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D292104.9a.fm Adjusting PSA Seal Quality Chapter 7: Troubleshooting 7-29 Adjusting PSA Seal Quality If a Peel Force T est determines the PSA Sealer is not generating a satisfactory seal, try one of the adjustment s below…
7-28 TM-401 User’s Guide
Adjusting Heat Seal Quality D292104.9a.fm
Seal Pressure
This control is located on the front of the Taper. It controls the
amount of force applied when the sealer shoes drop. Turning
the Seal Pressure control clockwise will increase the pressure,
while turning it counter-clockwise will decrease the pressure.
Adjust the heat shoe Seal Pressure to the appropriate setting.
The recommended starting point is between 40-60 psi.
Sealer Dwell Time
Open the HMI Taper Tab. Press the right Arrow button twice to advance to the third Taper
screen.
The Dwell Time is the amount of time the sealer spends in contact with the cover tape. Increase
or decrease the dwell time.
Note: The dwell time affects the throughput of the taper. The recommended Dwell Time
is 400 ms.
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D292104.9a.fm Adjusting PSA Seal Quality
Chapter 7: Troubleshooting 7-29
Adjusting PSA Seal Quality
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.
Check Sealer Settings
Open the HMI Taper Tab. Review
the settings on the four Taper Tab
screens to ensure Tape Settings and
Sealer Settings are appropriate for
the current job.
Materials Used
For a PSA seal, seal strength is
determined first by the nature of the
materials used. It is normally recom-
mended to use the same brand of
cover and carrier tapes together as
the manufacturers use the appropri-
ate 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 inconsisten-
cies. 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.
Experience 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
Screws
Pressure
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