Stepper Motor Torque Measurement

The motor s position can be caused to move and hold at one of these steps as long as the motor is carefully sized to the application in respect to torque and speed.

Stepper motor torque measurement.

Holding torque is one of the primary benefits that stepper motors offer versus servo motors making stepper designs a good choice for cases where a load needs to be held in place. A stepper motor is a popular type of synchronous motor because it allows for precise movements or steps. It is a simple indication of the strength of the motor. These characteristics are depicted in two curves on the motor s torque speed chart and it s important to understand the differences between these curves and what each one means for the motor s operation.

Stepper motors have different torque speed characteristics depending on whether the motor is starting stopping or already running. Holding torque is a measurement of how much rotating force is required to force a stationary stepper motor shaft out of position. If you can measure the force that is the most accurate way to find the force since it takes care of the all efficiency and coefficient of frictions on the every part. However use the formulas below when calculating the acceleration torque for stepper or servo motors on the basis of pulse speed.

A stepper motor s holding torque is the amount of torque needed in order to move the motor one full step when the windings are energized but the rotor is stationary. Microstepping is a method of controlling stepper motors typically used to achieve higher resolution or smoother motion at low speeds. Load torque actual measurement. For example a stepper motor with a 1 8 degree step angle will make 200 steps for every full revolution of the motor 360 1 8.

Stepper motors move in discrete steps or fractions of a revolution. This measurement is taken across a wide range of speeds and the results are used to generate the stepper motor s dynamic performance curve. This type of motor also produces a lot of torque given it size which is why it has found itself in a number of industrial applications.