Roland GR-540 User Manual page 204

You can now enter the values.
Enter the Perforated Cutting Conditions.
Set the length of each perforation to make in the material (the perforation length) and the length of the
part that is not perforated because the blade force is reduced (the half-cut length).
Adjust the half-cut force to suit the type of material or paper used.
About the Perforation length/Half-cut length
*1: Perforation length
*2: Half-cut length
Perforation length > Half-cut length