Hi there! I have a home built plasma table that I run with a Dell All-in-One/Windows 8.1, Mach3, Ethernet Smoothstepper mounted to a CNC4You BoB, and Proma THC. I used to use a USB BoB but I couldn't get THC to work at all and was told that Mach won't allow THC while using USB, so I bought a Smoothstepper. After I got the plugins all working and my drives all calibrated I can cut parts perfectly but Mach3 still doesn't allow THC/Z movement while running a part. It works if I run the test while the machine is idle and I can see all the inputs in the Diag. screen so Mach3 is picking up the signals. Seems like Mach3 is blocking the movement while a code is running. And yes, I tried the "Allow THC Movement When Not In THC Mode" on or off doesn't work. Does anybody out there use a setup like this that works? I'd like to hear from you! Thanks in advance!!!