Spray gun adjustment
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Senior User
Joined: Oct 2003
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From: Lewisville, NC
Spray gun adjustment
I got a new spray gun last week and had a bit of trouble with it. It's this one http://cgi.ebay.com/ebaymotors/ws/eB...category=43987
The spray pattern was smaller than expected, and I had the paint drying VERY quickly. It's a primer surfacer for enamel paints, thinned one to one (per spec). I got a fluffy overspray of dried paint bits that I had to constantly keep wiped away. Couldn't figure out the controls well enough to know what I was doing wrong and no directions with the gun.
My siphon gun has only one control for paint volume, but this new gun is gravity feed and has an additional control near the air inlet and another above the paint feed adjustment.
Can someone give me some basics? Thanks.
-Scott
The spray pattern was smaller than expected, and I had the paint drying VERY quickly. It's a primer surfacer for enamel paints, thinned one to one (per spec). I got a fluffy overspray of dried paint bits that I had to constantly keep wiped away. Couldn't figure out the controls well enough to know what I was doing wrong and no directions with the gun.
My siphon gun has only one control for paint volume, but this new gun is gravity feed and has an additional control near the air inlet and another above the paint feed adjustment.
Can someone give me some basics? Thanks.
-Scott
Elder User
Joined: Mar 2003
Posts: 999
Likes: 1
From: Willamette Valley Oregon
<cr>
Scott
I'm taking a guess at this. I have a similiar looking HVLP gun and this is how I adjust it.
I will refer to the controls as top (at the top of the gun), middle, and bottom (at air inlet). The top controls the fan width. The middle controls the tip. The bottom controls the amount of paint.
With the gun empty, set the middle by backing it all the way off. Pull the trigger and hold. Start turning the control. You will reach a point where you can feel the trigger being pushed forward. At this point, turn the control a 1/2 turn more. Stop. The control is set and should not be adjusted again during your paint session.
I don't have a real suggestion on setting the bottom control. I just set it so paint flows through the gun. Once I have paint flowing, I forget the control. I might go through several painting sessions and never touch this control. About the only time I do is if the control gets changed during a cleaning. It doesn't seem to be very critical.
The top control is used to adjust your fan width. You set this when you have paint in your gun and are spraying some test patterns. Set it so you get a 8-10" fan.
I hope this helps you
Dennis
Scott
I'm taking a guess at this. I have a similiar looking HVLP gun and this is how I adjust it.
I will refer to the controls as top (at the top of the gun), middle, and bottom (at air inlet). The top controls the fan width. The middle controls the tip. The bottom controls the amount of paint.
With the gun empty, set the middle by backing it all the way off. Pull the trigger and hold. Start turning the control. You will reach a point where you can feel the trigger being pushed forward. At this point, turn the control a 1/2 turn more. Stop. The control is set and should not be adjusted again during your paint session.
I don't have a real suggestion on setting the bottom control. I just set it so paint flows through the gun. Once I have paint flowing, I forget the control. I might go through several painting sessions and never touch this control. About the only time I do is if the control gets changed during a cleaning. It doesn't seem to be very critical.
The top control is used to adjust your fan width. You set this when you have paint in your gun and are spraying some test patterns. Set it so you get a 8-10" fan.
I hope this helps you
Dennis
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Senior User
Joined: Oct 2003
Posts: 278
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From: Lewisville, NC
Is this an HVLP gun? It didn't say that anywhere in the ad or docs.
Assuming it is not HVLP (because I only have a regular compressor)
I'll try your suggestions. I was only getting a 2" fan width and that didn't seem right. What causes the puffy dry overspray (which could screw things up....
-Scott
Assuming it is not HVLP (because I only have a regular compressor)
I'll try your suggestions. I was only getting a 2" fan width and that didn't seem right. What causes the puffy dry overspray (which could screw things up....
-Scott
Elder User
Joined: Mar 2003
Posts: 999
Likes: 1
From: Willamette Valley Oregon
<cr>
It doesn't say it's a HVLP so I'm assuming it is a standard gun.
You should be getting more that a 2" fan. Even a small detail gun can be adjusted to more than a 2" fan.
It sounds like you are getting a dry spray condition. That means the paint is drying before it hits the surface. The paint can't flow out when dry. That can be caused by a number of factors but the most common is that holding the gun too far away from the work surface.
I don't understand what is going on. A 2" fan should be producing too much paint. Are you sure the bottom control is open enough?
It doesn't say it's a HVLP so I'm assuming it is a standard gun.
You should be getting more that a 2" fan. Even a small detail gun can be adjusted to more than a 2" fan.
It sounds like you are getting a dry spray condition. That means the paint is drying before it hits the surface. The paint can't flow out when dry. That can be caused by a number of factors but the most common is that holding the gun too far away from the work surface.
I don't understand what is going on. A 2" fan should be producing too much paint. Are you sure the bottom control is open enough?
