LA 302 Pressure Controller Manual.pdf - 第27页

Installation 3-5 P/N 71 19797A 2006 Nordson Corporation LA 302 Issued 06/06 Accessories Required accessories Sleeve Encoder with cable 8 Power cable for proportional valve 9, 10 Adhesive gun with cable 2, 4 Power cable 6…

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1
1
Installation
3-4
P/N 7119797A
2006 Nordson Corporation
LA 302
Issued 06/06
Electrical Connections
(contd.)
Liquid Adhesive Gun
A solenoid valve triggered by the LA 302 opens and closes the adhesive
guns. The solenoid valve is located on the adhesive gun and is electrically
connected to the pressure controller.
Fig. 3-4 Electrical connections
1 Liquid adhesive guns
Proportional Pressure Control Valve
The glue for the adhesive guns can be fed e.g. by a connected container
pump via a pressure regulator. The pressure regulator is controlled
(pressure rises as production speed increases) via a proportional pressure
control valve supplied by one of the pressure controller outputs. Two
proportional pressure control valves can be connected to these outputs.
Fig. 3-5 Electrical connections
1 Proportional pressure control
valve
Installation
3-5
P/N 7119797A
2006 Nordson Corporation
LA 302
Issued 06/06
Accessories
Required accessories Sleeve
Encoder with cable 8
Power cable for proportional valve 9, 10
Adhesive gun with cable 2, 4
Power cable 6
2
4
9
10
8 6
Fig. 3-6
Installation
3-6
P/N 7119797A
2006 Nordson Corporation
LA 302
Issued 06/06
Initial Startup
NOTE: The compressed air used should be filtered and dry. If necessary, a
water separator or a pneumatic dehumidifier should be used to prevent ice
from forming.
It is imperative to perform the following steps in the stated order for initial
startup.
The stated position numbers refer to Figure 3-7.
1. Connect the compressed air to the air conditioning unit (1).
2. Stop compressed air supply on the air conditioning unit.
3. Connect the compressed air supply to the container pump (14).
4. Connect the compressed air supply to the adhesive gun (15).
5. Connect the proportional valve compressed air outlet (2) to the adhesive
pressure regulator (12).
6. Connect the adhesive outlet of the container pump to the pressure
regulator.
7. Connect the glue outlet of the adhesive pressure regulator to the
adhesive guns (8).
8. Electrically connect the LA 302 to the adhesive gun (5).
9. Electrically connect the LA 302 to the proportional pressure control valve
(2).
10. Electrically connect the LA 302 to the encoder (4), and mechanically
connect the production machine and encoder through the gear box.
11. Start the production machine and determine the lowest possible
production speed.
12. Switch on the applicator LA 302 with the mains switch (5, Fig. 2-3).
NOTE: Mode switches and potentiometers on the front of the pressure
controller will be designated alphabetically as mode switch / potentiometer
(A), (B), (C), ... beginning at the left and moving to the right. The LEDs are
designated LED (1), LED (2), ... beginning at the top left and moving to the
right.
13. Set the minimum speed (lowest speed at which the adhesive gun
nozzles open) to the desired initial speed (but not < 4 m/min) using the
potentiometer (E) on the LA 302. LED (3) should go off.
14. Slowly increase the compressed air on the air conditioning unit
(1, Fig. 3-7).
15. Run the system at minimum production speed and set the minimum
pressure for proportional pressure control valve 1 with potentiometer (C)
or the minimum pressure for proportional pressure control valve 2 with
potentiometer (F) such that the glue bead is even and cohesive.