Maintenance
5-1
Maintenance
As a result of years of experience, refined engineering and construction techniques, very little time need
be lost to maintenance. However, regular maintenance will keep your laminator operating at its optimum
level.
Removing the enclosure covers to work on machine exposes person
to electrocution and moving parts hazard. Only trained service
personnel should perform maintenance with any guards or covers
removed.
Nip Roll Section
The most critical adjustment of the nip and pull rolls is the “zero” position. This adjustment makes the top
roll parallel to the bottom roll which creates even pressure and pull distribution across the face of the roll.
If the rolls are out of adjustment, the machine will not laminate properly. Zeroing the nip is done at the
factory before shipment, but should be checked at startup and if laminator is not creating quality output.
Checking the Nip
1. Place two pieces of thin paper (approximately 1.0” wide by 12.0” long) between the upper
pressure roll and the lower roll (about 3.0” from each end).
2. Set the shim dial to the “0” setting and put the upper pressure roll in the down position by
activating pressure roll valve.
3. Pull gently on both pieces of paper, if both pieces of paper have the same drag, the nip is
fine, if the drag is different, follow the procedure below to correct the setting. The pull rolls
are adjusted the same as the nip rolls.
Zeroing the Nip
1. Loosen the sets screw in the cylinder stop.
2. Adjust the cylinder stop clockwise to raise the roll and counter clockwise to lower the roll.
3. Check the nip using the 3 steps shown in the
Checking the Nip
section.
4. Once the drag on the pieces of paper has been equalized, tighten the setscrew in the cylinder
stop.
Cleaning the Nip Rolls
Cleaning the nip rolls may require the nip rolls to be rotating. Rotate
the rolls at a very slow rate to avoid being pulled into the nip section.
Do not wear neck ties, loose clothing or hanging jewelry that could
be pulled into the nip section.
The nip rolls should be cleaned as often as necessary, the frequency will vary on the products used and
the processes being run. AGL recommends a mild detergent solution or denatured alcohol with a 100%
lint free cloth to clean the rolls. Your film manufacturer can recommend solvents that will remove the
adhesive from silicone and neoprene rolls without causing damage to the coverings. To facilitate the
cleanup process, adhesives should be cleaned from the rolls as soon as possible and while the roll is still
warm. A rubber "eraser" has been included in your accessory kit that can be used to clean the adhesive
from the warm rolls. Rub the eraser over the adhesive with the rolls turning very slowly. The cloth and
alcohol can be used to remove the residue.
Use of incorrect solvents on your nip can cause irreparable damage to
the coverings. Advanced Grieg Laminators,Inc. is not responsible for
damage to roll coverings caused by these solvents.
