Rapid-Air SERVO FEED / RAPID MASTER - Manual (Page 12)

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.
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
adjustment 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 gauge to check the parallelism.
This completes the eccentric adjust-
ment write-up, if there are further
questions, please call the factory.
* Before attempting to solve a
possible roll parallelism problem
by readjusting the rolls or calling
the factory, perform the following
test.
Step 1) A 3 to 5 foot length of material
should be cut from the storage loop
proceeding the servo feed.
Step 2) 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.
parallelism
Drive.Roll.Parallelism.Adjustment