Technical data

21
GM 4600AC
B_00071
B_02262
OPERATING MANUAL
EDITION 04/2009
Part No. DOC394861
5.4 WORKS
5.4.1 START-UP FOR SPRAYING AIRCOAT
1. Start up with material supply set to approx. 8 MPa; 80 bar; 1160 psi operating
pressure.
2. Spray (release trigger safety catch and pull trigger) and check the atomisation.
3. Set the fl uid pressure to the point where a further increase in fl uid pressure would
signifi cantly improve fl uid atomization.
4. Open air pressure controller for the atomizer air and adjust so as to achieve optimal
atomization. (The interrelation between spray pattern and atomizer air is shown in the
fi gure below).
5. Adjust the pressure to get the optimum spraying fi nish. Relation between spray pattern
and shaping air see illustration.
Note:
Repeat point 4 and 5 until the optimum spray pattern is reached (process iterative).
Spray pattern
No atomizing air too little atomizing air correct amount of air
5.4.2 ADJUSTING THE SPRAY PATTERN
The spray pattern can be adjusted to suit the object being sprayed using the fan air regula-
tor. The illustration below shows the infl uence of the shaping air regulator on the spraying
pattern.
Other nozzle sizes can be used to obtain larger or smaller spraying patterns.
Shaping air
fully closed
Shaping air
fully open
Note
The paint output volume can be changed by:
•
Changing the material pressure or
•
Fitting another fl at jet nozzle (see chap. 5.4.3 and chap. 9).