Jimmy: Don't be too upset over it. I have the standard NVUM and it does work pretty well it just has some issues. I gave up on the hassles that went with a parallel interface and I don't regret it. I have my mill working with one exception. The manual is atrocious, but read it thoroughly anyway. First: It does nothing without a driver installed. I hope you have found this location:
NVUM-sp-cnc controller That link has the driver I am using. I have found several drivers but only one that worked for almost everything. It is stable I do not see any weird issues, but I can not get the hard wired MPG pendant to work. All signals are working 100% but only half of the signals in Mach3 are active for it. You did not say what software you are using, but Mach3 has a great installation guide. Feel free to ask whatever questions you want, I am sure someone here will try to answer. Good luck.