Originally Posted by
CNCMAN172
George,
I provided instruction for using MACH4, but just noticed you did not say which CNC software you are using, and Mach3 will be different set of instructions. Port2-Pin1 is the where the variable DC voltages leaves you CM106 breakout board which goes to the VFD.
The CM106 appears to have 7 user relays: on Port-1, Pin1, Port1-Pin14, Port1-Pin16, Port1-17, Port2-Pin14, Port2-16, Port2-Pin17
The board is taking PWM signal from the ESS and converts that to a voltage that is sent to the spindle.
Russ