Rapid-Air SERVO FEED: 100C, 100D series - Manual (Page 17)

Every servo feed has an eccentric
adjustment screw to adjust the upper
roller to be in parallel to the lower
roller. The maximum adjustment is
.008” on the eccentric.
The adjustment screw is located
behind the belt cover and is held fast by
a 10-32 socket head cap screw. The
actual adjustment screw is a slotted
eccentric pin which is turned
clockwise or counter-clockwise to
raise or lower one end of the upper roll.
The parallel adjustment is factory
set when the unit is manufactured
but if material tracking seems to be a
problem then this could be a way of
solving the problem. To test if the rolls
need adjustment, do the following.
1. Remove the front and rear roll covers.
2. Raise the anti-backup rolls. (If any)
main rolls should be closed.
DRIVE ROll PARAllElISm ADjUSTmENT
Drive Roll Parallelism Adjustment Procedure
3. Shine a light from the rear of the
feed toward the main rollers.
4. Inspect from the main rolls side
to see if the rollers are parallel.
If they are then the material could
be the cause of the material
walking. If they are not parallel
then an adjustmet has to be made.
5. To make the adjustment:
a. Remove manual roll release
arm by removing roll pin.
b. Remove belt cover.
c. Locate eccentric screw and
loosen 10-32 screw.
d. Turn slotted eccentric screw
while viewing rolls until the
rolls are parallel.
e. Tighten 10-32 screw and
reassemble parts, then retry
running material.
For a more accurate adjustment use
a feeler gage to check the parallelism.
This completes the eccentric adjust-
ment write-up. If there are further
questions, please call the factory.
NOTE: Before attempting to solve a
possible roll parallelism problem by
readjusting the rolls or calling the
factory, the following test should be
performed.
Step one:
A 3 to 5 foot length of material
should be cut from the storage loop
preceeding the servo feed.
Step two:
Lay the material next to a straight line
to see if the material is cambered. If
it is then this could be the reason that
the material is walking. If not, then
turn the material upside down from
the way it was being fed and insert
into the feed. If the material walks
in the opposite direction then the
material could be to blame.