(your bipolar four wire motor?) Modern-day via 1a, 1b coils will flip the rotor so it's miles aligned as shown above. Activate the contemporary (in the best course) the rotor turns clockwise (1/2 step) among 1a, 2a. Turn off the modern to 1a, 1b and the rotor turns clockwise (every other 1/2 step) to align with 2a, 2b. Reversing the path of the modern in the coils produces movement inside the identical path. To change path you need to opposite the contemporary in one set of coils only. In the mean time the 2 motors are related in parallel and turn in the identical course. Switch one of the coil pairs over and also you ought to be capable of get the two automobiles turn inside the contrary path with the same pressure sign.