2500_Users_Manual - 第182页

Preven tive Maint enance 5-28 ProMa ster 25 00 U ser Ma nual 5. If necessary, remove the two screws that hold the guard in place. Loosen the collar and remove the ribbon drive roller as sembly from the printer. Hold th e…

Preventive Maintenance

ProMaster 2500 User Manual 5-27

Label Calibration

Change the label calibration value using the STOP command described in

the following procedure.

1. Press

STOP

to pause the 2500 while a Task is running.

2. Press

LOWER CASE

. The 2500 displays:

where

XXX

represents a numeric value for the current setting.

3. Press

↑

↓

to change the label calibration value (the range is from 0

to 255). Entering a larger numeric value moves the printed characters

closer to the leading edge of the label.

4. Press

START

to continue running the Task.

Label Advance

The label advance value defines how far a label is extended above the

application plate just before it is applied to a device (see Figure 5-14).

The value can be changed by pressing

STOP

and

LOWER CASE

Increasing the numeric value advances the label farther above the

application plate.

Adjusting the

Thermal Printer

When the thermal printer is operating correctly, the label and ribbon

material advance smoothly and without any binding or excess slack. If

any of the clutches that are attached to the rollers begin to bind, they can

cause the feeding and advancing of both label and ribbon material to go

out of adjustment.

To adjust the thermal printer, follow these steps (see Figure 5-9):

1. Starting with the ribbon (supply) roll hub, check that it has only slight

friction. Remove the ribbon hub and spring washer.

2. Hold the spring washer in your hand and, using small needlenose

pliers, bend the three fingers so they produce less (or more, if

required) friction on the hub.

3. Reinstall the spring washer and hub on the printer. Check that there

is now only slight friction.

4. Print a label and observe the amount of slack in the ribbon when the

printer head pivots up to print. The ribbon should droop down about

3/4” when the print head pivots up. If it does not, loosen the lock nut

on the damper at the top of the air cylinder using small needlenose

pliers, and adjust it counterclockwise with a small flat- blade

screwdriver until the head pivots up fast enough to create the droop.

Then tighten the lock nut with the small needlenose pliers.

PROGRAM/TEST LABEL

SLAVE MODE PART TYPE: DIP 24-.3

PART TOTAL: 251 PART LENGTH: 1.250

LABEL CAL: (XXX)

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.

Preventive Maintenance

ProMaster 2500 User Manual 5-29

Figure 5-9

Thermal Printer Ribbon Path

2304-2

PRINT HEAD (Retracted position)

RIBBON ALIGNMENT ROLLER 2

RIBBON ALIGNMENT

ROLLER 1

RIBBON DETECT OPTIC

RIBBON ROLL

RIBBON PINCH

ROLLER

RIBBON DRIVE ROLLER

PLATEN

RIBBON TAKE-UP ROLL

APPLICATION AREA

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