Micron Technical Reference V9 Volume 1 - 第240页

SQUEEGEE MODULE REPLACEMENT PROCEDURES 9.12 Technical Reference Manual Chapter Issue 6, Ju l 16 Alternative Drive Belt Replacement This replacement procedure applies to both fron t and rear belts. It is advised that driv…

SQUEEGEE MODULE

REPLACEMENT PROCEDURES

Chapter Issue 6, Jul 16 Technical Reference Manual 9.11

Front Squeegee

Drive Belt

To replace the front squeegee drive belt (left hand stepper motor), the printhead

mechanism must be removed from the print carriage.

1. Disconnect the following connectors from the print carriage, left hand side.

• Rear Squeegee Motor

• Front Squeegee Motor

• Home Sensors

• Squeegee Pressure Amplifier

2. Remove the printhead mechanism by unscrewing the four screws securing

the unit to the print carriage.

3. Placing the unit on a secure surface, slacken off the three screws securing

the left hand motor to the support plate.

Figure 9-3 Squeegee Stepper Motor (Green Ident Label Shown)

4. Fit the new belt in position.

5. Using a cable tie wrap or similar, provide a loop around the top of the body

of the motor enabling the motor to be pulled using a force meter. Ensure

that the force meter is pulled in the direction which the drive belt is fitted,

Rear Squeegee Motor Tensioning figure example refers.

6. Pull the force meter until a tension of 3-4kgs is monitored on the meter.

Tighten the three screws whilst the motor is under tension.

7. On completion re-fit the printhead mechanism to the print carriage refit the

drive belt cover plate and re-connect all leads to the print carriage, left hand

side.

8. Refit the squeegees.

Stepper Motor

Securing Screws

Front Squeegee

Motor

SQUEEGEE MODULE

REPLACEMENT PROCEDURES

9.12 Technical Reference Manual Chapter Issue 6, Jul 16

Alternative Drive

Belt Replacement

This replacement procedure applies to both front and rear belts. It is advised

that drive belts are replaced as a pair.

NOTE

1. If the underside of the stepper motors has a green ident label this procedure

does not apply;refer to figure 9-3.Follow the previous procedures for belt

replacements.

2. The pulley hole centres are fixed. There is no need for pulley belt tension

adjustment.

The squeegee drive belts can be replaced without having to remove the

printhead mechanism from the print carriage.

1. Pull the drive belt from its centre and slip it up over the idler pulley.

2. Slip the belt over the drive pulley and discard it.

3. Repeat Steps 1 and 2 for the other belt.

4. Hold the new belt in position. Align the teeth of the drive pulley with the teeth

of the belt and engage the belt on the pulley.

5. Whilst maintaining light tension on the belt in the drive pulley, to prevent it

from slipping off, rotate the idler pulley to align its teeth with the belts’ teeth.

6. Slip the belt down over the idler pulley; rotate the idler pulley if necessary to

aid fitment and alignment.

NOTE

Even with power removed the drive pulley does not rotate.

7. Repeat Steps 4-6 for the other belt.

8. On completion refit the drive belt cover plate and re-connect all leads to the

print carriage, left hand side.

9. Refit the squeegees.

R Stepper Motorear

Front Stepper Motor

Squeegee Motor Belt Replacement

Rear Drive BeltIdler Pulley

Idler Pulley

Drive Pulley

Front Drive Belt

SQUEEGEE MODULE

REPLACEMENT PROCEDURES

Chapter Issue 6, Jul 16 Technical Reference Manual 9.13

Fitting the

Squeegees

It is usual to fit two trailing edge squeegees and use the machine in the Print/

Print mode.

When fitting a single squeegee (trailing edge or diamond section) to the

machine, it must be fitted to the front squeegee mount only.

The following procedure describes a double trailing edge squeegee configura-

tion fit to the machine printhead mounting assembly.

1. Select Product Setup.

2. Select Change Squeegees.

3. The print carriage is driven to the front position.

4. Open the front printhead cover.

5. Fit the rear squeegee to the rear squeegee mount tightening the thumb-

screws finger tight.

NOTE

The locking thumbscrews on the rear squeegee are positioned wider apart

than those fitted to the front squeegee and the keyway slot is positioned on

the left hand side of the rear squeegee.

Item Description Item Description

1 Front Squeegee Mount 5 Front Squeegee

2 Rear Squeegee Mount 6 Front Squeegee Key and Keyway Slot

3 Locking Thumbscrew (in 4 positions) 7 Rear Squeegee Key and Keyway Slot

4 Rear Squeegee