47
GM 5000EA
B_04383
OPERATING MANUAL
EDITION 04/2016
ORDER NUMBER DOC2344499
7.3.2
CHECKING THE SPRAY PATTERN (WITHOUT ELECTROSTATICS)
Start air-spraying (without electrostatics)
1. Switch off control unit (the grounding of the spray gun via the gun cable is
maintained).
2. Start up with product supply generator set to approx. 0.05 to 0.15 MPa; 0.5 to 1.5 bar;
7 to 22 psi operating pressure. See corresponding operating manual.
3. Set atomizing air regulator (4) to approx. 1–4 bar.
4. Open air regulator at the rear of the gun.
5. Spray (actuate trigger) and check the atomization.
6. Set the fl uid pressure on the product pressure generator until good product
atomization is achieved.
7. Adjust the atomizing air regulator (4) until optimal atomization is achieved.
8. Flat jet process: with the air adjustment on the gun, set the ratio of shaping air/
atomizing air so as to achieve an optimum spray pattern.
Changing the Flow Rate
Adapt product pressure.
Use a diff erent nozzle (see Chapter 13).
Limit the valve needle stroke with the adjustment screw on the side of the gun.
Spray pattern and air regulation
The spray pattern can be optimally adjusted to suit the object being sprayed using the air
regulator. The illustration shows the infl uence of the regulator on the spraying pattern.
Other nozzle sizes can be used to obtain larger or smaller spraying patterns.
Round-jet method
Open air regulation.
The size of the air cap should
match with the nozzle size.
Flat jet method
Air regulation closed.
Air regulation fully
opened.
