Rapid-Air SERVO FEED WITH TRANSTERM: C, S, X, HT SERIES - Manual (Page 24)

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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
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 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.