Fixit,
Good point.
I reviewed all the wiring on the hardware side and everything looked good.
My Bob has 5 available connections for the x,y,z,a and x1
x,y and z are wired correctly.
I originally used the A connection for the 4th axis and this creates the problem I described.
I then switched it to the X1 connection and fired up Mach.
The motor does not turn, which is great.
How can I test the 4th axis by jogging it?
BTW, Thank you for your help
Rod