VFD Inverter and Mach3 Software

VFD Inverter necessary to run a CNC using Mach3? I’m just getting started but I didn’t read that you need a VFD Inverrter to run Mach3 for Spindle on CNC! My setup is using Mach3 on a Windows XP and 32 Bit, going Parallel line direct. No Break out Board is needed, and you can run from 3040t CNC Controller?
Tom Megna