Rapid-Air SERVO FEED: 200T & TX - Manual (Page 25)

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DRIVE ROLL PARALLELISM ADJUSTMENT
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 acutal 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
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 adjustment 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 preceeding
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.