Riso V8000 Series, Technical Manual

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CHAPTER 4. FIRST PAPER FEED SECTION
Adjustment
1. Paper Width Potentiometer Adjustment
Check and adjustment procedure
(1) Position the paper guide fences at 100 mm and run test mode No. 450 (Paper size VR adjust
100 mm).
(2) Position the paper guide fences at 300 mm and run test mode No. 451 (Paper size VR adjust
300 mm).
(3) With the paper guide fences still at 300 mm, run test mode No. 471 (Paper width metric data),
confirming that the figure displayed is 3000 ± 10.
Symptoms
Incorrect adjustment will not allow the size of the paper in the paper feed tray to be correctly identified,
causing the machine not to function properly.
2. Elevator Upper Limit Sensor A Position Adjustment
Check and adjustment procedure
(1) Remove any paper in the paper feed tray, then remove the paper feed tray cover.
(2) Start test mode No. 453 (Elevator motor servo action), raise the paper feed tray, and bring it to a
complete stop.
(3) Once the paper feed tray is halted, check that the gap between the pickup roller and the paper
feed tray is 2 mm ± 0.25 mm.
(4) If the gap is not within these specifications, adjust by loosening the screw on the elevator upper
limit sensor bracket and moving the elevator upper limit sensor up or down together with the
bracket.
Symptoms
Positioning the elevator upper limit sensor too high increases paper feed pressure, increasing the
potential for multiple paper feeds.
Positioning the upper limit sensor too low will result in reduced paper feed pressure, increasing the
potential for paper misfeeds.