How Do I Use a 6-Wire Stepper Motor With My Stepper Motor Jan 09, 20196-wire motors have three wires per phase. Two wire leads connect to either end of one phase with a third wire connected to the center point between the coils as shown in Figure 1. This third wire is commonly referred to as the phase's center tap. To connect the motor for unipolar operation, the six wires are configured essentially as an H-bridge.[PDF] 6 Wire Unipolar Stepper Motor Control Using The Big Easy Setting up the BED to drive a 6-wire stepper motor The BED controls stepper motors by cycling power between the four half-coils in sequence to rotate the magnet in the motor. This connection is made slightly more complicated due to the need for a 6-wire unipolar stepper motor to have its center tap wires connected to the positive voltage source.