Stepper Motor Torque Measurement

This measurement is taken across a wide range of speeds and the results are used to generate the stepper motor s dynamic performance curve.

Stepper motor torque measurement.

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. 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. Measuring stepper motors simple apparatus to enable measuring of stepper motor torque and phase angle roman black orig 2001 updated aug 2006 basics of stepper motor torque stepper motor holding torque is one of the main specs of any stepper motor. Load torque actual measurement.

However use the formulas below when calculating the acceleration torque for stepper or servo motors on the basis of pulse speed. Stepper motors have different torque speed characteristics depending on whether the motor is starting stopping or already running. Stepper motors move in discrete steps or fractions of a revolution. 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.

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. Microstepping is a method of controlling stepper motors typically used to achieve higher resolution or smoother motion at low speeds. 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. The stepper motor pull out torque is measured by accelerating the motor to the desired speed and then increasing the torque loading until the motor stalls or misses steps.

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. 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. This tool is designed to calculate the maximum speed of a.