Overview

The tape breaks or tears in the middle of the seal instead of at the end. This is caused by poor tape quality, excessive spring tension pressing the blade too hard, or incorrect blade position.

Step 1 — Use High-Quality Tape

Cheap or old tape breaks easily when cut. Always use tape rated for machine automation with consistent adhesive and thickness.

Check your tape:

• Look for tape designed specifically for packaging machinery (not hand tape).
• Check the expiration date—old tape becomes brittle.
• Replace the roll if you see uneven adhesive or thin spots.

Step 2 — Reduce Spring Tension

If the main spring is too tight, the blade presses so hard on the tape that it tears or breaks instead of cutting cleanly.

Adjust the spring:

• Locate the spring tension adjustment dial or screw on the tapehead.
• Turn it counterclockwise (left) one half-turn.
• Test with a carton. If tape still breaks, reduce tension further in small steps.
• Stop when tape cuts cleanly without breaking.

Step 3 — Set Blade Height Correctly

If the blade is set too low, it bites too deeply into the tape and causes breakage. The blade should cut cleanly with minimal pressure.

Adjust blade height:

• Measure ¼ inch down from the bottom of the tab adjustment bracket.
• Use the blue plastic tool from your tapehead toolbox to set the blade to this height.
• The blade should be parallel to the bracket and not tilted.

Maintenance Tips

• Record the correct spring tension setting for each tape type you use.
• Inspect the blade height monthly to ensure it has not shifted.
• Replace the blade before it becomes dull—a sharp blade cuts without tearing.