Stepper motor and drive selection method: To determine the need for more torque: static torque is the choice of step, into the motor one of the main parameters. When the load is large, it is necessary to use torque motor. When the torque index is big, the motor has a large shape. To determine the speed of motor operation: high speed, should be selected phase current, inductance smaller motor, in order to increase power input. And the higher power supply voltage is used when selecting the drive. Select the installation specifications of the motor: such as 57, 86, 110, mainly with the torque requirements. Determine the positioning accuracy and vibration requirements: to determine whether the need to subdivide, how much subdivision required.