usi ARL-PRO-2700 Owner's Manual page 11

3.5 Film Tension for Encapsulating...
To adjust the film tension on the Top and Bottom Supply Mandrels, the laminator must be loaded
and heated. Remove the Heat Guard and Feed Table and then loosen the tension on both rolls
of laminating film by turning the Tension Adjustment Knobs counter-clockwise until there is no
drag on either the Top or Bottom Supply Mandrels. Turn the Speed Control Knob to a slow
speed setting and set the Motor Drive Switch to the "FORWARD" position. As the film runs
through the laminator with no tension it will appear wrinkled and bubbly. Gradually increase the
tension on both the Top and Bottom Supply Mandrels by turning the knobs clockwise until the film
is smooth on the Heated Laminating Rollers and is no longer wrinkled and bubbly appearing.
Notes:
 For best results, reset the film tension with EACH new set of film rolls.
 As the film supply becomes low and the roll diameter decreases, it is necessary to
decrease the tension on the film rolls.
 Too little tension on the Top or Bottom Supply Mandrels causes vertical or diagonal
streaks in the film as it passes over the Heated Laminating Rollers.
 Excessive tension will lead to increased wear on the laminator and will cause exiting
laminating film to curl excessively.