Out of ignorance on my part......
Is that TB6560 board meant for 3d printers?
If so then it's functionality may not be appropriate for Mach cnc control.
Now if that board is anything like the TB6550, which is pure Chinese junk in my opinion, and I personaly do not waste time on it for any reason anymore.
That said, my friend built a 3d printer and uses Arduino and know he uses Mach for intial setup of the extruder and axis locations but I am not sure what drives he is using. If they are a TB6560 I will reply back,
if not...........
Someone more knowledgable than me may give you good advice, but, in the mean time don't
recomend experimenting as you will / may blow the drive.
RICH