Everything works the way it should except the z-axis which will only go down. I even had the cnc manufacturer port into my computer and reset mach3 to my machine but when i turned it back on the next day the problem came back! I've also tried loading the backup file he created but it still persists. Does anyone know what might be causing this? Is it windows interfering ? What settings tab in Mach3 should I be looking at and what should it be set at to work properly?