Intermec EasyCoder PF2i Service Manual page 117

Chapter 8—Liner Takeup Unit
The takeup hub is driven by a pulley on the right side of the stepper motor
via a timing belt, which runs in a recess in the center section behind the
media guide assy. (To simplify manufacturing, the timing belt is fi tted in
all printers, but when there is no takeup unit it does not engage the pulley
of the stepper motor). The dimensions of the pulleys make the takeup hub
rotate somewhat faster than the media is being fed out, thus providing a
certain tension to the liner. A wrapped spring clutch inside the takeup hub
allows it to slip so as to limit the tension. An extra guide shaft fi tted to the
center section separates the liner from the media path.
The liner drive roller (standard) underneath the platen roller helps pulling
the liner (see Chapter 7.1).
The tension of the timing belt cannot be adjusted.
Intermec EasyCoder PF2i, PF4i, and PF4i Compact Industrial—Service Manual 109