I'll start with the spray booth. I took an old disfunctional computer = monitor and ripped it of its content. Then I wrapped it in tape to make = it airtight, drilled a hole in the back and attached a 230 V small fan = to the outside of the back. Then I stuffed the back of the inside of = the old monitor case with a "Hepa-filter" cut to size. Not fancy at all = but works quite well with acrylics/alcohol. The Hepa-filter seems to = absorb most of the fumes/dust. This was made in an afternoon and works = really great. I guess you could improve on the design...
So for the question: I have a compressor of a brand called "Werther = International"(?). It's a small compressor with a diminutive air-tank. = The question I have is how to read the pressure gauge. The more I think = of it the more confused I get. The compressor is a fairly simple design = with a "waste-gate" attached as a shunt (in parallell) with the = air-outlet. By opening the shunt I can lower the output pressure. The = pressure gauge is, as I understand it, measuring the pressure at the = outlet. Now say I adjust the shunt so the gauge reads 20 psi when I'm = not pressing the trigger on the airbrush. Then I press the trigger so = the gauge reads 15 psi. Am I spraying with 15 psi or 20-15=3D5 psi? = The more I press the trigger, the more air comes out but at the same = time the measured pressure get lower. So how do I read this gauge? If = the gauge measures the spraying pressure the only way to spray at 30 psi = is not to press the trigger at all!
Please help me!