Roland GR-640 User Manual page 205

Step 5: Load the Printed Material
Procedure
Check the origin for cutting of the printed material.
Turn on the cutting machine.
Wait for the initial operation to finish.
Set the origin for cutting to the lower-left corner of
the material, and then load the material in the
machine.
If the material is loaded in the wrong direction, the machine
will not be able to read the crop marks.