NOTE!!!!!! STEPCRAFT USERS>>> You need the UC100 + parallel port for the machine interface + UCCNC licensee to control your STEPCRAFT machine with the UCCNC software. The UC100 motion controller is very small addition to your CNC system that has the potential to significantly improve the performance of your setup. The UC100 is Mach3 Compatible and can provide a full USB replacement for your LPT driven system. For example if you are using Mach3 to control your CNC with an LPT port you can simply install the drivers, plugin the UC100 and control the same CNC machine via USB.
The UC100 can also be run on UCCNC which is the CNC control control software provided by CNC drive who also manufacture the UC100's.