Connects via Ethernet or USB using dedicated external motion controllers (such as SmoothStepper, PMDX, or Vital Systems). System Requirements

Artsoft (the creators of Mach4) designed the software with a highly secure, hardware-tied licensing model.

If you are using modern hardware, you will likely need a motion controller like the Ethernet SmoothStepper (ESS) or a UC100 . Mach4 requires a motion controller for most Windows versions (except legacy 32-bit setups).