i have a 1650 hyper therm using 80 consumbles and running 75 psi of air at 80 amps cutting 3/16 4 x 10 sheet mild steel on mach 3 on a ez router table.. going 39 ipm beacuse of poor cut quality i have talked to hyper them and the say i might have a bad piolt arc igbm board i belive. but the service man said it was fine .. so i am at a loss the cut quality looksd like is being rushed the hyper therm book say i should be able to run 140 i belive not in front of me right now.