Model W1802 2 QT. Professional Spray Gun
Atomizing Cap and Fan
Adjustments
The atomizing cap needs to be adjusted for horizontal or vertical spraying patterns. Spraying in the wrong direction may lead to material build up on the atomizing cap horn. Many performance problems are caused by clogged atomizing holes on the atomizing cap horns (see Cleaning on Page 11).
Holes 
Stroke
Figure 12. Set up for horizontal stroke
direction with vertical fan pattern.
Stroke
Figure 13. Set up for vertical spray stroke
with horizontal fan pattern.
Rotating the pattern adjustment knob in Figure 14 will give you a range between the two patterns in Figure 15.
Pattern Adjustment Knob