I am by far no expert on any of them but I have built my own CNC machine and I use HobbyCNC to run my motors. When I turn the switch on my HobbyCNC controller on the fan starts AND my motors lock up. My guess is that you have the motors installed incorrectly.
I know that if you take wires from the same circuit within the motor and touch them together the motor gets harder to move, if the wires from differents circuits are touched together the motor is easy to move. You should be able to use this to check to see if you have wired them to the controller correctly.
Hope that helps