- 1 What does the fan adjustment on a spray gun do?
- 2 How do you find the correct spray pattern?
- 3 What would cause the spray pattern put out by a spray gun to be split in the middle?
- 4 What pressure should I set my spray gun?
- 5 Are LVLP spray guns any good?
- 6 How do you fix a spray gun splatter?
- 7 How do I get a smooth finish with a sprayer?
- 8 How do you prevent paint lines from spraying?
- 9 What would you do if your paint does not spray from your gun or comes out blotchy?
- 10 What’s the difference between a 515 and a 517 spray tip?
- 11 What causes bad spray pattern?
What does the fan adjustment on a spray gun do?
The fan control, commonly found on the side of the spray gun body, adjusts the amount of air distributed to the different drillings or air passages in the air cap. The air passages that are located around the fluid nozzle are the atomization air passages.
How do you find the correct spray pattern?
To obtain the correct spray pattern, set the recommended air pressure on the gun, usually 40 to 50 psi for a conventional gun. Test the pattern of the gun by spraying a piece of masking paper taped to the wall. Hold the gun square to the wall approximately 8 to 10 inches from the surface.
What would cause the spray pattern put out by a spray gun to be split in the middle?
A split spray or one that is heavy on each end of a fan pattern and weak in the middle is usually caused by: (1) Too high an atomization air pressure (2) Attempting to get too wide a spray pattern with thin material. Reducing air pressure will correct cause (1).
What pressure should I set my spray gun?
Setting the air pressure to about 28-29 PSI for clear will ensure you having great flow out. Most HVLP spray guns will use 10-14 scfm at 40 psi. This is volume of air pressure per cubic foot.
Are LVLP spray guns any good?
LVLP spray guns are better than HVLP spray guns because they produce few defects. This is because air bubbles can be produced in high volume which can cause a lot of defects. The LVLP uses low pressure and a thin nozzle which allows a low volume of paint to be pushed out of the gun.
How do you fix a spray gun splatter?
This often happens with very thin material like stains that you are trying to keep coating to a small amount. To remedy this try applying a little more pressure to the coating and then using your fluid adjustment knob to restrict fluid to the spray gun.
How do I get a smooth finish with a sprayer?
Just wait till the paint is dry and lightly sand it with a fine grit sanding block to smooth it over. Paint over it again and you should be good to go! Here’s a quick video to demonstrate how I spray paint and get a flawless finish every time.
How do you prevent paint lines from spraying?
Here are some tips for removing streaks and disturbances in the spray pattern:
- Increase pressure.
- Dilute the paint.
- Replace worn nozzle (see Airless Q&A #6 – Worn Airless nozzles – Replace the Nozzle in Good Time)
- eliminate faults at the pump (eg clean or replace clogged filters)
What would you do if your paint does not spray from your gun or comes out blotchy?
If your paint gun is not spraying paint at all, it’s most likely due to a clog either in the air vent hole or the hose. Clean any dried paint with a toothpick, and use a cleaning solvent to clear any remaining gunk. If you’ve cleaned your paint gun and find that it still isn’t spraying, take a look at the air supply.
What’s the difference between a 515 and a 517 spray tip?
For example, a 515 tip will spray a 10-inch-wide fan and have a 15-thousandths of an inch orifice. Because the same amount of paint is leaving the orifice of the spray tip, but is being dispersed across a wider fan, the 517 tip will deliver a thinner coating with less mil build.
What causes bad spray pattern?
Common Causes of Horrible Airless Spray Patterns. Material blocking your airless tip – Depending on the coating you are spraying; material may dry on the airless sprayers tip. When this happens, the material will not flow evenly out of your airless tip. This will cause your spray pattern to be negatively affected.