Gerber GS750 Plus User Manual page 41

Tools and Tool Handling 33
To adjust the tangential blade
The knife blade holder assembly includes a small metal plate
called a shoe, which acts as a cutting depth stop to prevent the
knife blade from cutting through the vinyl backing material.
If the tool force setting is correct, but the weed does not peel up
easily, or letters peel up with the weed, adjust the shoe to expose
more of the blade instead of increasing the tool force setting. If
the setting is correct but the knife cuts through the backing, adjust
the shoe to expose less of the blade instead of decreasing the
tool force setting.
CAUTION: The blade is very sharp. Take care when handling
the knife holder and blade.
1. Loosen the hex screw with the Allen wrench.