Service manual

Hopper and Feeder Paper Guide Rails:
The two stainless steel rails mounted on the sides of the creeper conveyor
are adjustable via a locking handle at the rear. At the front they interlock with
the feeder side rails, and lock to shafts running across the machine. Both
sets of rails should be adjusted at the same time making sure there is only a
slight angle toward the feeder paper hopper to guide the paper gently
without pinching.
Paper Supply
The Creeper Conveyor supplies the bottom fed friction feeder continuously
while the operator loads paper from the top. It has 4 mounts (2 each side,
with set screws) in which the conveyor slides. The conveyor is located
behind the feeder. Paper level in the feeder hopper is controlled by a
demand switch also known as paper level detector. The position of the
creeper conveyor is important to the smooth operation of the supply. During
normal operation, a metal wand is adjusted such that the level of the paper
sitting on the main feed belt is ¼ to 3/8 of an inch. The adjustment is made
by turning the screw in the demand wand itself. Turning the screw to the
right will cause the demand wand to back out of the paper hopper allowing
more paper to be presented to the paper hopper by the creeper conveyor.
Turning the screw to the left will have the opposite effect. The demand
wand can also be set an different angles giving many adjustment positions
for optimum paper stacking in the paper hopper. Mainly the demand wand is
adjusted so that it rests on the top of the stack. As the stack of paper is
consumed the demand wand will slowly lower itself until it triggers a switch,
located on the singulator assembly. This trigger will turn on the creeper
conveyor belts and slowly refill the paper hopper until the demand wand is
lifted to its pre-adjusted setting.
INTRODUCTION
420T V6LT OPERATOR & SERVICE MANUAL ISSUE 2009/06 Rev. 6/21/2011 SECTION A – PAGE 11
071-33370-400