V-TEK TM-500, User Manual

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D292144.9.fm Adjusting Seal Quality
Chapter 6: Troubleshooting 6-19
PSA Seal Adjustments
If a Peel Force Test determines the PSA Sealer is not generating a satisfactory seal, try one of
the adjustments below to improve seal strength.
Materials Used
For a PSA seal, seal strength is determined first by the nature of the materials used. It is nor-
mally recommended to use the same brand of cover and carrier tapes together as the manufac-
turers use the appropriate adhesive to match the material used to make the carrier tapes.
Seal Roller Pressure
The second factor in PSA seal strength is
the pressure applied to the cover tape as it
is sealed to the carrier tape. The seal
should appear as a solid stripe and it
should not show any inconsistencies. If it
does, the alignment of the cover tape
should be confirmed and then the pressure
to the seal rollers adjusted.
On the top of each sealer block, there are
three holes with a screw in the center hole.
With carrier and cover tape loaded, spin the
Sealer Wheel . While spinning the Sealer Wheel, turn
the screw clockwise until the wheel no longer spins freely, then turn the screw another 1/8 turn.
The wheel should be firmly in contact with the tape.
Adjust the seal roller pressure until the PSA adhesive is firmly adhered to the carrier tape. Expe-
rience will allow the operator to judge the correct adjustment by feel. Repeat for the other sealer
wheel.
Note: Excessive roller pressure may cause carrier tape advance problems or elongation
of sprocket holes in the carrier tape.
PSA Seal
Adjustment
Screw
Pressure