Knowing now that its never worked for you then You need to go back to basics and just get the machine talking to mach3 So it moves the axis.
That board is a spindle board and won't affect anything but the spindle so dont worry about that now.

In it's basic form all you need to get machine moving is to connect drives to Bob and provide power. Limits', e-estop and everything else can be left disconnected.

Then in mach3 just set correct step n direction pins for each drive in motor outputs. You can ignore any input/outputs as they only apply if being used. you will have to toggle estop active high/low so mach resets.

When you have movement then you can start putting the limits etc back into use.

Trying to trouble shoot a machine you know nothing about is like fubbling around in dark. Better to just start again at the beggining.





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