RE: AMDRY6420
Try with this parameters, because the cross jet is not necessary, create to much turbulence, and as I can presume, your main problem could be the powder feeder, Metco powder feeders were ever very unstables and you could not change carrier gas pressure without changing powder rate, try with a powder feeder which do not have this problem:
Gun 9MB, Nozzle GH
Gas Ar/H2, pressure 75/50 psi, Flow 80/15
Powder port n° 2
Air get 75 psi / Parallel
spray rate 38 g/minute
Power 550Amp/ 68 Volts
Spray distance 68 mm
Best regards
Luigi
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