Oki LD670 User Manual page 219

(2) Set the paper width by positioning the partitions in the roll paper unit.
[1] Orient the paper roll along the direction arrow A.
[2] Loosen the knob screws front and back that fix the partition.
[3] Align the partition to the width of the paper roll, and slide in the direction
of the arrows B.
[4] Fix the partition leaving a slight gap as shown in the diagram.
Front: Leave a gap of one gradation on the scale between the partition and
the paper roll, and then tighten the (front) knob screws to fix.
Back : Leave a gap of one 1 to 3mm using the scale between the partition
and the paper roll, and then tighten the (back) knob screws to fix.
Thumbscrew (front)
Front
Partition
B
Partition
Front
Roll paper
Roll paper
217
Thumbscrew (rear)
B
Rear
A
Partition
Rear