Overview. Graco 313227A PRO Xs Auto Waterborne Electrostatic Air Spray Gun


Add to my manuals
48 Pages

advertisement

Overview. Graco 313227A PRO Xs Auto Waterborne Electrostatic Air Spray Gun | Manualzz

Overview

Overview

How the Electrostatic Air Spray

Gun Works

The automatic electrostatic air spray gun operates very similar to a traditional air spray gun. The atomization and fan air are emitted from the air cap. The atomization air breaks up the fluid stream and controls the droplet size. The fan air controls the shape and width of the spray pattern. The fan and atomization air can be adjusted independently.

Operating the Spray Function

Applying a minimum of 50 psi (0.35 MPa, 3.5 bar) air pressure to the gun manifold’s cylinder air fitting (CYL) will retract the gun piston, which opens the air valves and a short time later opens the fluid needle. This provides the proper air lead and lag when triggering the gun. A spring returns the piston when the cylinder air is shut off.

Gun Features and Options

• The gun is designed for use with a reciprocator, and can be mounted directly on a 1/2 in. (13 mm) rod.

With additional brackets, the gun can be mounted for robotic applications.

• The gun’s quick-disconnect design enables its removal without disconnecting the fluid and air lines to the gun.

• Gun functions are activated from a separate controller that sends the appropriate signal to the actuating solenoids.

• The optional fiber optic readout system can be installed to monitor the gun’s spraying voltage. A fiber optic cable connected to the gun manifold carries the signal from the gun to a remote display module. Part No. 224117 Display Module displays the gun’s spraying voltage and current. Battery-operated Display Module 189762 displays the gun’s spraying voltage only.

Operating the Electrostatics

To operate the electrostatics, apply air pressure to the gun manifold’s turbine air fitting (TA) through a Graco grounded air hose. The air enters the manifold and is directed to the inlet of the power supply turbine. The air spins the turbine, which then provides electrical power to the internal high voltage power supply and external charging probe. Atomized fluid particles become charged as they pass by the external probe, and are attracted to the grounded workpiece, evenly coating all surfaces. The external charging allows the fluid supply to remain grounded at all times, eliminating the need for an isolation system.

The turbine air is exhausted into the shroud and out the back of the manifold through the exhaust fitting (EXH).

The exhaust air helps keep contaminants out and helps keep the gun clean.

Changing the kV Setting

For this external charge gun it is recommended that the gun be left at full voltage, but if needed the voltage can be reduced.

The gun’s full voltage setting is 60 kV. Three lower voltage settings are possible by actuating the KV1 and KV2 switches. Supply 50 psi (0.35 MPa, 3.5 bar) air pressure to the KV1 and KV2 ports. Turn the air on or off as shown in Table 1 to set the desired voltage.

The solenoid valves used to activate the KV1 and KV2 switches must bleed the air out of the lines for the switches to draw back to the higher voltage setting.

Table 1: KV1 and KV2 Switch Settings

KV1 Air

OFF

OFF

ON

ON

KV2 Air

OFF

ON

OFF

ON

Output Voltage (kV)

60

50

40

35

313227A 5

Overview

A

TI13395a

C D E

H

G

F

TA

CYL

A1

P1

TI1577A

Manifold Back View

EXH

KV1

FO

KV2

A2

J

B

F IG . 1. Gun Overview

Key

D

E

F

G

A

B

C

H

J

6

Air Cap

Fluid Nozzle

Retaining Ring

Shroud

Mounting Bracket

Manifold

Turbine

Power Supply

External Charging Probe

TI13426a

A1

Manifold Markings

Atomization Air Inlet Fitting

A2 Fan Air Inlet Fitting

CYL Cylinder Air Inlet Fitting

EXH Shroud Exhaust Outlet Fitting

FO Fiber Optic Fitting (shipped unassembled)

KV1 kV Switch 1 Air Inlet

KV2 kV Switch 2 Air Inlet

P1

TA

Fluid Supply Inlet Fitting

Turbine Air Inlet Fitting

313227A

advertisement

Was this manual useful for you? Yes No
Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Related manuals

advertisement