29
6.1
Correcting spray pattern flaws
The following table shows the settings you can use to change the spray pattern.
Spray pattern
test
Fault
Required adjustment
Spray pattern is split in
the centre
• setting a wider spray pattern
Spray pattern is too thick
at the ends
• Setting a more rounded spray
pattern
The spray pattern shows
rather large droplets
• Increase the nozzle air pres-
sure
Material application in
the centre of the spray
pattern is very thin
• Decrease the nozzle air pres-
sure
Spray pattern is split in
the centre
• Increase the nozzle diameter
• Reduce nozzle air pressure
• Increase material pressure
Spray pattern is very
spherical
• Reduce material pressure
• Increase nozzle air pressure
7
Troubleshooting and fault rectification
Warning
Prior to any seervicing and repair work: Make sure that the spray gun is in unpres-
surized condition, i.e. air input must be shut off - if not, imminent risk of injury.
Fault
Cause
Remedy
Gun is dripping
Material needle or nozzle soiled or
damaged
Spring bushing (N° 6) turned too
far to the back
• Clean or replace
• Adjust by turning
clockwise
Pulsating or
unsteady jet
Not enough material in material
tank
Cup is tilted too much during
spraying operation
Material nozzle loose or damaged
• Top-up material level
• Keep it level
• Fasten or replace
Gun keeps blo-
wing in off-position
Valve spring (N° 5.3) or
valve cone (N° 5.2) damaged
• Replace
desired spray result
