UBI EasyCoder 501 – Service Manual
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8.3
Pressing Roller
8. PRINT UNIT, cont'd.
The pressing roller is coated with silicon rubber. It is imperative that
the roller is clean, free from uneven wear or dents, and exactly
aligned with the printhead (see chapter 24.3). The roller is sup-
ported by two ball bearings and can be replaced as follows:
• Remove the screws that hold the stepper motor to the motor
bracket and pull out the motor. Do not remove the bracket.
• Pull the belt away from the pulley of the pressing roller.
• Using a 2 mm hexagon wrench, loosen the single grub screw that
hold the pulley on the shaft.
• Using a #T20 Torx screwdriver, remove the bracket that holds the
bearing at the outer end of the shaft.
• Pull out the roller and the two ball bearings.
• Reassemble in reverse order using a fresh set of roller and ball
bearings. The distance between the pulley of the pressing roller
and the inner gable of the print unit should be 5 mm (.2").
• Check the tension of the belt (see chapter 8.4). Also check printout
quality by means of test labels (see chapter 24.1).
Upper part of print unit
omitted to give better view.
Belt
Ball Bearing
Ball Bearing
Stepper
Motor
Bracket
Pulley
Pressing Roller
Bracket
#T20 Torx Screw
NOTE!
Stepper motor bracket dismantled to
give better view. Bracket does not need
to be dismantled for replacing the
pressing roller.
