74 EasyCoder PX4i and PX6i Service Manual
Chapter 8 — Print Unit
Adjustment; Platen Roll Belt
Oversized holes allow the position of the stepper motor relative to the
bracket to be adjusted so the tension of the belt does not become too tight,
causing unnecessary wear. Check that the platen roller can be rotated freely
by the belt, which should fl ex just a little when you press it with your
fi nger.
Stepper motor
Stepper motor pulley
Belt
Platen roller pulley
#T20 Torx screw
#T20 Torx screw
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