GBC 25e - Manual (Page 19)

© 2002 IBICO Page 5-5
Operations Manual Patriot 25E
5.6 Adjusting film tension
Proper film tension, known as brake tension, is the
minimum amount of tension required to eliminate wrinkles
in the finished item.
The film tension is set at the factory. Periodic adjustments
should not be necessary unless other than 1.0, 1.5 or 3
mil film is being used or the lamination is curling up or
down.
The film should be taut. A properly adjusted roll of film
should not require excessive force to turn by hand. Film
tension should be enough to introduce a minor amount of
drag as the film unrolls.
Insufficient tension causes wrinkles while too much tension
between the top and bottom rolls creates curl. Too much
upper tension causes upward curl while too much bottom
tension causes a downward curl.
Follow the procedure described below to adjust film
tension.
1. To adjust the bottom brake, push and hold the brake
lever located on the left side frame by the roll of film.
Brake lever
2. Rotate the roll of film until the lever engages the internal
mechanism.
3. Rotate the roll of film clockwise to increase tension
and counter clockwise to decrease tension.
Increase
Decrease
4. Release the brake lever and check the tension by
rotating the roll of film. Resistance should be slight, not
forced.
5. Repeat steps above to adjust the top brake.
6. Run some test samples to verify proper brake tension.
Adjust if necessary.