Driving a Chinese spindle VFD from mach3

[jcb121]

I've used several of these spindle boards from Roy at DIYCNC with no problems, simple and easy. Spindle boards

You only really need this if you want to control the speed.
If you just want to turn on/off then usually your BOB will have relay outputs so just use these to control Run signals on VFD.

i have a DIYCNC BOB and it's pretty basic. or at least I think it is, I don't even use the charge pump feature :l

So I'd run a wire from my BOB to a relay then to one of the terminals on the VFD and I'm guessing I have to connect the grounds of the VFD to the BOB?

ninja edit: i may have to buy one of These

and in mach3.... I've not a clue! all I know how to do is Jog, load g-gcode and zero it! I'm truly a mach beginner.

I might just buy a usb to RS845 and run it like this
at least there's a bit of documentation.