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8-7 8 Inspection and maintenance 2.3 Adjusting the conveyor belt tension T he boards are moved by conbey or belt drive. If the conv eyor belts are too loose, they ma y slip on the pulleys causing unstable board transfer …

8-6

Inspection and maintenance

Section Check item Checkpoint Contents of inspection/work

Weekly (Date) Monthly

/ / / / /

Cleaning Lubrication

Cleaner

Cleaner main

unit

Up/down

operation

Roll sheet wind-

• Check that the up/down operation timing

is correct.

• Check that the roll sheet is wound up

correctly.

Cleaner head

Contamination

inside head

Solvent dispense

status

Check the cleaning solvent dispense

status or the head for contamination.

Suction unit

hose

Crack,

deterioration

* Check the hose for crack. If the hose

deteriorates, replace it.

• Check that the swing unit beside the

cleaner head functions smoothly.

Suction unit

Filter inside

suction unit

Operation

* Clean the contamination of the filter.

Replace the filter if necessary.

Others

Each sensor

Contamination

on sensor

Operation

* Check the senor or dog for foreign

matter or solder sticking.

Clean the sensor or dog if necessary.

Air supply part

Air filter

Mist filter

* Clean the contamination of the filter.

Replace the filter if necessary.

Controller Filter

* Clean the contamination of the filter.

Replace the filter if necessary.

2.2.4 Parts recommended for periodic replacement

For parts listed in the table below, it may be predicted that the service life of the part is expired or the part

deteriorates even though no trouble is found through the visual check during the periodic inspection.

To maintain the performance of the machine at its optimal operating level, it is recommended to periodically

replace these parts.

Periodic replacement parts

Part No. Part name Q'ty Location used Replacement interval

KHT-M3674-02X

TUBE 25

ø25-suction hose connected from

the left side of the cleaner unit to

the rear of the machine.

Replace periodically every

time the total production

quantity reaches 3 million

boards.

KHU-M3756-01X PUMP 1 Solvent pump

Replace every time the

number of suction unit

operation cycles reaches

1,440 thousand cycles.

Check the operation records

on the [Unit log]-[Cleaner] tab

screen.

KHW-M8582-40X VALVE 1 EA valve

Replace every time the

operation count reaches 20

millions.

CAUTION

The part Nos. given in this manual are the original part Nos. which were assigned to the parts when this manual was

issued. Because these part Nos. may be changed without prior notice, be sure to verify the latest part Nos. before

ordering parts.

8-7

Inspection and maintenance

2.3 Adjusting the conveyor belt tension

The boards are moved by conbeyor belt drive. If the conveyor belts are too loose, they may slip on the pulleys

causing unstable board transfer. If the belts are too tight, they may break or wear excessively. The tension of

each belt on the fixed and movable rails should be adjusted evenly. If necessary, adjust the tension as follows:

2.3.1 Board carry-in and carry-out conveyors

Required tools

• Hex wrench (3mm)

• Phillips screwdriver

Change the conveyor width to a

convenient width for maintenance

work.

1. Press the [Width] button to display the

"Conveyor Width" dialog.

2. In the "Target Width" box, enter a width

large enough for maintenance work

(about 200mm) and press [OK].

The conveyor is changed to the width

that was just entered.

64801-L3-00

Press the emergency stop button.

Detach the conveyor cover.

Detach the conveyor cover (acrylic cover

and plate) to access the conveyor.

1. Detach the acrylic cover.

Remove 10 screws to detach the acrylic

cover.

NOTE

There are washers with screws. Be careful not to lost

them.

2. Detach the plate.

Remove 4 screws to detach the plate.

63814-L3-00

TIP

In the case of the machine with the conveyor

extension, open the safety cover of the conveyor

extension to work.

Changing the conveyor width

Step 1

Removing the conveyor cover

Step 3

Screw

Acrylic cover

Screw

Plate

8-8

Inspection and maintenance

Loosen the belt tension.

Use the hex wrench (3mm) to Loosen the

two mounting bolts of the tensioner (pulley

bracket) so that he tensioner can move. It

doesn't need to remove the bolts.

63812-L3-00

Adjust the belt tension.

Slide the tensioner to adjust the belt tension.

Tighten the mounting bolts of the

tensioner (pulley blacket).

If the belt tension isl loose, adjust the

tensioner position to tighten the belt.

CAUTION

Tighten the mounting bolts of the pulley and pulley

bracket to the following torques:

• Pulley mounting bolt : 3.8N•m.

Be careful not to tighten the bolts excessively.

NOTE

The speciﬁcation of the conveyor belt tension is in the

following. Use the tension meter to adjust as needed.

• Conveyor : 184 to 197 Hz

• Conveyor extension : 102 to 109 Hz

Check the belt rotating condition.

1. Cancel emergency stop.

2. Press the [Conveyor Drive Allow] buttons

on the [Unit] - [Conveyor] screen to turn

on the conveyor motor and check the

belt rotation.

3. If the slip of the motor pulley, the belt

rotation fluctuation and the deflection

are excessive, adjust the tensioner (pulley

blacket) position and transfer a board

again and check the condition.

Reattach the conveyor cover.

Tighten the four screws on the plate with

pushing the plate upward to reattach the

conveyor cover.

Step 4,5

Tension measurement positions

Adjusting the conveyor belt tension

Tensioner (pulley bracket)

mounting bolt

Hex wrench (3mm)

Conveyor belt