How can I avoid streaks from a paint sprayer?
It's hard to make out what's going on from the picture but the usual culprit when spraying is either an imperfection in your fan(spray pattern) or problems with your prep work. Take your sprayer and shoot a short burst at a smooth surface (a piece of cardboard works) If the pattern shows any obvious abnormalities, it's either not enough air pressure or a defect in the tip itself (or sometimes just a goober of finish clinging to the tip). A pattern like this


is classic low pressure. A bunged tip will look less symmetrical but the streaks left in the finish can look very similar.

If the fan looks good and the problem doesn't show up on test pieces, take a hard look at the surface of your cabinets. They might need a little more scuff sanding or a good cleaning with TSP to get the grease off.