Oki ML6300FB User Manual page 26

Set the Paper Thickness lever for overall paper thickness as
follows:
Overall paper thickness
0.06 – 0.12 mm
0.13 – 0.21 mm
0.22 – 0.30 mm
0.31 – 0.39 mm
0.40 – 0.48 mm
0.49 – 0.57 mm
0.58 – 0.66 mm
0.67 – 0.75 mm
0.76 – 0.84 mm
Notes
Printing with lever positions 5 – 9 is not guaranteed.
If the lever position does not suit the paper thickness,
paper feeding and printing may not work properly.
Do not print bankbooks to avoid possible pin
breakage/ribbon snagging.
Printing can be carried out with the lever position set
to 4 for paper thickness up to 0.39 mm.
When lever positions 5-9 are selected, printing quality
for carbon paper may decline resulting in illegible
characters for example.
Paper handling > 26
Lever position
1
2
3
4
5
6
7
8
9