D1_ServiceManual_e.pdf - 第46页

4 Electrical Section 4-6 ● LG9-M90H6-00X PHOTO SENSOR WT4-2N112S28 (SICK) z PC B arrival sensor z Entrance buffer arrival sensor ■ Adjusting Method ① Use a precision flat-blade screwdriver to turn the sensitivity volum e…

4 Electrical Section

4-5

Adjustment of Board Detection Sensors

■ Sensors

z LG0-M90H3-00X PHOTO SENSOR EX-22A (SUNX)

･ Entrance Sensor

･ Exit Sensor

･ Entrance Buffer Arrival Sensor

■ Adjustment

z LG0-M90H3-00X PHOTO SENSOR

① Place a production board on the conveyor.

② Turn the Sensitivity Adjuster fully counterclockwise to the sensitivity minimum position. (The

adjuster turns 3/4 rotation overall. If it is turned clockwise, the sensitivity increases, if turned

counterclockwise, the sensitivity decreases.)

③ Turn the Sensitivity Adjuster clockwise slowly and confirm the point “A” where the Orange LED

lights up.

④ Remove the board and continue to turn Sensitivity Adjuster clockwise and confirm the point “B”

where the Orange LED lights up. (If the sensor does not light up, just turn the adjuster clockwise to the

end.)

⑤ Turn the Sensitivity Adjuster to the center of “A” and “B”. Determine the point as a detecting point.

⑥ Put back the board on the conveyor. Be sure that the Orange LED and Green LED light up at the same

time. When you remove the board, only the Green LED should light up.

NOTE: If your machine is equipped with the CE safety conveyor cover, make sure to stick the black rubber sheet

(LG0-M9AA1-00 GOM) on the bottom surface of the cover to prevent mis-detection.

Operation Indicator (Orange LED)

(Indicators are located on the back.)

Stability Indicator (Green LED)

Sensitivity Adjuster

MAX

4 Electrical Section

4-6

● LG9-M90H6-00X PHOTO SENSOR WT4-2N112S28 (SICK)

z PCB arrival sensor

z Entrance buffer arrival sensor

■ Adjusting Method

① Use a precision flat-blade screwdriver to turn the sensitivity volume counter-clockwise as far as it will

go, to set the sensitivity to the minimum level. Place a PCB on the conveyor belt in the direction in

which PCBs will be placed for actual production operation, transfer it to a position just over the arrival

sensor, and turn the sensitivity volume clockwise until the sensor’s receiver indicator lights up.

NOTE: The sensitivity volume can be turned approx. five turns between the maximum and minimum level

positions. When the volume is beyond the maximum or minimum level position, a ratchet will be activated

and the volume turns freely with a chattering sound. The position at which such sound is heard is the limit

of the adjustable range.

② With the PCB placed on the conveyor belt, move it just above the arrival sensor back and forth a few

times by hand, to check that the receiver indicator turns ON and OFF in response to the PCB.

NOTE: The receiver indicator has three states: ON = stable operation, OFF = no sensitivity, Blink = unstable

operation. When adjusting the volume or checking sensor’s response to the PCB, make sure that the

indicator is not blinking.

③ From position (2), turn the volume 1/4 turns (90 degrees) clockwise to increase the sensitivity.

④ For verification, select [Manual] – [PCB Sensors ] to open the [PCB Sensors ] window. Check that the

PCB arrival sensor/entrance buffer arrival sensor respond to the PCB correctly. Also select [Manual]

– [Load Board ] to check that the PCB is automatically clamped properly.

NOTE: If the sensitivity is set excessively high, a malfunction may occur when the head passes over the arrival

sensor.

Receiver

indicator

Sensitivity Adjustment

by Volume

Higher

sensitiv

Lower

sensitiv

Sensitivity volume

Emitter/receiver

4 Electrical Section

4-7

Cautions about overall electrical items

Once rats enter indoors or buildings, they easily get into machines. They may tear wirings and leave

excrement that can cause serious damage to machines.

If rats tear wirings, it may cause short circuits. And it could cause a serious problem to machines.

If rats leave excrement over printed circuits boards or bared cables, it will be carbonized and may cause

fire.

REFERENCE:

Below is an example we had fire from a board. (See the pictures below.)

You can see blue-green attached material on the burnt location.

When copper burns, Cuo (copper oxide II) is black and Cu2O (copper oxide I) is red. According to the

blue-green color, the attached material can be considered Copper hydroxide. By this fact, we suppose water

existed on the burnt location.

Blue-green

attachments

COUNTERMEASURE:

1．Keep the room clean, neat and organized.

2．Lock up the room with no openings.

If once rats came in;

3．Sprinkle rat repellent.

4．Catch rats with adhesive sheets. (Emergency countermeasure)

5．Hire an rat exterminator.

To prevent damage caused by rats, it is important to keep rats-free environment.

If already rats are in your space, exterminate them by using rat repellent or other ways as mentioned above.