IBM 5225 Operator's Manual page 45

C. Adjusting the Thickness Control
1. Use the following chart as a guide to initially set the thickness control to
match the type of forms you are using. Always reset the thickness control
whenever you load a different type of form.
on control with indicator
point.)
3-10 GA34-0054
Kind of forms
Single-part
Two-part
Three-part
Four-part
Five-part
Six-part
Thickness
control setting
0-3
4-'6
6-8
9-12
13-16
17-19
Warning: Actual settings depend on forms thickness variations. If the setting is
too low, ribbon smudging may occur; if the setting is too high, light, incomplete,
missing
printing, or ribbon damage may occur.
Use the lowest setting that does not cause ribbon smudging.