By oekmont - 5/16/2018 2:26:15 PM
Hello everyone,
I thought, I could speed up some projects with the Cup gun, because it looked easy to clean.
Well, it certainly is, for a spray gun.
But I can't get it working properly. the spray pattern is really, really bad, no matter what I do. And the output is very limited. Additionally, the spray cone is far to wide, i am literally spraying half of my workshop.
First, I thought the polyester gelcoat might be to thick, so I thinned it slowly with compatible polyester resin. Basically with unthicked gelcoat. Still, only "drop throwing". In the very end, it was so liquid, it ran off the nozzle with or without air pressure.
Then I thought a different product might work better. So I took the only thing I got from Ec that was listed in the description of the gun, pattern coat primer. Same result.
Pressure was right, although I played with it later, without getting better results. temperature was 20°C. I checked every connection and every bore of the gun. Everything seemes to be as intended.
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By oekmont - 5/18/2018 6:24:57 AM
When i use the gun like in the bonnet video, the spray result is not like in the bonnet video. To be honest, not even usable.
My experience so far is, that this is because the nozzle can't reach it's final position, because of the misaligned nozzle/cup support. The nozzle sits crooked and about 1cm back in it's counterpart, leaving the sealing malfunctioning und therefore leaking. When proceeding as in the video, I cannot, even with great force, get it in place.
I rewatched the video, and at 1:29 it seems like the nozzle sits far better than mine, although not 100% at stop.
I guess a few seconds at the belt sander might solve my problem, as the cup support just needs to got down a bit.
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