Roland GR-640 User Manual page 333

figure.
Press [ ].
Press [ ] or [ ] to display the screen shown in
the figure.
This setting will be enabled the next time the pinch rollers are lowered.
Press [ENTER].
Press [MENU] to return to the top screen.
Reducing the Force of the Middle Pinch Rollers
When using a wide sheet for which it is useful to use the middle pinch rollers in
order to prevent the material from coming loose during cutting but is also easily
marked by rollers, reduce the force with which the pinch rollers press down on the
material.
Procedure
Make sure the material is loaded in the machine.