1.Positioning or residual torque: when there is no current passing through the winding, the torque required to make the output shaft of the motor rotate.

2.Driver: an electrical control device used to run the stepping motor. This includes power supply, logic programmer, switching element and a variable frequency pulse source which determines the step rate.

3.Dynamic torque: the torque produced by the motor at a certain step rate. The dynamic torque can be expressed by PULL IN torque or PULL OUT torque.

4.Holding torque: when the winding is supplied with steady-state DC, it can make the output shaft of the motor rotate.

5.Inertia: the inertial measurement of acceleration or deceleration of an object. It is used here to refer to the inertia of the load to be moved by the motor, or the inertia of the motor rotor.

  1. Linear step growth (or step size): the linear stroke produced by each step angle of the rotor.
  2. Maximum temperature rise: determined by the resistance pull-up mode, the motor is installed in a ventilated environment to keep the current in the coil constant.

8.PULL IN torque: it is necessary to overcome the acceleration torque of rotor inertia, external load and various friction torque of fixed connection during acceleration. Therefore, the PULL IN torque is usually less than the PULL OUT torque.

9.PULL OUT torque: the maximum torque that the motor can produce at constant speed. Because the speed is constant, there is no moment of inertia. At the same time, the kinetic energy and inertia load inside the rotor increase the PULL OUT torque.

  1. Pulse rate: the number of pulses per second (PPS) applied to the motor windings. The pulse rate is equal to the motor step rate.

Pulses per second (PPS): the number of steps produced by the motor in one second (sometimes called "steps per second"). This is determined by the pulse frequency generated by the motor driver.

  1. Speed up and down: a driving technology that increases the given load from the original low step speed to the maximum, and then reduces it to the original speed without losing step of the motor.
  2. Single step response: the time required for the motor to complete a step.
  3. Stepping: the angle of the rotor when the motor receives a pulse. For linear motor, step is linear distance.
  4. Step angle: the rotation produced by the rotor in each step, measured in degrees.
  5. Steps per week: the total number of steps required for the rotor to rotate 360 degrees.
  6. Ratio of torque to inertia: holding torque divided by rotor moment of inertia.