User manual

Preventive Maintenance
5-28 ProMaster 2500 User Manual
5. If necessary, remove the two screws that hold the guard in place.
Loosen the collar and remove the ribbon drive roller assembly from
the printer. Hold the roller with one hand and turn it with the other.
If more than a small amount of friction is felt, adjust the collar
counterclockwise until only a slight amount of friction is felt.
Note: If the ribbon drive roller assembly has a Belleville washer rather than a
finger spring washer (Part Number 265-4485-901), it should be replaced
with the finger spring washer, fingers out, followed by the washer, and
finally the collar, which allows for a greater range of adjustment.
6. Install the adjusted ribbon drive roller assembly by sliding the
complete assembly onto the shaft. Hold the assembly in place with
your index finger on the center of the drive pulley and thumb on the
ribbon drive roller, and tighten the collar with the assembly held in.
You might have to hold the back side of the clutch so the shaft does
not slide back.
Note: The collar tightens most easily and securely when the slots on the collar
are aligned with the slots on the ribbon drive roller.
7. Install the guard and check to make sure the ribbon drive roller is not
dragging against the guard. If the roller contacts the guard, shim the
guard out slightly using one or more flat washers.
8. Check the take-up roller. It should have only slight friction. Then
adjust the clutch on the shaft on the inside of the printer, if needed.
9. To check the adjustment, run PRINT ONLY mode and make sure all
of the following are true:
• Print quality is good (crisp, clear, legible, and properly aligned).
• Ribbon does not get caught in the application area.
• Ribbon takes up properly.
• Ribbon does not move during calibration.