I updated my turbine spray gun to a fuji T series gravity feed spray gun and I am having problems getting good results with automotive paint. I am wondering if anyone else has used these and can give me so advice on there setup they used.
Before this gun I was using the generic type gravity gun that is used in the fuji Hobby-PRO 2 setup as well as other brands. For this gun I was using 1.8 for primer, 1.3 ( because I didn't have a 1.5) for the top coat (2k) plus about 10 percent more reducer then recommended on the paint tin. I was getting better results with this gun then I am with the t series one. With the t series one I am running the same kind of setup but I am suffering more from "orange peel" finish. I have increased and decreased the amount of reducer, changed tip sizes (1.3 and 1.0 don't have a 1.5) and mucked around with the spray pattern.
The operator is at fault but just not sure where it might be or what next to do. Each time I think I have the setup correct and my test sprays look ok I try it out on a guard and just not happy with the end results. Any advice would be appreciated thanks.
Fuji T series gravity feed spray gun advice
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First question needs to be, how many turbine stages do you have in your current set-up? When I first saw this T series gun a year or so ago I thought it looked rather "restrictive" in its' overall size and interior design, however that does follow theory with the fact that we are now seeing a shift to 4+ stages in these systems. In other words more "pressure" is being introduced up to the 10 p.s.i. cap max rating. My thought was, this gun probably needs a 4 stage turbine to get "optimal" results. Older guns based on the early SICMO designs could spray even with just 1 to 2 stage turbines with decent results. On the personal side, I don't know of anybody locally here that is using that new T gun.
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That's a bit of my concern, not enough power but they also sell these guns with there 3 stage systems. I am using a 3 stage sprayfine turbine (240 volt version) and keeping hose length to a minimum, which if I remember correctly there spec for this turbine is a lot better then most 3 stage systems. I would have purchase there gun as well if I didn't already have this one.
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Well, the only thing I can add to this is another factor that is almost never addressed by most of these turbine systems people.... the turbine motors are also DIFFERENT diameters. Back 30+ years ago average motor/turbine housing diameter was 4.5 to 5 inches. Then 5.6 became more of standard. Now 7.6 is common and I recently saw a couple of 9 inch units. With larger diameters come more power and pressure. Stages aren't the only way to rate total CFM and pressure anymore. Their 3 stage that comes standard with that gun could be a larger output putting out more pressure.
Metal, wood, fiberglass, we work it all... www.furniturephysicians.com We can restore the irreplaceable!
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That makes things even more interesting...
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How badly do whip hoses effect the air flow. Not because of the extra length but due to extra joins that could disrupt the airflow. One thing I haven't tried with this gun is to remove the whip hose and see if there is any difference.
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Whip hoses can provide somewhat of a constriction in total CFM flow although there shouldn't be much of a pressure drop. Since these systems are all about volume of air moved it is possible that you could experience some problems especially with that particular gun. Remove it and see........
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Removed the whip hose and results improved.
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