I am having troubles getting the paint to flow out of the gun correctly. I followed Martinsr Basics of Basics for setting up the spray patter, but I am stil not getting good results.

I am using a Omni BC/CC and using a Finishline II HVLP gun a with a 6hp 60gallon tank. I set the pressure at 40psi on the comressor's regulator and then at the gun it's about 35psi. Material flow is 1.5 turns out. The manual states to get 10psi at the cap, pull the trigger and then set the air inlet pressure to 23psi. When I pull the trigger it drops to about 10-15psi, so I up the air inlet pressure and try painting but get heavy orange peel in some spots & lots of foggy cloudy overspray. It seems when it's set up this way, there is too much pressure. Is this because the material flow is wrong or the pressure is setup to high or low?

I'm not sure if it's doing this because there is not enough pressure or I don't have enough material flow. Some parts look good but others look like a frikken nasty orange. I thought I had my gun dialed in but it appears it's not. Hopefully, I get some answers here.

Hey sounds like your not getting enough cfm to the gun, hvlps use more air than a conentional gun, your 6hp 60 gallon compressor is it a single stage?? if so you do not have enough air to paint anything more than deck lid or fender, sounds like its starts out spraying good but then looses ,air pressure and the atomization is killed, giving you that nasty orange peel. also for bc/cc you want around a 1.3-1.4 tip for best results, if you have a bigger tip that is also adding to your orange peel problem, let us know about the compressor, and also your fluid control should be almost wide open ( trigger should just about hit handle but be just off it, maybe an 8th inch, and your air pattern control should be open all the way, then i usually have it 1.5-3 turns in, i use this set-up for all the spray guns i use, primer, base, and clear coat guns, i also leave my air regulator on 90 psi, i think leaving it at 40 psi and then having a hose and also beginging to spray you sre losing pressure, goodluck
Jake
jake

Thanks for the info, I think it's the amount of fluid coming out. It was only set about halfway out, I am going to try opening it up more to get more paint on the surface. The compressor is running but I don't notice the air pressure dropping(i'll keep and eye on that too)

I was using a 1.4 tip on the Finishline and the compressor is a single stage. The manual says a 3hp compressor is all the gun needs, so it sounds like they are wrong about that.

ss396, yeah turn the fluid control out almost all the way, so the trigger just about touches the handle, goodluck and let us know
jake

Sprayguns are like carburetors the proper fluid to air ratio is the key. one gun setting will not be adequate for all spraying. When you get comfortable with the gun you'll be able to dial it down for small parts and jambs and blends and also set it for up for larger things like a complete refinish. HVLP guns are more sensitive and take a bit longer to learn in my opinion. Air volume is especially critical with the HVLP and most guns respond well to a larger diameter hose and hiflow couplers. The trigger adjustment is your fluid volume-more trigger more fluid-basic. I do not adjust my trigger stop I prefer to regulate the pull manually as I spray. You'll get the hang of it. I never recomend HVLP guns to first timers but if that's what you've got then that's what you'll use. graemlins/beers.gif