YSD_Users_E.pdf - 第52页

1-12 1 Part names and functions 4. Front panel switches The following describes the pneumatic and temperature-control switches located on the font operation panel. Front panel switch layout Syringe internal negative pres…

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Part names and functions

3.4 Dot station (option)

The dot station is used as a dummy board where the dispenser head performs predispensing, such as in the

following cases:

• Dispensing for position correction

• Performing a dot feedback to prevent a reduction in the dispensing dot size which may be caused

by a change in the remaining amount of dispensing liquid. (Dispensing amount correction)

• Predispensing during dispensing task to stabilize the first dispensing from a head that has not been in

use for a long time. (Automatic predispensing)

A roll of special paper (automatically rolled up) is used as the dummy board on which predispensing is

performed. After a syringe is replaced with a new one, the first dispensing liquid can be dispensed into a liquid

disposal cup. Predispensing is performed on the dot station with the paper held by vacuum.

NOTE

For more details on the dot station, see "5. Dot station (option)" in Chapter 4.

Dot station

Dot station main body

Pre-dispensing location (special paper)

Negative pressure indicator

Liquid disposal cup

63109-N7-10

Negative pressure indicator

This indicator displays a negative pressure used to hold the paper by vacuum. The color of the displayed value changes

according to the negative pressure level.

Green: Negative pressure level is appropriate.

Red: Negative pressure level is not appropriate. (An error will occur during predispensing.)

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Part names and functions

4. Front panel switches

The following describes the pneumatic and temperature-control switches located on the font operation panel.

Front panel switch layout

Syringe internal

negative pressure indicator

Dispensing pressure

(positive pressure) indicator

Dispensing pressure

adjusting knob

Syringe internal negative

pressure adjusting knob

63110-N7-00

1. BLOW

Adjust the dispensing air pressure during dispensing. (For details on how to adjust the air pressure, see “3.7 Performing a

dispensing test” in Chapter 2.

2. VACUUM (option)

When using low-viscosity adhesive or paste, apply a negative air pressure in the syringe in order to prevent the adhesive

or paste from dropping from the nozzle tip.

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Part names and functions

5. Conveyor unit

The conveyor unit used to clamp a board consists of the following devices.

Board

Conveyor unit

63112-N7-00

1. Main stopper

When a board is carried in on the conveyor, the main stopper halts travel of the board in the work position.

2. Push-up plate

The push-up plate clamps the board up against the conveyor rails, with the push-up pins (supporter pins) placed on the

push-up plate.

3. Push-up pins

These pins are arranged on the push-up plate and secure the board by pushing it up from the bottom.

4. Board hold plates

These plates hold the edges of the board from above when the board is clamped in the work position.

The positions can be adjusted according to the board size.

5. Board clamp

The board clamp secures the board by pushing its edges up against the board hold plates.

6. Dot station (option)

This is used as a dummy board where adhesive, etc. is predispensed.

7. Touch sensor (option)

When replacing a nozzle, this sensor is used to correct variations in the height (length).

8. Entrance stopper

(standby position stopper)

(option)

This stopper is installed at the standby position where the next production board is stopped.

9. Liquid disposal cup

This is a disposal cup used to receive liquid that may drop during replacement of a syringe. Prepare a cup of the

appropriate size.