of the page. The second machine will be “1”, and third machine will be “2”.

(2)

Follow the steps given on “Example 2” for all the print drums which will be shared by the three
machines.