I have a Huanyang VFD, and 4KW Spindle. I have a UC400ETH UCCNC Ethernet adapter board, Sainsmart ST-V3 Breakout board with CNC4PC C41S Spindle Control Board. I was told that I have to control the spindle with via the Spindle control board, using PWM. But, how should I configure my electronics to receive signal from my computer?