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Problem Cause Correction
Box rear flap pulled back out of box. Rear flap folder out of adjustment. Adjust Rear Flap Folder (refer to
Section 3).
Flaps not positioned properly
before entering case sealer. Position flaps properly.
Front of box crushed by upper Paddle is not returning after Adjust Paddle Pressure Regulator
head assembly. previous box. (refer to Section 3).
Crease marks on upper surface of Upper head assembly is coming Adjust Case Top Sensitivity
box. down too far. (refer to Section 3).
AdjustCounter-Balance Pressure
Regulator (refer to Section 3).
Adjust Upper Head Assembly
Down/Up Rates (refer to Section 3).
Box drives to fork, belts stop, head PC 6 blocked. Remove blockage.
doesnt come down, and no further
machine operation.
Tape leg on front of case is too long. Tape is threaded incorrectly. Tape must go around tension wrap
roller before going around one-way
tension roller.
Tape tension is too low. Adjust One-Way Tension Roller
(refer to Section 3).
Knurled roller drags. Check for adhesive build-up
between the knurled roller and its shaft. If problem continues, replace
with new flanged roller
78-8070-1367-3.
Tape tracks to one side or drags on Adjust Tape Web Alignment
support tabs of the applying frame. (refer to Section 3).
One-way roller is not positioned Position roller in its mounting slot
properly. so that tape extends beyond the
centerline of applying roller.
Head is not set up properly. Check leg length adjustments.
Blade does not cut tape or tape end Blade is dull and/or has broken Replace blade.
is jagged or shredded. teeth.
(continued) Tape tension is not sufficient. Adjust one-way roller to increase
tape tension.
Troubleshooting 3M-Matic 800rf Case Sealer
6-2 Copyright 1999, 3M IPC. All rights reserved.