Riso V8000 Series, Technical Manual

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CHAPTER 5. SECOND PAPER FEED SECTION
4. Vertical Print Position Variation Check (Print Registration)
(1) Run Test mode No. 051 (TPH test print with thin cross lines) for 1st and 2nd print drums.
(2) Shift the horizontal printing position maximum to the machine drive side (left) on the 1st print drum.
(3) Shift the horizontal printing position maximum to the machine operation side (right) on the 2nd print
drum.
(4) Print 30 copies at the maximum printing speed (120 rpm).
(5) Remove first 5 prints and sample the 6th to 30th prints and measure the variation in vertical printing
position as shown in the diagram. Check that these are within 0.5 mm.
Within 0.5 mm
6th Print 7th Print 8th Print 9th Print 10th Print l 30th Print
Rear Front
Within 0.5 mm
30th Print l 10th Print 9th Print 8th Print 7th Print 6th Print
5. Automatic Multiple Paper Feed Adjustment
(1) Load 50 gram A3 white paper on the paper feed tray.
(Or white blank paper which is used the most on the machine.)
(2) Run Test mode No. 457 (Auto Multi-Paper Feed Det. Adj.).
(3) Paper feed starts automatically, halting when the paper has been fed through 20° paper drum turn
(counted by the main motor limit sensor) from the activation of the 2nd paper feed sensor. The multi-
feed det. sensor sensitivity is automatically adjusted. Once the multi-feed det. sensor sensitivity is
adjusted, paper feed resumes, and the paper is ejected out.
S0526 S0527