Riso V8000 Series, Technical Manual

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CHAPTER 14. MASTER MAKING SECTION
3. Write Start Position Adjustment
Checking and Adjustment Procedure for 1st Print Drum
Make a master using test mode No.50 on the 1st print drum and make few prints using one color.
(Print speed: 3, print density: 3, print position adjustment: center)
Measure the position of the printed image and confirm that the top edge of the image is 5 mm ± 0.5
mm from top of the print.
If the measured value falls outside the range of specifications, run Test mode No. 281 (Write Start
Position Adjustment) and adjust the write start position for the 1st print drum.
Increasing the setting on the test mode moves the write start position down, while decreasing the
setting moves the image up.
Checking and Adjustment Procedure for 2nd Print Drum Write Start Position relative to the 1st Print
Drum Position
Once the 1st print drum has been adjusted, make master on both the 1st and 2nd print drums using
test mode No. 51. Make few prints using two colors. (Print speed: 3, print density: 3, print position
adjustment: center)
Check that the difference between the first printed line at the top of the print on the 1st print drum and
2nd print drum is within 0.5 mm.
If the difference falls outside the range of specifications, run Test mode No. 281 (Write Start Position
Adjustment) and adjust the difference between 1st and 2nd print drums by adjusting only the write
start position for the 2nd print drum.
Symptoms
Incorrect adjustment leads to print positioning offset between the two print drums.
S1448
5 mm ± 0.5 mm
Printed image from
the 1st print drum Printed image from
the 2nd print drum
Within 0.5 mm
S1449